How can i plot a structure array?

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Fabio Castro
Fabio Castro 2016-4-8
编辑： Stephen23 2016-4-8
Hello all,
I have a structure array containing multiple trials. I would like to plot the singl trials, but change the trials with the arrows (so that I don't have to give the single command). I wrote this code:
for b= 1:length(fields_trials)
plot (Trials.(['a_' int2str(a)]));
end;
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Fabio Castro
Fabio Castro 2016-4-8
Sorry, I forgot to write what happened. It plotted only the first trial. My structure is like Trials.a_1, Trials.a_2, ect.
Stephen23
Stephen23 2016-4-8
编辑：Stephen23 2016-4-8
@Fabio Castro: rather than using dynamic fieldnames, you should consider using a non-scalar structure. Using a non-scalar structure will make your code much simpler:
S(1).trial = [1,2,3];
S(2).trial = [4,5,6];
S(3).trial = [7,8,9];
Then accessing the contents of the structure is really simple:
>> S(1).trial % one element
ans =
1 2 3
>> vertcat(S.trial)
ans =
1 2 3
4 5 6
7 8 9
And you can use indexing to access any elements of the array:
>> vertcat(S([false,true,true]).trial)
ans =
4 5 6
7 8 9
Using a non-scalar array would make your code simpler, faster, and less buggy. You shoudl try it.

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回答（1 个）

Walter Roberson
Walter Roberson 2016-4-8
编辑：Walter Roberson 2016-4-8
for b= 1:length(fields_trials)
plot (Trials.(['a_' int2str(a)]));
hold on
end
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Walter Roberson
Walter Roberson 2016-4-8
Is there to be one subplot per field? Or do you want something like a waterfall plot?
Fabio Castro
Fabio Castro 2016-4-8
Hello Walter,
Yes, I need to be able to plot a trial each time, and be able to go through one by one using the keyboard. This because I need to see if there is any error in the trial. The code you have sent me plots all the trials at the same time.
I hope I have express myself better.
Thank you very much for your help!

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