How do I make and export a brushed area from a figure

How do I make and export a brushed area from a figure

Answer 1

[Adam Danz]

Turn on brushing

To turn on brushing, press the brush icon in the axes toolbar or called the brush command: brush on.

Interactively extract brushed points

To interactively extract the brushed data points, right click a brushed data point and select "Export Brushed" from the context menu. A window will appear asking for a variable name to store in the workspace.

Programmatically export brushed points

Graphics objects contain a BrushData property that uses logical indexing to specify which coordinates in the object have been brushed. For example, if a scatter object has 5 coordinates and you brushed coordinates #2 and #3, then its BrushData property will be [0 1 1 0 0]. This can be used to index the Data properties. Here's an example.

s = scatter(rand(1,10), rand(1,10)); 
brush on

Select some coordinates

brushIdx = s.BrushData; 

x = s.XData(brushIdx); 
y = s.YData(brushIdx);