Index in position 1 is invalid. Array indices must be positive integers or logical values.

ctx= 0:5
choices= 1:3
bi= 1:18
n= 0
z= 0
 
for i= 1:length(ctx)
    trialsInContext=find(cellfun(@(x)(x.contexts== n), trialrec));
        n= n+1
        for j= 1:length(choices)
            sum(cellfun(@(x)(x.choice== j), {trialrec{trialsInContext}}))
                length(trialsInContext)
                numChoicesThisBandit = sum(cellfun(@(x)(x.choice== j), {trialrec{trialsInContext}}));
                numChoicesThisBandit/length(trialsInContext)
                z= z+1
                bar(bi, pc(ctx(i), choices(j)));
                bi= bi+1;
                hold on
             
        end 
end 

Answer 1

[Kevin Phung]

this line may be the cause:

                bar(bi, pc(ctx(i), choices(j)));

because for i = 1, ctx(1) = 0.

you cant index pc at the 0th value.