Matplotlib legend box

Matplotlib legend box. legend(loc="upper right", edgecolor="black") legend. matplotlib. Below are examples. edited Sep 13, 2019 at 15:53. width, bb. from matplotlib. Didn't find it at first because it's not an input argument of the plt. randn(10, 5)) df2. ncols int，默认值：1. For example, to set the legend box to the right of the plot area: Plot legends give meaning to a visualization, assigning meaning to the various plot elements. Stem plots are particularly useful for visualizing discrete data sets, where the values are represented as “stems” extending from a baseline, with data points indicated as “leaves” along the stems. The end user would import both images into another tool (e. While not all artist types are covered by the default legend handlers, custom legend handlers can be defined to support arbitrary objects. , but couldn't find any. fig. boxplot(data) plt. The following figure explains it better (the upper right corner of the figure): 2. p0, bb. initialization, you can turn it off after the legend is created. Apr 8, 2024 · Output. This guide makes use of some common terms, which are documented here for clarity: legend entry. Matplotlib is a popular data visualization library in Python known for its flexibility and high-quality visualizations. 4 ) Feb 1, 2021 · Matplotlibでは、デフォルトでは凡例は表示されません。 「凡例（legend）を表示するにはどうしたらいいの？！」「凡例の位置や見た目の設定方法がわからない！」という方向けに、「凡例を表示する関数plt. plot(legend=False) plt. legend(loc='upper left') print 'Height of legend before 범례 (Legend) 는 그래프에 데이터의 종류를 표시하기 위한 텍스트 입니다. I picked a matplotlib. legend really just delegates to gca(). shadow -> This argument gives shadow behind the legend. If it is in the lower left corner it will move up and to the right. It will automatically try to determine a useful number of legend entries to be shown and return a tuple of handles and labels. Keyworkd: plt. First, assign your legend to a variable when you create it: Then: lh. Jan 27, 2020 · That works nicely on the main part of the figure, but not on the legend. let’s understand the components of a typical The number of marker points in the legend when creating a legend entry for a PathCollection (scatter plot). edited Sep 27, 2013 at 19:26. Default is True. 图例的列数。 为了向后兼容，拼写ncol也受支持，但不鼓励使用。如果两者都给出，则ncols优先。. A legend is made up of one or more legend entries. In your case something like: plt. Animation; matplotlib. Code snippet: Jun 21, 2016 · Should work very well. So my question is, is there a way to fix these two problems? The matplotlib version I'm using is 0. 4 GHz, what is the long-term effect on living tissue of exposure to this frequency, but with a thousand times less energy? From matplotlib version 2. add_artist(leg) That gives me the following result. text (), I'm using legend() and the following workaround to obtain auto-placement for simple text boxes: lw=0, alpha=0)] * 2. legend() to use modified handles. 2), handles=[patch_example]) If you copy and paste the image out of Jupyter Notebook, then the title, legend, and y-label have a transparent background. Thus, one could use: plt. get_frame(). Dec 11, 2015 · Thus, instead of getting 5 repeated green, then 5 repeated red, 5 repeated blue then 2 other, I get 5 -4 -4 -4 (where I would have prefered 5 - 5 - 5 - 2) You can clearly see this in attached image. r. Default is [0. 'pandas' plots return AxesSubplot objects which can not be used for generating legends. The most important and in itself sufficient is the loc argument. linspace (0, 1) fig, (ax) = plt. legend = plt. pyplot as plt import numpy as np import matplotlib. cases is preferable to turning the frame off entirely:: leg = ax. Most users would normally create a legend via the legend () function. legend, since plt. Apr 26, 2020 · You can add two different legends by specifying one for the Axes object and one for the Figure object, as below. Rectangle with no fill and 0 linewdith below, but you could use any supported artist. The following examples show how to plot boxes with different visual properties. markerfirst: bool. legend() as before will set the default legend border width to 15 points. Next we'll show off multiple fancy boxes at once. The pad argument for tight_layout is the fraction of the mean axes size, so if it is 0. Jul 17, 2020 · The legend handler map specifies how to create legend handles from artists (lines, patches, etc. bbox_to_anchor=[x0, y0] will create a bounding box with lower left corner at position [x0, y0]. The legend module defines the Legend class, which is responsible for drawing legends associated with axes and/or figures. patches module. subplots_adjust(right=0. Important. 