vector product and sum not working

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Apple 2017-2-8

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/324048-vector-product-and-sum-not-working

评论： James Tursa 2017-2-8

I have a function that I have created that does a lot of calculations with a single random vector.

function [ vec_below_12_5, new_vec, rev_vec, difference ] = calc( vec )
vec_below_12_5=sum(vec>=1 & vec<=12.5);
%counts vectors between 1 and 12.5;
new_vec=vec.^min(vec);
%vector to the power of the lowest element;
rev_vec = fliplr(vec);
%flips vector
vecprod = prod(vec);
vecsum = sum(vec);
difference = vecprod-vecsum;
%difference between the product and sum of a vector;
histogram(vec);
ylabel('frequency');
xlabel('number');
legend('output arguments');
title('graph for vec');
%creates histogramm for vectors
end

however, when I run it in the command window it doesn't give me a single value for the difference vecprod-vecsum it simply copies the original vector. I couldn't find the problem so I ran it as a separate function and it gives me the single value.

does anyone know why it won't run in the above function but will in a separate function.