Category: Graph legend example

graph legend example

When a graph includes several markers or line styles, it is often useful to create a legend that explains the relationship between the data and the symbols, color, and line styles in the graph.

However, sometimes it is useful to override the procedure's default choices. This article describes five tips that you can use to customize the content and placement of legends.

Add a legend to a chart

The tips are:. If the information in the default legend is redundant, and you might want to suppress it. For example, the following legend is unnecessary because the title explains the data and the regression line.

graph legend example

In some graphs that overlay multiple components, some components are self -explanatory and do not need to appear in the legend.

For example, the following statements create a graph that consists of a scatter plot, a confidence ellipse, and a regression line. However, I can never remember which option controls which attribute! Therefore, I created a mnemonic, which I hope will help you remember, too:. The following graph is the same as in the previous example, except that the location of the legend is inside the graph area and the position of the legend is in the lower-right corner.

Three situations come to mind:. You also might want to customize the items that appear in the legend in order to combine, for example, marker and line attributes. A situation where this comes up is when you want to overlay a group of curves on a scatter plot. It is a "super customization" statement that gives you complete control over the legend items. I want the legend to show not only the colors and patterns of the regression lines but also the marker symbols for each group:.

Leave a comment! His areas of expertise include computational statistics, simulation, statistical graphics, and modern methods in statistical data analysis.

Before it came along, we had a number of tricks like packing the legend title with additional legend information. This is so much better! You might use annotation or some other method to put something additional in a graph, and the default legend does not quite convey what you want. Another important technique is available in attribute maps. Again, we resorted to trickery to achieve this in the old days. But what if I want to get a scatter where at the point 1,2 'A' is printed and at the point 3,4 'B" is printed and so on.

Tags Statistical Graphics Tips and Techniques. Warren Kuhfeld on December 14, am. Rick, I really like your last example for several reasons.The chart legend contains descriptions for each category in a chart.

A legend always contains one or more legend items, where each legend item consists of a colored box that represents the series, and a text string that describes the series, as indicated in the following illustration. A legend item is connected to an individual series on the chart, except for Shape charts, where the legend is connected to individual data points. The chart automatically adds items into the legend based on the series that are generated from your data.

You can format a legend by using the Legend Properties dialog box or by using the Properties pane. Right-click the legend and click Legend Properties to change values for the legend text, background color, borders, and 3D effects.

To change values for the legend title, select the legend, right-click the legend title, and click Legend Title Properties. You can create and modify paginated report definition. Each authoring environment provides different ways to create, open, and save reports and related items.

Series are ordered in the legend according to the order that they are processed by the Reporting Services processing engine. You can change the order by changing the order of fields in the data fields drop-zone. If you are using series grouping, the series data is not known until processing, so that there is no way for you to re-order these items.

The changes can be seen in Preview. You can hide any series from being shown in the legend. If you are using series grouping, all series related to the data field will be hidden. When a field is placed in the data field drop-zone of a chart, a legend item is automatically generated that contains the name of this field. By default, the text of each legend item is taken from the name of the data field. Every legend item is connected to an individual series on the chart with the exception of Shape charts, where the legend is connected to individual data points instead of individual series.

When a category group is defined on a Shape chart, the text of each legend item is taken from the string representation of the category group. You can specify custom label text for pie, doughnut and funnel charts to show information other than the category group label that relates to each individual data point in the legend.

To do this, select the legend and specify legend text in either the Series Properties dialog box or the LegendText property in the Properties pane. You can also specify chart-specific, case-sensitive keywords for commonly referenced attributes in the LegendText property or in the Series Properties dialog box. The chart control replaces these keywords at run time with their data representation.The legend of a graph reflects the data displayed in the graph's Y-axis, also called the graph series.

This is the data that comes from the columns of the corresponding grid report, and usually represents metrics. A graph legend generally appears as a box to the right or left of your graph. The box contains small samples of each color on the graph as well as a short description of what each color means.

