MATLAB: How to split an array of float point numbers in two different arrays based on a dot (.) delimiter

Question

Hi all,

I try to spilt an array of float point numbers in two different arrays based on a dot (.) delimiter but it does not work. I do the following steps:

1- Convert an array of float point numbers to be as a string.

2- spilt a string based on a dot (.) delimiter.

This is not work and shows the following error:

Error using strsplit (line 80) First input must be a string.

Error in decompose (line 8) C = strsplit(str,'.');

Sorry if there is any spelling errors. I am beginner in Matlab.

Thanks in advance!

Answer 1

Aint = fix(A);
Adecimals = (abs(A) - abs(Aint)) * sign(A);

Or

T = rem(A, 1);
Adecimals = abs(T);
Aint = A - T;

If the numbers are certain to be non-negative then you can use

Aint = floor(A);
Adecimals = mod(A,1);

Note: if you are expecting that (for example) 3.14 would split into 3 and 14, then you have the problem that 3.14 is the same as 3.140 which would visually split into 3 and 140 instead. You would also have problems with the fact that 0.1 is not exactly representable in binary floating point, so 0.14 is actually represented internally as 0.14000000000000001332267629550187848508358001708984375