0, 0. Then, we can use the bbox_to_anchor argument that offers a degree of control for manual legend placement. leg = legend () leg. Dec 24, 2023 · The approach with Patch forces you to add the text to the legend only once and at the end of the axis processing, as it requires plt. 3. ch0, = plt. Default legend handlers are defined in the legend_handler module. legend_elements method. 0 is at the top. You must generate you own legend using proxy artist instead. First, we need to shrink the width of the plot so that the legend fits the figure. ax, lines, # list of line handles. For example, let's say you have 4 bar objects Sep 7, 2020 · The following code shows how to place the legend in the bottom right corner outside of a Matplotlib plot: #create plot. font_manager. Stem Plot in Matplotlib. , loc="upper right" places the legend in the upper right corner of the bounding box, which by default extents from (0, 0) to (1, 1) in axes coordinates (or in bounding box notation (x0, y0, width, height) = (0, 0, 1, 1)). Feb 28, 2019 · Then you can safely create a legend that doesn't overlay your data: ax. swarmplot on scatter, so all you need is to give them respectively a labels and label argument. A stem plot, also known as a stem-and-leaf plot, is a type of plot used to display data along a number line. A dictionary of properties to set for the annotation bounding box, for example boxstyle and alpha. 5, 1. If they are not, then use a list instead. 8) answered Jun 6, 2022 at 17:48. I scripted something as example to you : import numpy as np. markerscale"] = 1. public methods and initialization option will be added in the future release. Right now I use these options for the legend: axp. Control whether the legend should be drawn on a patch (frame). fancybox: None or bool Placing the legend (bbox_to_anchor)A legend is positioned inside the bounding box of the axes using the loc argument to plt. Create line1 and line2 using two lists with different line widths. borderpad float, default: rcParams["legend. legend. transFigure. 9: lh. By following this tutorial, you will learn how to create a legend with a color box on your Matplotlib figure, making your visualizations more informative and visually appealing. 1) t2 = np. To draw all markers at the same height, set to [0. If True, legend marker is placed to the left of the legend label. 4 Control Matplotlib legend box width for wrapping Mar 24, 2015 · As of matplotlib version 3. Example using the same color as the corresponding artist by setting labelcolor='linecolor' : Oct 8, 2021 · Here I manually add Bbox with to each text entry in legend and later add it to axes as. plot() calls or by assigning your labels as a tuple or list within legend, as in this working example: The number of marker points in the legend when creating a legend entry for a PathCollection (scatter plot). y_value determines the height of the legend. get_frame (). You can also try this command, to compare : plt. FontProperties 或 dict May 12, 2021 · To adjust the size of a matplotlib legend box, we can use borderpad arguments in the legend method. Nov 28, 2017 · A dictionary mapping each component of the boxplot to a list of the matplotlib. legend() to specify the legend background color. The question is quite old but as there is no general solution to the problem till now (2019) according to Add loc=best kwarg to pyplot. I want the entire area of the image that's created to have a solid white background. show() This adds extra space between the legend and the figure boundary so when it is in the lower right corner it will move up and to the left. prop 无 or matplotlib. legend() method. 99. matplotlib; matplotlib. 7, Jan 22, 2021 · Example 1: In this example, we will draw different lines with the help of matplotlib and Use the facecolor argument to plt. The entries are aligned as a single block, so that markers always lined up. set_alpha(1) to make your markers opaque for a plt. So loc specifies where inside the box the legend sits. 0. legend(loc="upper right") which will gather all handles from all subplots in the figure. legend_handler module. The script above will work for calls to ax. def add_fancy_patch_around(ax, bb, **kwargs): fancy = FancyBboxPatch(bb. Working full code: import pandas as pd. 01) fig, ax = plt. t. Example: Here is an example with legends. 