I want to transform my matrix origin from top left corner (showed in Red color in the plot) to bottom left corner (showed as purple color).
I have already implemented
So, it is not just about visualization but I want to do the transformation so that the second plot would flip too resulting in upper half to be positive (as the displacement is towards the top) and bottom half to be negative as the displacement is downwards for that. I need to further process the data based on the normal Cartesian coordinate system.
I have looked at the rotation matrix and different other articles online but could not figure out how exactly to implement this.
[rows,cols] = size(imread('test1_0000.tif'));
ref = NaN(rows,cols);
X = datafile(:,1); Y = datafile(:,2);
idnx = sub2ind(size(ref),Y,X);
ref(idnx) = datafile(:,3);
ax = pcolor(ref); colormap((parula))
axis ij tight equal;colorbar
ax.LineStyle = 'none';ax.EdgeColor = 'flat';ax.FaceColor = 'flat';