setColor

Set color used to draw ROI object

setColor is not recommended. With the new ROIs, set the value of the Color property instead. For more information, see Compatibility Considerations.

Syntax

setColor(h,color)

Description

setColor(h,color) sets the color used to draw the ROI object h.

Examples

Set Color of Polygon ROI

Display an image. Draw a polygon on the image, specifying the location of five vertices.

imshow('gantrycrane.png')
h = impoly(gca,[188,30; 189,142; 93,141; 13,41; 14,29]);

Set the color of the polygon to yellow.

setColor(h,'yellow');

Input Arguments

h — ROI object

imellipse | imfreehand | imline | impoint | impoly | imrect

ROI object, specified as an imellipse, imfreehand, imline, impoint, impoly, or imrect object.

color — RGB color value

3-element numeric vector | predefined color name

RGB color value, specified as a 3-element numeric vector, or the long or short name of a predefined color, such as 'white' or 'w'. See ColorSpec for a list of predefined colors.

Compatibility Considerations

setColor is not recommended

Not recommended starting in R2018b

Starting in R2018b, a new set of ROI objects replaces the existing set of ROI objects. The new objects provide more functional capabilities, such as face color transparency. The new classes also support events that you can use to respond to changes in your ROI such as moving or being clicked. Although there are no plans to remove the old ROI objects at this time, switch to the new ROIs to take advantage of the additional capabilities and flexibility. For more information on creating ROIs using the new ROI functions, see ROI Creation Overview.

To set the color of the new ROIs, set the value of the Color property.

Update Code

Update all instances of setColor.

Discouraged Usage	Recommended Replacement
This example creates an ROI and uses setColor to specify the color of the ROI. imshow('cameraman.tif'); h = imrect(gca,[10 10 100 100]); setColor(h,'yellow');	Replace the ROI with the equivalent new ROI object. Then, delete the call to setColor and set the value of the Color property of the ROI. imshow('cameraman.tif'); h = drawrectangle(gca,'Position',[10 10 100 100]); h.Color = 'yellow'