MATLAB Answers

How to select a rectangle on a graph?

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Alon Rozen
Alon Rozen on 6 Nov 2016
Commented: KSSV on 7 Nov 2016
Hi everyone :)
I cannot use the image processing toolbox function 'getrect' which lets you draw a rectangle on a graph and get its information (min X, min Y, width and length). I don't have the toolbox and it will take long time to get hold of it. I want to have this ability using standard Matlab only. How to do that?
Any help will be welcomed and appreciated, Alon

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Answers (1)

KSSV
KSSV on 6 Nov 2016
doc imrect.

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KSSV
KSSV on 6 Nov 2016
Then go for ginput. doc ginput.
Alon Rozen
Alon Rozen on 7 Nov 2016
Thanks again, KSSV. Unfortunately, ginput requires to hold the execution until a respond is received. Also it is not a rectangle but a set of points. I need something which is similar to the way a preson use the + tool to enlarge part of the graph. Thanks anyway.
KSSV
KSSV on 7 Nov 2016
How about this?
clc; clear all ;
plot(rand(10,1))
rectangle('Position',[0.59,0.35,3.75,1.37],...
'LineWidth',2,'LineStyle','-')
You can change position, length and width.
Other option is. You can insert rectangle on the figure, go to insert > Rectangle. You can drag drop, adjust it's position, length and width. Then you can call ginput to get positions.

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