wait

R2026b

Block MATLAB command line until ROI operation is finished

Syntax

wait(ROI)

Description

wait(ROI) blocks execution of the MATLAB^® command line until the operation on the ROI object ROI completes. Indicate completion by double-clicking the ROI object.

Examples

Use wait to Pause the Command Line

Read an image into the workspace.

I = imread('pout.tif');

Display the image.

imshow(I)

Create an ROI on the axes. Click and drag the mouse to create the rectangular ROI.

roi = drawrectangle;

At the command line, view the value of the Position property of the ROI.

roi.Position

ans = 1×4

    57.0000    146.0000    141.0000    87.0000

Call the wait method of the ROI. This blocks the command line until an operation on the ROI completes. For example, you can move the ROI, reshape it, or rotate it (if you have enabled rotation). For this example, position the cursor inside the ROI, click and drag the ROI over the image to a new location. To indicate completeness, double-click the ROI.

wait(roi)

Back at the command line, check the value of the ROI's Position property. You can see that the values have changed to represent the new position.

roi.Position

ans = 1×4

    15.0000    20.0000    141.0000    87.0000

Input Arguments

ROI — Region of interest

ROI object

Region of interest, specified as an ROI object of one of the types listed in this table.

AssistedFreehand	Line
Circle	Point
Crosshair	Polygon
Cuboid	Polyline
Ellipse	Rectangle
Freehand

Version History

Introduced in R2019b