5]. A patch nothing but a 2D artist with face color and edge color. N = 45 x, y = np. With the values for x_value and y_value the legend can be positioned in the subplot. import pandas as pd. df={} Jul 2, 2017 · The space between the legend and the axes border is dertermined by a parameter borderaxespad, which can be set to zero. medium-dimensional. To have the legend itself left aligned in the legend box, you may set the legend's _legend_box. As a simple example: import matplotlib. canvas. Once packed, their location is calculated during the drawing time. 25 Move and resize legends-box in matplotlib. pyplot as plt. 3 of the axes height. import matplotlib Positioning the Matplotlib Legend at the Bottom. In that case I would like to be able to set the placement of the label by first letting python/matplotlib place it using. I'm not aware of a way to do this without adding the extra This works, except that the legend is left aligned so that loc specifies the left edge/corner of the legend box and not the center. Good luck! Oct 13, 2017 · 7. Aug 13, 2021 · The legend handler map specifies how to create legend handles from artists (lines, patches, etc. ArtistAnimation Jan 16, 2013 · Moving matplotlib legend outside of the axis makes it cutoff by the figure box. legend #. . align to "left". Jul 14, 2016 · Just importing the script subclasses matplotlib. The bbox argument is in axes co-ordinates, so 0. rand(2, N) c = np Apr 5, 2023 · This method has the advantage that it gets the legend markers correct first time, they do not need to be modified afterwards, and fixes issues where the original legend markers can sometimes still be seen. frameon"]. 5 Matplotlib can wrap text automatically, but if it's too long, the text will be displayed slightly outside of the boundaries of the axis anyways. If False, legend marker is placed to the right of the legend label. That dictionary has the following keys (assuming vertical boxplots): boxes: the main body of the boxplot showing the quartiles and the median’s confidence intervals if enabled. plot([1, 2, 3]) ax. The parameters each take a dictionary with keys of artist property names and values of lists of settings with length matching the number of buttons. Regards, For those wanting to add manual legend items into a single/common legend with automatically generated items: #Imports import matplotlib. plt. scatteryoffsets iterable of floats, default: [0. legend() has a two argument form that accepts a list of objects (handles) and a list of strings (labels). Hence one would need to set the color, including alpha, manually on the legend patch. I also tried to obtain the "legend position", but legend doesn't have a *get_position()* method. The lower-left corner is (0, 0) and upper-right corner is (1, 1). legend(), which produces a legend with the handles from the axes ax, one can create a figure legend. 3, the axes gets smaller due to tight_layout and hence The Legend class can be considered as a container of legend handles and legend texts. patches. I see lots of examples on how to play around with the legend, adding columns, shadow, etc Jan 5, 2020 · The relative size of legend markers compared with the originally drawn ones. What does ** (double star/asterisk) and * (star/asterisk) do for parameters? Mar 28, 2017 · An alternative to making the box smaller is to remove the outline of the box using something like. legend_handler import HandlerLineCollection, HandlerTuple from matplotlib. show() Note that the loc argument tells Matplotlib to place the lower left corner of the legend line at the (x,y) coordinates of (1,0) in the plot. Limiting the size of legend in MatPlotLib in python, then allowing scrolling within the legend. box_alignment(float, float) A tuple of two floats for a vertical and horizontal alignment of the offset box w. figure() ax = fig. Jan 5, 2020 · The Legend class can be considered as a container of legend handles and legend texts. Jan 10, 2024 · Matplotlib. Output: Method 1: (Using frameon = False) Output : Method 2: (Using legend. _Jae-Joon_Lee1 October 2, 2009, 6:45pm 2. x = np. get_legend_handles_labels() # manually define a new patch patch = mpatches. set_alpha(1) and since Matplotlib 3. Sep 15, 2020 · I am trying to make one legend for all subplots in matplotlib. legend(loc=(x, y)) to set the legend's lower left corner to the specified (x, y) position. The 'tight' setting rescales the canvas to accommodate all content and happens before wrapping. legend where ax is an Axes instance and on plt. legend () in Python. add_subplot(111) ax. Jun 18, 2021 · you can achieve this by removing the legend and adding set_facecolor to your code, and the final code will be like that: import matplotlib. 7 but if you make the bbox move down to -0. set_linewidth(3. marker='*', markersize=10) bbox_transform=ax. e. 5 from -0. arange (0. Another option for creating a legend for a scatter is to use the PathCollection. 