MATLAB: How to get an x,y location on an image by clicking on it

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I am trying to make a program which makes use of x,y positions on an image. It is user assisted and therefore needs to allow for the user to click on an image with their mouse, and for the program to read the xy location where the mouse was clicked. Could someone provide some information on how to do this?

Best Answer

Have a look at ginput.

Related Solutions

MATLAB: Load x,y

Try this:

x = 1:10;
y1=[0.5 1.7 1.75 1.9 2 2.1 2.4 2.6 2.7 2.9 ]
y2=[0.7 1.8 1.9 2 2.3 2.5 2.7 2.8 2.9 3]
save('XYvectors.mat','x','y1','y2')
D = load ('XYvectors.mat');
x = D.x;
Y1 = D.y1;
y2 = D.y2;

Use whatever file name you want.

See the documentation for the plot function.

MATLAB: Interpolation x,y from time

Use interp1 and pass both the x and y columns to interpolate both at the same time:

I call your matrix ‘M’ here:

M = [31977674  200  195
31978007  204  198
31978341  200  195
31978674  200  195
31979008  200  195
31979341  201  196
31979674  201  196
31980008  202  196
31980341  202  196
31980674  203  196];
xynew = interp1(M(:,1), M(:,2:3), 31979000)

produces:

xynew =
     200   195

The values on either side of it aren’t changing, so it has the same values as its immediate neighbors. (I had a bit of a problem at first because there was a zero missing from your interpolation point.)

For two points between x and y values that are changing, the results are a bit more apparent:

xynew = interp1(M(:,1), M(:,2:3), [31978225; 31979225])

produces:

xynew =
     201.3892   196.0419
     200.6517   195.6517

Best Answer

Related Solutions

MATLAB: Load x,y

MATLAB: Interpolation x,y from time

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