Create a black line in imagesc plot

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Eric
Eric 2015-12-27
回答： Image Analyst 2015-12-27
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

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回答（2 个）

harjeet singh
harjeet singh 2015-12-27
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 2015-12-27
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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