How do I scale the data to overlap on the image?

I calculated data from some processes.

the data is 127 X 127

using that data I drew the plot

Then the plot has 127 X 127

But I want to overlap the data plot with picture that is 1024x1024 resolution

So I tried to make a code

figure(1);

imshow('1.jpg') % 1.jpg is 1024 X 1024

hold on;

[c, h]=contour(z,'k') % z is 127X127 data

when I tried that code

the result is far from what I want

the contour plot is located on the left-top occupying 127X127

remaining region is not affected by contour plot.

I want to magnify contour plot to cover 1024 X 1024 image.

How do I do to solve my problem?

Answer 1

[Image Analyst]

How about just multiplying all the coordinates by 1024/127?

[Seungyong]

multiplying all the coordinates?

how do I multiplying all the coordinate by 1024/127?

I don't know how to multiply that

[Image Analyst]

coordsScaled = coordinates * 1024/127;