7,visible=True) Oct 14, 2020 · Can I make a plot legend show box plots using matplotlib? Hot Network Questions If microwave ovens run at 2. If False, legend marker is placed to the right of the Sep 13, 2019 · plt. Specify the ncol parameter in legend. To create a legend with a color box, patches are used provided by the matplotlib. legend()の使い方」「引数で位置や見た目を簡単に設定する方法」を紹介していきます。 Aug 13, 2021 · The legend_box is an instance of the OffsetBox, which is packed with legend handles and texts. get_legend_handles_labels() # Get the artists. 2,163 12 23. x_value has been eyeballed for a good correspondence with the "normal" legend. inverted() Next, get the legend extents in pixels and convert to Figure coordinates. 7) Oct 22, 2023 · Modifying Legend Box. afm; matplotlib. set_alpha(1) OR if the above doesn't work (you may be using an older version of matplotlib ): lh. According to the matplotlib legend documentation: The location can also be a 2-tuple giving the coordinates of the lower-left corner of the legend in axes coordinates (in which case bbox_to_anchor will be ignored). May 18, 2019 · If True, legend marker is placed to the left of the legend label. Alternatively, according to this you can leave the seaborn part untouched and fiddle with: handles, _ = ax. May 23, 2015 · First, draw the legend on the canvas to assign it real pixel coordinates: plt. Example May 10, 2017 · Legend guide. ax. Instead of ax. patches as mpatches # where some data has already been plotted to ax handles, labels = ax. Unfortunately, the framealpha overrides the alpha value of the actual edge- or facecolors. #place legend in top right corner. plot or a plt. tight_layout() fig. The mode="expand" will expand the legend horizontally into this bounding box, which has zero extend, effectively shrinking it to zero size. The legend will then be placed 'inside' this box and overlapp it according to the specified loc parameter. get_legend(). legend() has two main arguments to determine the position of the legend. legend(loc="lower right",ncol=4) matplotlib. You can access the Axes instance (ax) with plt. This legend guide is an extension of the documentation available at legend() - please ensure you are familiar with contents of that documentation before proceeding with this guide. The extend of the bounding box is zero - being equivalent to bbox_to_anchor=[x0, y0, 0, 0]. set_title("title") # plt. plot(range(10), label='Test') legend = ax. I have modified your code: import pandas as pd. legend (loc='upper right') Other times you don't know where your data is, and the default loc='best' will try and place the legend: ax. Oct 18, 2019 · 21. subplots # note that plot returns a list of lines. First we'll show some sample boxes with fancybox. The default value of loc is loc= “best” (upper There are 3 different sine waves shown, and we can choose which waves are displayed with the check buttons. 3125] The vertical offset (relative to the font size) for the markers created for a scatter plot legend entry. subplots (nrows=1) Apr 20, 2015 · The legend demo in the matplotlib gallery subtly shows both of these -- note that the original reset the font size and got access to the frame Rectangle (to change the color). ) in the axes or figures. axes. 0, you can now directly use the keyword argument labelcolor in matplotlib. lines. legend(loc='lower right', ncol=2, borderaxespad=3) plt. The problem is that mode="expand" will expand the legend only Jul 9, 2009 · I often set the alpha on the frame so it is translucent, which in some. edited Dec 11, 2015 at 7:17. Default is None, which will take the value from rcParams["legend. Those can be passed to the call to legend. While it is not possible to toggle the box off during the. Add one next-to-last line: legend. It is unlikely that you would ever create a Legend instance manually. bboxpropsdict, optional. import numpy as np. FuncAnimation; matplotlib. 0 is at the base the legend text, and 1. In this case, you can use. For the first answer: legend = plt. legend (fancybox=True) leg. The attribute Loc in legend() is used to specify the location of the legend. set_alpha (0. # This is actually more efficient because boxplot converts # a 2-D array into a list of vectors internally anyway. array([0,4,8,13]) The Legend class can be considered as a container of legend handles and legend texts. too long dashes and too long distance between the dashes. legend(facecolor='white', framealpha=1) will give your legend a white background without transparency. set_XXX to specify the properties of the frame. patches as mpatches. This method makes use of HandlerLine2D from the matplotlib. draw() Then define the transformation to go from pixel coordinates to Figure coordinates: invFigure = plt. g. The alignment of the legend title and the box of entries. This value can be changed at your desire. show() Below we'll generate data from five different probability distributions Mar 4, 2019 · 75. legend() but still, your legend may overlap your data, and in these cases it's nice to make the legend frame transparent. scatter, respectively. frameon: None or bool. Jan 31, 2014 · PNG file of legend only. Steps. Note: Auto-wrapping does not work together with savefig(, bbox_inches='tight'). May 31, 2021 · 1. 