How can I write a loop that performs a function to each element in a vector?

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Eden Crespo
Eden Crespo 2017-12-3
评论： Star Strider 2024-10-4
say I have a vector with numbers 234 456 687 643 23 45 and have a function which can only take one value at a time. How would I loop to call the function to each one of the values individually?

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Star Strider
Star Strider 2017-12-3
Ideally, you would write your function so that it would allow vectorized operations.
If that is not an option try something like this:
Result = zeros(1:length(vector)); % Preallocate
for k1 = 1:length(vector)
Result(k1) = YourFunction(vector(k1));
end
The length call could be replaced by size (with the appropriate dimension argument), or numel. They all have their appropriate uses, depending on your array.
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Ameerh
Ameerh 2024-10-4
Write a program in MATLAB using for loop read all the elements of the vector and print them.
Star Strider
Star Strider 2024-10-4
@Ameerh — Do exactly that. If you have problems, post a new Question with your code and describe the problem you are having with it.
I will not do your homeework for you!

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Stephen23
Stephen23 2017-12-3
编辑：Stephen23 2017-12-3
Either use a for loop or arrayfun:
vec = [234,456,687,643,23,45];
arrayfun(@fun,vec)
You might also like to read this:
https://www.mathworks.com/help/matlab/matlab_prog/vectorization.html
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Stephen23
Stephen23 2017-12-3
@Eden Crespo: your function returns non-scalar output arguments. Simply read the error message and do exactly what it states, that will solve the problem:
arrayfun(@fun,vec,'UniformOutput',false)

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