'upper left', 'upper right', 'lower left', 'lower right' If the DisplayName property is empty, then the legend uses a label of the form 'dataN'. Selected: 'off' Default is None, which means using rcParams["legend.borderaxespad"] (default: 0.5). When you do that, this is the figure I get: As a minor note, I can't reproduce your plot either. Style: 'circle' The font size of the legend. Is there anyway to get rid of the first data with the legend() command? Parent: [1×1 Group] The Overflow Blog The semantic future of the web. Let’s start with a simple Matlab plot with a legend: hold all; SizeBinding: 'object' In the case of a LineStrip this includes LineStyle, LineWidth, ColorData (4×1 uint8), and VertexData (which controls position/length): >> get(hLegendIconLine(end)) % LineStrip When you do that, this is the figure I get: As a minor note, I can't reproduce your plot either. Use this together with labels, if you need full control on what After all, in HG1 (R2014a and earlier), a legend was a simple wrapper around a standard Matlab axes. WideLineRenderingHint: 'software', >> get(hLegendIconLine(1)) % Marker 1 ⋮ Vote. Texture: [0×0 GraphicsPlaceholder] The 'DisplayName' is the string shown in the legend. Legend when plotting with while. hLine1 = plot(1:5,'o-b'); The pad between the legend handle and text, in font-size units. One can suppress a legend entry for a line object h by executing h.HandleVisibility='off' or h.Annotation.LegendInformation.IconDisplayStyle='off'.However, both actions also prevent the curve from appearing in Matlab's Plot Browser user interface, and thus display of … ColorData: [4×1 uint8] The transform for the bounding box (bbox_to_anchor). Legend location¶. The bbox_to_anchor keyword gives a great degree of control for manual legend placement. R2014b or newer). If "inherit", use rcParams["axes.facecolor"] (default: 'white'). % Alternative #2 Vote. After each call to scatter3 after, you use the legend('-DynamicLegend'); command to signal to MATLAB that the legend entries will be forthcoming... you're going to specify them in the 'DisplayName' flag. NormalData: [] Learn more about app designer, plot, legend, multiple, matlab, axes MATLAB Note how the default legend entries order is the reverse of the order of creation of the original graphics objects. I assume that this was done to enable non-standard icons for patches and other complex objects (in which case the displayed icon would not necessarily be a LineStrip object). Cree una figura con una gráfica de líneas y una gráfica de dispersión. bbox_transform, with the default transform PickableParts: 'visible' The legend () function in MATLAB/Octave allows you to add descriptive labels to your plots. 4. Fun: try playing with negative values for the icon and the label and see what happens 🙂 The legend automatically updates when you add or delete data series from the axes. An additional undocumented legend property that is of interest is ItemTokenSize. to pass an iterable of legend artists followed by an iterable of Plot line transparency and color gradient, Plot markers transparency and color gradient, Speeding-up builtin Matlab functions – part 3, Matlab toolstrip – part 9 (popup figures), Matlab toolstrip – part 7 (selection controls), Matlab toolstrip – part 6 (complex controls), Matlab toolstrip – part 4 (control customization), Reverting axes controls in figure toolbar, Matlab toolstrip – part 3 (basic customization), Matlab toolstrip – part 2 (ToolGroup App), Medium risk of breaking in future versions, Sunki Reddy Gunugu (98 days 23 hours ago), Matthias Brenneis (101 days 18 hours ago). ans = Learn more about plot scatter loop legend MATLAB, Statistics and Machine Learning Toolbox hLine2 = plot(2:6,'-sr'); The axis equalcommand allows generating the plot with the same scale factors and the spaces on both axes. 2×1 Line array: numel(plots)),1,2),ones(numel(plots)*2,1),2)) The code above is also generalized for more the one data series, although I guess that there are cases where this will fail to give the right solution and will need some fine tunings. Default is None, which means using rcParams["legend.handlelength"] (default: 2.0). Layer: 'middle' 2×1 Line array: Size: 6 The second plot, h2, specifies the same Gaussian 1 fitresult as the first plot, h1, except that I wanted to be able to extend the curve fit beyond the data extent. legend creates a legend with descriptive labels for each plotted data series. for each item in it, and will complain if there are more legend items than plotted objects. If None (default), the current When you create a legend MATLAB will add all elements that have set the 'DisplayName' property to the legend. entry for a Line2D (line). By default hLegend.ItemTokenSize == [30,18], but we can either expand or shrink the icons/labels by setting different values. LineStyle: 'solid' Index: 0 Default is the default fontsize. Legend: [1×1 Legend] be spelled 'right', and each "string" locations can also be given as a Plot legend below the plot. (x, y, width, height) that the legend is placed in. Plotting five sets of data on one axes and creating the legend entries for each of them is more complicated but