A graph legend is a common component of any graph report, because it helps the analyst understand what the colors and shapes in the graph mean in terms of your data. As you format your graph, you may find that you need to make a graph legend visible or format it. Steps are below for displaying, hiding, and formatting a graph legend in both MicroStrategy Developer and MicroStrategy Web. If a graph legend does not already appear on your graph report, display it using the following steps.

Some graph types such as Histogram and 3D Surface do not use graph legends. Selecting to display a legend for these types of graphs has no effect on the graph. These types of graphs use other titles and labels to provide context for data.

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The procedure below describes how to format a graph using the Format: Graph dialog box in MicroStrategy Web. This dialog box contains all formatting options for a graph. As an alternative, you can quickly format a graph by right-clicking the graph component and selecting a formatting option.

You can also format the graph using the Formatting toolbar, which is available from the View menu. Also, you cannot apply gradients, transparency effects, or bevel effects.

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All Files. Did you find this helpful? Thanks for taking the time to give us some feedback. The instructions are confusing or unclear. The instructions didn't work. Thanks for your feedback. Want to tell us more? Send us an email to leave your feedback. Waren Ihnen die Informationen hilfreich? Warum waren diese Informationen nicht hilfreich? Anweisungen waren verwirrend oder unklar.The characteristics are as follows:. The following figure illustrates the terms associated with the various parts of a legend.

When the syntax of an option includes unitsuse one of these:. If you omit unitsa unit specification is searched for in this order:. The color of the frame is the first color in the color list. The thickness of the line increases directly with thickness-factor. Text-argument s defines the appearance or the text of a legend label, or both.

NONE suppresses the legend label. In that case the default label is "PLOT". Text-argument s can be one or more of these:. Enclose each string in quotes. Separate multiple strings with blanks.

Text-description-suboption can be as follows:. See Text Description Suboptions for complete descriptions. Specify as many text strings and text description suboptions as you want, but enclose them all in one set of parentheses. A blanking area is a protected area in which no other graphics elements are displayed.

If the legend is positioned over elements of the graph itself, both graphics elements and legend elements are displayed.

To set only the x offset, specify one value, with or without a following comma:. To set both the x and y offset, specify two values, with or without a comma separating them:.

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To set only the y offset, specify one value preceded by a comma:. The way you specify value-list depends on the type of variable that generates the legend:. For numeric variables, value-list is either an explicit list of values, or a starting and an ending value with an interval increment, or a combination of both forms:. If a numeric variable has an associated format, the specified values must be the unformatted values. For character variables, value-list is a list of unique character values enclosed in quotes and separated by blanks:.

If a character variable has an associated format, the specified values must be the formatted values. It is possible to run a legend off the page or overlay the graph.The legend configuration is passed into the options.

The global options for the chart legend is defined in Chart. The legend label configuration is nested below the legend configuration using the labels key. Items passed to the legend onClick function are the ones returned from labels. These items must implement the following interface.

The following example will create a chart with the legend enabled and turn all of the text red in color. It can be common to want to trigger different behaviour when clicking an item in the legend. This can be easily achieved using a callback in the config object. Lets say we wanted instead to link the display of the first two datasets.

We could change the click handler accordingly. Now when you click the legend in this chart, the visibility of the first two datasets will be linked together. Sometimes you need a very complex legend. In these cases, it makes sense to generate an HTML legend. Charts provide a generateLegend method on their prototype that returns an HTML string for the legend. To configure how this legend is generated, you can change the legendCallback config property.

Note that legendCallback is not called automatically and you must call generateLegend yourself in code when creating a legend using this method. Legend Configuration The chart legend displays data about the datasets that are appearing on the chart.

Configuration options The legend configuration is passed into the options. Name Type Default Description display boolean true Is the legend shown? This is unlikely to need to be changed in day-to-day use. Options are: 'top' 'left' 'bottom' 'right' Align Alignment of the legend. Options are: 'start' 'center' 'end' Defaults to 'center' for unrecognized values. Legend Label Configuration The legend label configuration is nested below the legend configuration using the labels key.

