How to check an array for max and min values

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Alexander West
Alexander West 2019-2-24
评论： Walter Roberson 2019-2-25
function [shallow,deep] = marinaraTrench(arrayz)
min=realmax;
max=0;
for i=1:size(arrayz)
if arrayz(i)>max
max=arrayz(i)
end
if arrayz(i)<min
min=arrayz(i)
end
end
shallow=min
deep=max
end
I'm trying to find the max and minimum values of an array using for loops alone and for some reason it's not always returning the right values

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采纳的回答

Walter Roberson
Walter Roberson 2019-2-24
You should be looping to numel() of the array, not to size() of the array. size() returns a vector of values, so your for loop becomes for i=1:VECTOR . MATLAB defines that as being the same as for i=1:VECTOR(1) which would be for i=1:size(arrayz,1) .
Note: using variables named max and min is going to confuse readers. At if you get into the habit of using those as variable names, you can be 99% sure that at some point, you are going to confuse yourself heavily in some program where you use them as variable names but then expect the functions with those names to work properly.
  1 个评论
Alexander West
Alexander West 2019-2-25
oh, okay thanks! i couldn't understand why size/length wouldn't work, but thank you, I get it now!

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