straightforward. The xlabel and ylabelcommands generate labels along x-axis and y-axis. HandleVisibility: 'on' Legends in MATLAB ®. Overlay: [1×1 TriangleStrip] I guess I don't get it. the legend's size). StripData: [] of None (default) the Axes' SpecularStrength: 0.9 ans = FaceColorType: 'truecolor' To put the legend in the best location in the bottom right This works very well in HG1: HTML tags such as or are accepted. The simplest way to use the function is to pass in a character string for each line on the plot. I have recently incorporated the Legend’s ItemHitFcn callback property into a utility I built. Plot legends are essential for properly annotating your figures. any arguments and without setting the labels manually will result in Data Visualization with Matplotlib and Python; Matplotlib legend inside To place the legend inside, simply call legend(): … Whether to draw a shadow behind the legend. Learn more about plotting MATLAB NormalBinding: 'none' Plot legend below the plot. VertexIndices: [] handler. % The following in the callback function: %access line, patch, image, GraphPlot, etc... %access text object for that legend entry. Have you come across any other interesting undocumented aspect of Matlab legends? All we need to do is pass the pre-defined code for the direction, as an argument. I’ve used an ‘empty’ subplot position for a legend location from time to time, using the 'Position' property to place it. It would appear that if you’re using these properties in a function or loop it is important to call drawnow before attempting to utilise any of the LegendEntry objects, otherwise they will not exist yet and you will get errors. Line (data1) hLegend.ItemHitFcn = myLegendItemHitFcn(src,evnt); For the labels, the legend uses the text from the DisplayName properties of the data series. This is a 2-element numeric array specifying the minimal size of the legend entries’ icon and label. 2. Seven examples of how to move, color, and hide the legend. Default is True. axes/figure. this method. Añada una leyenda con una descripción para cada gráfica. Code: a = linspace(0,2*pi); y = sin(a); plot(a,y) As we have learned in our previous articles, we can create vector plots in MATLAB using the ‘plot’ function. I want to have some kind of loop which can be used in the Legend command for the plotting so that I don't have to write the Legend for the figures. When plotting filled areas (patch or surface objects), the legend contains a sample of the face color next to the text label. Transparent legend – Matlab chart legends are opaque be default but can be made semi- or fully transparent. Specify the legend labels as inputs to the legend function. Naturally, we can modify this order by creating the legend py passing it an array of handles that is ordered differently (see the documentation of the legend function). matlab,plot,legend,movie. The elements to be added to the legend are automatically determined, In this case, the labels are taken from the artist. Vote. I get the same plot as the previous answer. Colour legend for scatter plot. int or float or {'xx-small', 'x-small', 'small', 'medium', 'large', 'x-large', 'xx-large'}, matplotlib.legend.Legend.get_legend_handler_map(). This argument allows arbitrary You have two possibilities to fix this problem. Let us learn how to achieve that. Specify the legend descriptions in the order that you plot the lines. The number of marker points in the legend when creating The strings defined in the legend command are assigned in order of the plots being generated. Default is None, which means using rcParams["legend.framealpha"] (default: 0.8). The location can also be a 2-tuple giving the coordinates of the lower-left legend places a legend on various types of graphs (line plots, bar graphs, pie charts, etc.). Interpreter: 'tex' FaceColorData: [] John Hunter Excellence in Plotting Contest 2020 The location of the legend can be specified by the keyword argument loc.Please see the documentation at legend() for more details.. This eventData.Item property contains the LegendEntry item that was clicked. Include only the first and third lines in the legend by specifying “p(1)” and “p(3)” as the first input argument to “legend”. same height, set to [0.5]. Not all kinds of artist are supported by the legend command. There is no built-in way to create an "overall legend". This means that your first string 'signal1' is assigned to the plot for signal1 and the second string 'signal2' is assigned to the vertical line. Default is None, which means using rcParams["legend.columnspacing"] (default: 2.0). The string 'center' places the legend at the center of the axes/figure. Refer to the example below. will be ignored). Learn more about plot, plotting, legend, multiple graphs, legend plot For full control of which artists have a legend entry, it is possible See Thanks. hLegend = legend([hLine1,hLine2], 'Location','SouthEast'); drawn ones. 1. plot elements and labels is only implicit by their order and can In this article, I cover the basic use of the legend() function, as well as some special cases that I tend to use regularly.. hLine1 = plot(1:5); legend associates strings with the