See Legend Item for details. Receives 2 parameters, a Legend Item and the chart data. Legend Item Interface Items passed to the legend onClick function are the ones returned from labels. No results matching " ". Marks that this box should take the full width of the canvas pushing down other boxes.

A callback that is called when a 'mousemove' event is registered on top of a label item. A callback that is called when a 'mousemove' event is registered outside of a previously hovered label item. Generates legend items for each thing in the legend. Filters legend items out of the legend.

Label style will match corresponding point style size is based on the mimimum value between boxWidth and fontSize.Origin supports four legend objects and two scale objects. This page focuses on legend objects. For information on scale objects, see Color Scales and Bubble Scales. The graph legend is a special text object that is automatically created on the graph page.

The legend object is given a specific name -- "Legend" -- and programmatically linked to your Origin project data using LabTalk notation. You will not see this notation unless you are editing the legend object. Normally, what displays is the "translated" symbol and legend text.

graph legend example

This image of a typical legend's Object Properties dialog box shows the LabTalk notation in the center of the dialog and the "translated" legend symbol and legend text -- what you actually see on the graph page -- in the lower part of the dialog. It is generally preferable to use plot-associated metadata in combination with dialog box settings, to create the legend symbol and text.

For information on how to set that up, see:. However, you are not limited to programmed legends. At times, a manual edit of the legend object is the quickest way to get the job done. Since the legend is a text object, you can edit it using methods common to all text objects:. Double-clicking on the graph legend symbol opens the Plot Details dialog box. Before proceeding to customize the data plot legend, you should know the difference between "updating" a legend and "reconstructing" a legend: Updating will preserve your customizations, reconstructing will not.

You can actively update or reconstruct the legend using shortcut menu commands Update Legend or Reconstruct Legend or by clicking the Reconstruct Legend toolbar button but be aware that there is also a Legend Update Mode setting at the page level in the graph's Plot Details dialog box. If you are adding or removing data plots from your graph, know that you could overwrite legend customizations if this control is set to Reconstruct The four types of legend objects can co-exist in one graph.

For example, you may have multiple Y datasets and plot them as a box chart. However, you would like to show both the data plot legend and the box chart component legend. OriginLab Corp. All rights reserved. Notes: To make the legend text color follow the legend symbol color such as : Set the font color as Auto on the Format toolbar or right-click the legend to select the Properties from the context menu to set the color to Auto in the Object Properties dialog.

All Books. Origin Help. Graph Legends. User Guide. Quick Help.

Legend Configuration

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Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. As you can see, this is a very basic use of matplotlib 's PyPlot. This ideally generates a graph like the one below:. Nothing special, I know. However, it is unclear what data is being plotted where I'm trying to plot the data of some sorting algorithms, length against time taken, and I'd like to make sure people know which line is which.

Thus, I need a legend, however, taking a look at the following example below from the official site :. You will see that I need to create an extra variable ax.

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How can I add a legend to my graph without having to create this extra variable and retaining the simplicity of my current script? You can access the Axes instance ax with plt. In this case, you can use. However, if you need to access the Axes instance more that once, I do recommend saving it to the variable ax with.

Add labels to each argument in your plot call corresponding to the series it is graphing, i. Then simply add Pyplot. You can add a custom legend documentation. Learn more.

Google Sheets Charts - Advanced- Data Labels, Secondary Axis, Filter, Multiple Series, Legends Etc.

Asked 6 years, 6 months ago. Active 12 days ago. Viewed k times.

graph legend example

This ideally generates a graph like the one below: Nothing special, I know. Games Brainiac Games Brainiac I am confused by your concern of creating an extra variable.

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You have to make those objects behind the scenes anyway. I do not want to create extra variables, because it adds complexity to the whole script. I'm trying to teach this to a bunch of students, and since they have't used matplotlib before, I wanted to keep things as simple as possible.

Also, if you take a look at Rob's answer, its far simpler than the example shown on the website.