Clear Filters
Clear Filters

drawfreehand in App Designer ?

9 views (last 30 days)
moon215 on 15 May 2019
I want to add a freehand draw in my app, with :
d = drawfreehand(app.UIAxes_1,'color','green');
But i have this error:
Error using images.roi.internal.ROI/parseInputs
ROI parent must be a valid Axes object.
Error in images.roi.Freehand
So how can i use drawfreehand in App Designer ?
Thanks a lot in advance.

Accepted Answer

Saumya Goel
Saumya Goel on 23 May 2019
At this time, the "drawfreehand" function only takes an 'axes' objects as an argument, not 'UIAxes', the type of axes that are used in App Designer. More information about the valid arguments for 'drawfreehand' can be found on this documentation page:
Stanley Strawbridge
Stanley Strawbridge on 8 Aug 2019
So is there a way to draw a roi on an image in the UIAxes in App designer?
Sean de Wolski
Sean de Wolski on 8 Aug 2019
See my answer below.

Sign in to comment.

More Answers (1)

Sean de Wolski
Sean de Wolski on 8 Aug 2019
It's kind of silently supported but you can programmatically (>=R2018b) add an axes to a uifigure and then draw* will work.
ax = axes('Parent', uifigure)
Andrew Keefe
Andrew Keefe on 12 Feb 2021
Is this with the latest version? I'm running R2020A.
Narendra Narisetti
Narendra Narisetti on 30 Mar 2021
Hi, I am also looking for sam solution. When I use uiaxes matlab taing long time and not responding. @Sean de Wolski, could you provide a solution how to develop free hand on ap designer?

Sign in to comment.


Find more on Develop uifigure-Based Apps in Help Center and File Exchange




Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!