How can i save the output of " imagesc " as the exact resolution ?

I am doing some image processing and as a result i got a matrix with values between -1 and 1. I am presenting the matrix using "imagesc". this code for example is giving the same result:

 x1=linspace( 0,360 ,1024)*pi/180;
x2=2.*x2;
x=[x1 ;x2];
y = cos(repmat(x,1280/2,1));
ax=figure; imagesc(y);colorbar;colormap(ax,jet)

I want to save the image exactly as it presented using "imagesc" with the source resolution [1024 X 1280]. I have been tried this solution (but it did not work):

 (from: https://stackoverflow.com/questions/18265592/save-exact-image-output-from-imagesc-in-matlab)et(gca,'XTick',[]) % Remove the ticks in the x axis!
set(gca,'YTick',[]) % Remove the ticks in the y axis
set(gca,'Position',[0 0 1 1]) % Make the axes occupy the hole figure
saveas(gcf,'Figure','png')
saveas(gcf,'Figure','png')

I need to save it as is it with the same resolution for future analysis and show

Thank you

Marwan

Answer 1

[Rik]

Look into imwrite (you might need ind2rgb first).