plot does not display anything using hold on

Hello

I try to plot inside a loop, using the hold on function.

this is my script:

figure;

for i = 1:128
    for j = 1:128
        for k=1:scans_amount
            plot(TE(1:end),squeeze(pix_value_mat(i,j,k))); hold on;
        end
    end
end

and the figure does not show anything. I wanted to choose the default plot coloring so that every graph will be displayed in a different color.

Answer 1

[Sriram Tadavarty]

Hi Dekel,

The way you are accessing pix_value_mat indicates it could be a scalar. If there a single value plotted over the values, then, the output will be blank. It would be good to know that the values or dimensions of TE and pix_value_mat.

You can try this,

plot(TE(1:end),squeeze(pix_value_mat(i,j,k)),'*'); hold on;

The above will confirm, if it is a scalar value that it is accessing in the plot.

Hope this helps.

Regards,

Sriram