Checking the decimal numbers

Question

inga 2012-11-9

0
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https://ww2.mathworks.cn/matlabcentral/answers/53309-checking-the-decimal-numbers

I have a matrix A with one column (5000x1). I want to make an if statement, which would check ONLY the decimal numbers of each row and continue with an action, if it is true. Something like this:

for i=1:5000
  if decimals of A(i)=.59333 then ...
end

Is there a simple way of controlling only the decimals? Sorry for this way of writing the code, but I didn't know how else to describe it. Thanks in advance!

Ingvar

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Jan 2012-11-9

编辑：Jan 2012-11-9

Does "decimal" mean "fractional part"?

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Answer 1

Evan 2012-11-9

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编辑：Evan 2012-11-9

在 MATLAB Online 中打开

mod(A(i),1)

Should tell you whether or not each element is a decimal number. If it returns a nonzero answer, you have a decimal.

So your code would look something like this:

for i = 1:5000
   if mod(A(i),1)
      % Your operations here
   end
end

The "modulus after division" function can also operate on vectors so, depending on what you need to do in the case of a decimal number, you could maybe even eliminate your looping altogether.