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Create a black line in imagesc plot

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Eric
Eric on 27 Dec 2015
Answered: Image Analyst on 27 Dec 2015
Hi everybody,
I've created a 15x15 plot with the boxes showing different colors ranging from dark blue to dark red depending on the connection between x and y. I've been using imagesc.
My question is: Is there a way to make a completely black line across the plot in like (1,1), (2,2), (3,3) and so on?
Best regards,
Eric

Answers (2)

harjeet singh
harjeet singh on 27 Dec 2015
hello Eric you may use this code
a=500;
img(1:a,1:a)=5;
figure(1)
imagesc(img);
hold on
b=1:a;
plot(b,b,'k');
drawnow
hold off

Image Analyst
Image Analyst on 27 Dec 2015
If you want the line in the overlay above the image, you can simply use line() or plot().
If you want the line "burned into" the image, you can follow my attached demo.

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