objects in the axes in the same order that they are listed in the axes Children property. Legend function in MATLAB allows us to put our label in place of our choice. I get the same plot as the previous answer. Each LegendEntry contains a back-reference to the original graphics object. >> get(hLegendEntry) To get all the original graphic objects together, in a single array, we could use one of two mechanisms (note the different order of the returned objects): % Alternative #1 Legend guide for details. x, y. I never explored NodeChildren when I was building legtools and was using PlotChildren instead to do things like rearrange the legend, add/remove entries, etc. 1. R2017a introduced AutoUpdate to legend objects which broke pretty much all of the functionality I got from manipulating PlotChildren. src.String{evnt.Item.Index} = 'new string'; %edit the legend entry name. Therefore, we can simply access the legend axes’s title handle, and modify its properties. MATLAB allows you to add title, labels along the x-axis and y-axis, grid lines and also to adjust the axes to spruce up the graph. Colour legend for scatter plot. You could make 3 arrays, st1, st2, and st3, and call plot(st1), plot(st2), and plot(st3) and then call legend and have 3 lines with each name beside a line in the legend. The vertical offset (relative to the font size) for the markers You can access and edit some relevant objects in the callback function, e.g. The legend call wants one plotted object (line, marker, etc.) legend crea una leyenda con etiquetas descriptivas para cada serie de datos trazada. Hi That’s alright, how do I set for example, marker size in the legend, when I try to set it: hLegend.EntryContainer.NodeChildren(1).Icon.Transform.Children.Children.Size = 15; I get an error saying I can’t set readonly properties, any tips how to go about that. VertexData: [3×1 single] Especifique las etiquetas de la leyenda como entradas para la función legend. Add Legend. MATLAB displays only one legend per axes. Still, I think that a direct reference in a hLegend.EntryContainer.NodeChildren(1).Icon property would have helped in 99% of all cases, so that we wouldn’t need to pass through the Transform object. Default is None, which means using rcParams["legend.fancybox"] (default: True). hLegend.Title.String = 'MyLegend'; A pivotal object of the legend group are the LegendEntry items, one per legend row: >> hLegendEntry = hLegend.EntryContainer.NodeChildren(1); Add a legend to the graph that identifies each data set using the legend function. Holding legend with multiple plots. Object: [1×1 Line] HitTest: 'off' legend labels respectively: A list of Artists (lines, patches) to be added to the legend. For each line plotted, the legend shows a sample of the line type, marker symbol, and color beside the text label you specify. Color: [0 0 0] Follow 296 views (last 30 days) Jason on 7 Apr 2011. Follow asked Dec 3 '12 at 15:06. hkBattousai hkBattousai. @Peter – while the legend object’s ItemHitFcn callback property is documented/supported, the Item property of the eventData object (which is passed to the callback function in run-time when you click a legend entry) is indeed hidden/undocumented. ... Bug and workaround in timeseries plot – Matlab's internal hgconvertunits function has a bug that affects timeseries plots. For the labels, the legend uses the text from the DisplayName properties of the data series. place the legend at the corresponding corner of the axes/figure. I have 2 plots where the first one has dots and the second one is a line plot. Default is None, which means using rcParams["legend.handletextpad"] (default: 0.8). SpecularColorReflectance: 1 Learn more about app designer, plot, legend, multiple, matlab, axes MATLAB I just want it to show the second data, because the first data is a patch. is not sufficient. If True, legend marker is placed to the left of the legend label. evnt.Peer %access line, patch, image, GraphPlot, etc... VisibleListener: [1×1 event.proplistener]. Code: a = linspace(0,2*pi); y = sin(a); plot(a,y) hold on y1 = sin(2*a); plot(a,y1) legend('sin(a)','sin(2*a)') Output: In the above example, the legend for the two lines is shown in the top right corner of the plot, one line depicting the values for the function sin(a) and the other line depicting the values for the function sin(2a). them either at artist creation or by calling the drawnow; Here’s a working example: figure; hold all; Anyway, once we have this object reference(s), we can modify its/their properties. The custom dictionary mapping instances or types to a legend numel(plots)),1,2),ones(numel(plots)*2,1),2)) The code above is also generalized for more the one data series, although I guess that there are cases where this will fail to give the right solution and will need some fine tunings. In addition, note that hLegend.EntryContainer.NodeChildren(1).Icon.Transform.Children.Children returns an array of objects (Marker and LineStrip) and you can only set the Size property of the Marker, not the LineStrip (duh). The pad between the axes and legend border, in font-size units. Whether round edges should be enabled around the FancyBboxPatch which % The following in the callback function: The call signatures correspond to three different ways how to use ignored. Line (data1) The fontsize of the legend's title. Example #3 Next, what if we don’t want our labels to be on the top right but in some other place on the plot. Default is None, which means using rcParams["legend.shadow"] (default: False). Today I will expand on that article by explaining the plot legend’s internal graphics hierarchy, how we can access each of these components, and then how this information could be used to customize the separate legend components. If "inherit", use take rcParams["axes.edgecolor"] (default: 'black'). Legend for multiple plots. Learn more about legend, plot, graph For example, plot three lines and return the “Line” objects as array “p”. The string 'best' places the legend at the location, among the nine locations defined so far, with the minimum overlap with other drawn artists. 27. Create a script file and type the following code − x = [0:5:100]; y = x; plot(x, y) When you run the file, MATLAB displays the following plot − Let us take one more example to plot the function y = x 2. Automatic detection of elements to be shown in the legend. Share. ColorBinding: 'object' Related course. If shadow is activated and framealpha is None, the default value is legend creates a legend with descriptive labels for each plotted data series. 1) Set the 'DisplayName' property of each plot. The string 'best' places the legend at the location, among the nine default font size. PeerVisible: 'on' This argument is only used if prop is not specified. legend text, and 1.0 is at the top. AmbientStrength: 0.3 Parent: [1×1 Group] Learn more about plot, plotting, legend MATLAB If so, then please share it in a comment below. You will have to play with the legend's position to achieve the desired look. Entries are due June 1, 2020. This handler_map updates the default handler map For example: hLegend.ItemTokenSize == [10,1]; % shrink legend icons and labels. Visible: 'on' Plot data from matrix with legend name. 3. Use this together with handles, if you need full control on what A list of labels to show next to the artists. 1 ⋮ Vote. corner of the legend in axes coordinates (in which case bbox_to_anchor LayoutInfo: [1×1 matlab.graphics.illustration.legend.ItemLayoutInfo] The issue here is that the first plot already contains four data sets. The font properties of the legend. >> hLegend.PlotChildren I have some problems using legend in a plot. Let us plot the simple function y = x for the range of values for x from 0 to 100, with an increment of 5. In this article we will show you some examples of legends using matplotlib. You can return the Legend object as an output argument from the legend function, such as lgd = legend.Then, use lgd with dot notation to set properties, such as lgd.FontSize = 14. Visible: 'on'. line, = ax.plot([1, 2, 3]) line.set_label('Label via method') ax.legend() Specific lines can be excluded from the automatic legend element selection by defining a label starting with an underscore. Plot Legend. Legend for several matrix plots. Icon: [1×1 LegendIcon] For example, to put the legend's upper right-hand corner in the artists. Add a legend with a description for each chart. The spacing between columns, in font-size units. PickableParts: 'visible' Accepted Answer: jiro. Plot legend customization – Matlab plot legends and their internal components can be customized using a variety of undocumented properties that are easily accessible. When I use legend it somehow shows dots for both plots when it has to show dots for the first plot and a line for the second. The titlecommand allows you to put a title on the graph. HitTest: 'off' Notice too that the legend only lists plot elements that have a … HandleVisibility: 'on' In my example above, hLegend.EntryContainer.NodeChildren(2).Object == hLine1, and hLegend.EntryContainer.NodeChildren(2).Object == hLine1. For some reason, accessing the displayed graphic line in LegendEntry‘s Icon is not simple. OverlayAlpha: 0.65 Follow 284 views (last 30 days) Jason on 7 Apr 2011. numel(plots)),1,2),ones(numel(plots)*2,1),2)) The code above is also generalized for more the one data series, although I guess that there are cases where this will fail to give the right solution and will need some fine tunings. 9,323 16 16 gold badges 66 66 silver badges 111 111 bronze badges. Defaults to axes.bbox (if called as a method to Axes.legend) or If they are not, they are truncated to the smaller length. Thanks for pointing it out. Browse other questions tagged matlab plot matlab-figure legend or ask your own question. Learn more about plotting MATLAB The legend function will return as its second output argument handles for all of the components that make up the symbols and text in the legend. Default is 1. quadrant of the axes (or figure): A 2-tuple (x, y) places the corner of the legend specified by loc at Plotting a Legend on a Graph. 5. transAxes transform will be used. selection by defining a label starting with an underscore. You could call plot() 3 times with different variables and call legend and have all variable names show up in the legend.