Vector from loop - stop after x numbers of iterations

Hi,

I have this loop here:

n_trial = 12;
n_probe =7;
longer_array = [1:96];
updated_probeNum_withinBlock=0;
for trial = 1:n_trial
    for probe = 1:n_probe
       probeNum_withinBlock=longer_array((trial-1)*n_probe+probe+updated_probeNum_withinBlock); %index into your longer_array
    end
    probeNum_withinBlock= (probeNum_withinBlock+1);
    updated_probeNum_withinBlock= (1+updated_probeNum_withinBlock);
end

I need a similar vector to "probeNum_withinBlock" but that stops after the 48th iteration (e.g., I need this vector to be a 1 x 48 array, from 1 to 48). It seems that I cannot find the correct way to do this.

Any help would be very much appreciated.

[Walter Roberson]

    for probe = 1:n_probe
       probeNum_withinBlock=longer_array((trial-1)*n_probe+probe+updated_probeNum_withinBlock); %index into your longer_array
    end

That appears to be overwriting all of probeNum_withinBlock every iteration, so the final result would be the same as if you had only done for probe = n_probe . Perhaps the desired output variable should be updated_probeNum_withinBlock ? Something looks wrong with the logic.

[Walter Roberson]

probeNum_WithinBlock is a scalar in the above code, so I am not clear as to what you are asking for?

Are you saying that you want to store the results of probeNum_WithinBlock, except that you want to stop recording after probe #7 of trial #6 ? since 6*nprobe+7 == 48 ?

[Mikel Jimenez]

Hi Walter, I'm afraid I didn't explain myself clearly. Yes, I'd like to create a new vector that stops at the end of trial 6, as you say. Thanks

[Walter Roberson]

Each trial does nprobe=7 iterations. 6 trials would be 6*7=42 iterations, 7 trials would be 7*7 = 49 iterations. Do you need to stop recording after probe 6 of trial 7?

[Mikel Jimenez]

Sorry, that would be 7*7, yes.

[Walter Roberson]

n_trial = 12;
n_probe =7;
longer_array = [1:96];
updated_probeNum_withinBlock=0;
for trial = 1:n_trial
    for probe = 1:n_probe
       probeNum_withinBlock=longer_array((trial-1)*n_probe+probe+updated_probeNum_withinBlock); %index into your longer_array
       if trial <= 7
           probe_record(probe,trial) = probeNum_withinBlock;
       end
    end
    probeNum_withinBlock= (probeNum_withinBlock+1);
    updated_probeNum_withinBlock= (1+updated_probeNum_withinBlock);
end
probe_record = probe_record(:);  %make it a vector

But unless n_trial is a lot larger than the cutoff point (7), most people would simply record all of the outputs and then later throw away the ones they do not need.

[Mikel Jimenez]

Thanks a lot