5) JDH. [] Using the boxes, you can get the legend artists as Dec 7, 2023 · Adding Shadow to Legend Box in Matplotlib. Jul 3, 2020 · However, instead of having all six items in the legend, (solid blue 1, solid orange 2, solid green 3, dashed blue 1, dashed orange 2, dashed green 3) I'd like to have three (solid blue 1, solid orange 2, solid green 3) and then two additional entries to disambiguate dashed from solid (solid black 'positives', dashed black 'negatives'). I searched for keywords such as align, horizontalalignment, etc. ···. animation. E. lines import Line2D t1 = np. legend() frame = legend. interactively for the final product. legend(frameon=None) You can also read the documentation on this page about plt. legend(ncol=4, columnspacing=0. Feb 8, 2021 · plt. Check buttons may be styled using the check_props, frame_props, and label_props parameters. leg = FancyLegend(. You can set the edge color and the face color separately like this: There's more information under FancyBboxPatch here. 이 페이지에서는 그래프에 다양한 방식으로 범례를 표시하는 방법에 대해 소개합니다. In case you have an already created legend, you can modify its title with set_title(). set_alpha(None) Jan 5, 2020 · The Legend class can be considered as a container of legend handles and legend texts. , lines, patches, etc. 0, 2. Dec 11, 2017 · To make a legend for lines which already exist on the axes (via plot for instance), simply call this function with an iterable of strings, one for each legend item. data = [data, d2, d2[::2]] # Multiple box plots on one Axes fig, ax = plt. If no further argument is specified, this bounding box will be the entire axes. pyplot, plt. Feb 8, 2018 · The Legend class can be considered as a container of legend handles and legend texts. Sep 27, 2013 · 8. Jun 6, 2022 · Take a look at the description of columnspacing from documentation. Hence, the figure size does not change anything to the legend positioning anymore. 5, -0. show() edited May 7 at 2:48. gca(). The legend box in a Matplotlib plot contains the labels and symbols that represent the different elements of the plot, such as lines, markers, or patches. Use a dummy object (aka a "proxy artist") for your extra string. legend ¶. borderpad"] (default: 0. columns)) This is the only line I changed in your script. Drawing fancy boxes #. 5, 0. 05), shadow=True, ncol=2) Note the introduction of the ncol=2 parameter, which sets the number of columns in the legend. Using matplotlib. 1. The vertical offset (relative to the font size) for the markers created for a scatter plot legend entry. legend(handles=[one, two, three], loc=4, fontsize='small', fancybox=True) legend. legend(). legend with some additional processing. Apr 20, 2011 · If you want to plot a Pandas dataframe and want to remove the legend, add legend=None as parameter to the plot command. pyplot 모듈의 legend () 함수를 사용해서 그래프에 범례를 표시할 수 있습니다. 0. Apr 11, 2012 · I'm familiar with the following questions: Matplotlib savefig with a legend outside the plot. Matplotlib. subplots() ax. Line2D instances created. Jan 27, 2016 · Suffice it to say that matplotlib tries to stay as general as possible, and generally avoids working with pixel values until things are drawn. _fontsize# legend_box is a HPacker, horizontally packed with# columns. ) are specified by the handler map, which defines the mapping between the plot elements and the legend handlers to be used (the default legend handlers are defined in the legend_handler module). This can be done with e. Drawing fancy boxes. 0) and the rectangle frame is heavier: sns. legend. Like it happens with this example from the 10. 1 onwards, you may use a figure legend. Each column is a VPacker, vertically packed with# legend items. DataFrame(np. Most users would normally create a legend via the legend function. 