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I have the scatter diagram and I want the coordinates of each point

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Ang Vas
Ang Vas 2015-6-4
评论： Ang Vas 2015-6-4
What I want is, if I have the scatter diagram, how can I take the coordinates of each and every point in a matrix or in a vector?
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Ang Vas
Ang Vas 2015-6-4
编辑：Image Analyst 2015-6-4
sorry for all that mesh. Well the scatter I have it from the below code
axis ij
hold on
while any(A(:) > 0)
[r,c] = find(A>0);
offx = randn;
offy = randn;
scatter(c+offx,r+offy,'.', 'b')
A = A-1;
end
but I can't understand how to find the x,y coordinates of each point
luc
luc 2015-6-4
Could you add some sample A data? It seems to me the
scatter(c+offx,r+offy,'.', 'b')
line contains the X and Y data. So X_new and Y_new becomes:
New_X=c+offx;
New_Y=r+offy;

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回答（1 个）

Image Analyst
Image Analyst 2015-6-4
How did you generate the picture? If it was via MATLAB, then why don't you know the coordinates already?
Maybe this will help: http://www.mathworks.com/matlabcentral/fileexchange/36904-matlab-script-for-digitizing-a-published-graph
Or else, call ginput() or impoints(). You will also have to click on the start and stop of the x and y axes so that you can locate the origin and a spatial calibration factor.

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