MATLAB: How to call any element of array

arrayerrorif statement

I have a code where I want to define an arugment "If any element of the array is 0 then return error"

Best Answer

If x is your array, then

any(x(:)==0)

will return logical true if any elements are zero.

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MATLAB: Help Calling a Function

You can't start out myHW7.m with these lines:

function constant = reaeration(array)
function resultarray = deOxygen(array , constant)

Those are function definitions which you define later in the m-file. So you're basically doing it twice and the first time you define them there's not even any body to the function. So, I assume you just want to call them, but to call them you need a function line with myHW7 in it:

function myHW7()
    load PollutionData.txt;
    array = PollutionData(:,1);
    timearray = (0:.5:250);
    % Now call (not define) the functions
    constant = reaeration(array)
    resultarray = deOxygen(array , constant)
      return
% Now define other functions like reaeration() and deOxygen()

MATLAB: Summing elements of any vector using a for loop

No need for both adder and S. Simply have this:

function S = mySum(X)
% MYSUM  Sum of elements
% S = mySum(X) is the sum of the elements of the vector or array X.
% Works for X of any number of dimensions and sizes.
S = 0;
for k = 1 : numel(X)
  S = S + X(k);  
end

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Related Solutions

MATLAB: Help Calling a Function

MATLAB: Summing elements of any vector using a for loop

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