3 is 0. legend(loc="upper left") placed the legend such that it sits in the upper left corner of its bounding box. #. May 29, 2021 · Remove legend border. Jul 10, 2010 · Compared to the normal size, the small plot suffers from a legend box with too thick borders, and the dashed line is too coarse, i. plot(x, y,'r', label='CH0', linewidth=0. boxplot is based on matplotlib's boxplot and sns. df2 = pd. legend(['A simple line']) However, in order to keep the “label” and the legend element instance together, it is preferable to specify the Jun 20, 2017 · What this command does is to extend or shrink the area of the saved figure to include all the artists in it. Got the answer: legend = axes. However, the legend does not appear at all, instead I can see a small gray lined square in the specified location. Creation of corresponding legend handles from the plot elements in the axes or figures (e. 8, 1, 0. Aug 24, 2022 · How to adjust the size of matplotlib legend box. Example follows: import numpy as np. 0') and then moving the label to where I want it. legend(fontsize=16, loc='upper center',bbox_to_anchor=(0. transAxes, bbox_to_anchor=[1, 0], title='Figure A Legend') You can also have a look at if you only need the legend, without the associated Artists on the plot. ¶. microsoft power point) and arrange figure and legend. legend () function is a utility given in the Matplotlib library for Python that gives a way to label and differentiate between multiple plots in the same figure. Dec 6, 2018 · 17. This is because I want the legend to hide all diagram content behind it (be opaque for the diagram, see below), but later when embedded into the page, the background of the legend needs to allow the background color of the HTML page to shine through. In other words, if you use that code twice with different texts, you will only see the last because the legend gets replaced, while this approach let's you add text to the Sure. 3125]. set_alpha (0)) Output : Don't miss your chance to ride the wave of the data revolution! Every industry is scaling new heights by tapping into the power of data. gcf(). To move the legend to the bottom of your chart, you can adjust the legend() parameters as shown: ax. _drawFrame=False. fancybox=True, framealpha=0. 375, 0. You can customize the appearance of legend box and make it more visually appealing or aligned with the overall style of your plot. random. legend(loc="lower left", ncol=len(df. collections as mcol from matplotlib. We can make the legend have some of the basic CSS properties like adding a shadow, adding a frame and making the corners round, and also let us add transparency to the legend box if you don’t want to cover those small details in the plot by a frame. markerscale : None or int or float. Aug 28, 2014 · When plotting a plot using matplotlib: How to remove the box of the legend? How to change the color of the border of the legend box? How to remove only the border of the box of the legend? Mar 23, 2019 · Use argument bbox_to_anchor to reposition the legend box. legend Oct 2, 2009 · David. First to explain the output from the question: When using the 2-tuple notation for bbox_to_anchor, a bounding box without extent is created. the boxcoords . get_frame() and then we can use frame. legend() legend. As seen on the picture, now each legend text Dec 23, 2020 · Creating legend with color box. import matplotlib. """fontsize=self. To display the figure, use show() method. set_title() if you didn't store the. widgets import CheckButtons. How to put the legend out of the plot. Automated legend creation #. legend(loc='upper center', bbox_to_anchor=(0. To place a legend on the figure and to adjust the size of legend box, use borderpad=2 in legend() method. 5. legend() You can do this either by using the label= keyword in each of your plt. You can try: plt. This argument can be used for 2 import matplotlib. Jul 20, 2023 · In order to place the legend outside of the plot, let’s say at the center of the right side, we need to do two things. We previously saw how to create a simple legend; here we'll take a look at customizing the placement and aesthetics of the legend in Matplotlib. set_edgecolor('1. Axes so that calling ax. I don't know why you want 0. 1. ["Верхний прогноз", "Средний прогноз", "Нижний прогноз"], ) ax. Patch(color='grey', label='Manual Label') # handles is a list, so append manual patch handles Jun 3, 2023 · plt. 7, the pad will be 70% of the axes height. 2. pyplot. Alternatively, you can shrink the content of the figure, such that there is enough space for the text to fit into the original figure. fig = plt. _legmarker. height, fc=(1, 0. #show plot. 3389. For example: ax. It seems that the answers in these questions have the luxury of being able to fiddle with the exact shrinking of the axis so that the legend fits. Dec 7, 2016 · Update legend text without updating size of legend box in matplotlib. ka gf fo zh wg ha ie ea ev yo