How can I make the x and y labels start at the origin?

This is my code to plot a matrix with imagesc:

imagesc(f);

set ( gca, 'ydir', 'normal' )

colorbar

ticks=[0:12.5:100];

xticks(ticks);

xticklabels({100:100:800});

yticks(ticks);

yticklabels({10:10:80});

--- I want the axis to start in the origin with x=100 and y=10 but it start to write labels one xtick later. How can I fix that? I want to have my first tick label in the origin and with a value of x=100, y=10.

Answer 1

[Cris LaPierre]

The issue is that you are specifying your first tick to be at 0. Image X and Y values come from the column and row indices of the array, respectively. MATLAB does not use an index of 0. It starts at 1. Therefore, your first tick is getting skipped. Start your ticks at one instead.

Also note that you have specified 9 tick locations but only 8 labels.

Z = 10 + peaks(100);
imagesc(Z)
set ( gca, 'ydir', 'normal' )
colorbar

ticks=linspace(1,100,8);
xticks(ticks);
xticklabels({100:100:800});
yticks(ticks);
yticklabels({10:10:80});

[Al Gut]

That solves the issue, thanks!