You can interactively explore and edit plotted data to improve the visual display of the data or reveal additional information about the data. The interactions available depend on the contents of the axes, but typically include zooming, panning, rotating, data tips, data brushing, and restoring the original view.
Some types of interactions are enabled by default, while other types of interactions are only available through the axes toolbar. The toolbar appears at the top-right corner of the axes when you hover over it.
In R2018a and previous releases, the interaction options appear in the figure toolbar instead of the axes toolbar. Also, in previous releases, none of the interactions are enabled by default.
Zooming, panning, and rotating the axes let you explore different views of your data. By default, you can use the scroll-wheel to zoom in and out of the view of the axes. Also, you can click and drag the axes to pan the axes (2-D view) or rotate the axes (3-D view).
You can enable more interactions by clicking the zoom in , zoom out , pan , and rotate icons in the axes toolbar. For example, click the zoom-in icon if you want to drag a rectangle to zoom into a region of interest.
To help identify the x, y, and z values of a data point, use data tips. Data tips appear when you hover over a data point. If you want the data tip to persist, select the data tips icon in the axes toolbar. To create more than one data tip, use the Shift key.
You can data brushing to select, remove, or replace individual data values. To brush data, select the data brushing icon from the axes toolbar. Click a data point to highlight it or drag a rectangle to highlight all the data points within the rectangle. Use the Shift key to highlight additional data points.
After you highlight the desired data points, you can use the options in the
right-click context menu to remove, replace, or copy the values. The displayed plot
shows your changes. Also, you see the updates to the data properties of the plotted
object update (such as
XData). However, the original workspace
variables are not updated. Then, if you want to update the workspace variables as
well, you can use the Link option on the figure
Tools menu to link the variables to the plot.
This example shows how to use data brushing to delete an outlier from a plot of 100 data points.
First, plot the data containing a single outlier. Then, select the data brushing icon from the axes toolbar and drag a rectangle around the outlier.
x = linspace(0,10); y = exp(.1*x).*sin(3*x); y(60) = 2.7; plot(x,y)
Right-click the brushed data point and select Remove from the context menu. Notice that the plot updates. However, the workspace variable does not change.
If you want to remove the point from the workspace variable, then select the Link option from the figure Tools menu before brushing the data.
You can modify plots interactively by using the Property Inspector. When you open the
Property Inspector and select a plot, the inspector displays a list of properties
that you can edit. To open the inspector, use the
function or click the Property Inspector icon on the figure toolbar.