MATLAB: How to do this with a while loop script

while loop

I allow the user to input their own vector. Then my script shows the vector as a decimal number but with the integers as zeros. I now want my if statement showing if the vector has one or more numbers that are not integers as an incorrect input. I know how to get the script to display "incorrect input" but how would I get the part showing if the vector has one or more numbers that are not integers?

Best Answer

Use isinteger() which returns 0/1 for each element of the vector.

https://www.mathworks.com/help/matlab/ref/isinteger.html

Then use any() to detect if there are any integers.

any(isinteger(vec))

Note that this does not and should not be done in a loop.

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MATLAB: How to use a while loop to check if user input is an integer

The while loop will continually ask for a non-zero even integer until one is entered.

prompt= 'enter non zero even integer '
z = 0;
while z=0 || mod(z,2)~=0
    z= input(prompt)
end

If you'd like to avoid negative numbers, too,

while z<=0 || mod(z,2)~=0

MATLAB: Matlab confirm is input is not an array

n = input('Enter in a positive integer: ')
while n<0 | numel(n)>1 | fix(n)~=n
  n = input('Enter in a positive integer: ')
end

Best Answer

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MATLAB: How to use a while loop to check if user input is an integer

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