How to iterate a for loop starting from the previous element?

I want to plot this signal (inv_norm) within this range [o_previous; o]. I have tried to use these lines code, but I have this error ( "Array indices must be positive integers or logical values"), because Matlab doesn't count from 0.

for i= 1 : length(times_2r)
        ind33 = times_2r(i);
        o = find(times_biceps == ind33);
        o_previous = find(times_biceps == times_2r(i-1));
        inv = inv_norm(o_previous:o);
        figure;
        plot(inv);
    end

Answer 1

[Gaurav Garg]

Hi Enrica,

You should recheck lines 3 and 4 (o = find(times_biceps == ind33); o_previous = find(times_biceps == times_2r(i-1));). The documentation tells that output of find function is a matrix. However, array indices can only be positive and logical values.

So, I would recommend you to rewrite the lines 3 and 4, or rewrite line 5 to run over a loop for each value in o_previous and o.