# How can I split an array of float point numbers in two different arrays based on a dot (.) delimiter?

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Abdulatif Alabdulatif on 15 Apr 2014
Edited: Walter Roberson on 15 Apr 2014
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.

Walter Roberson on 15 Apr 2014
Edited: Walter Roberson on 15 Apr 2014
Aint = fix(A);
Adecimals = (abs(A) - abs(Aint)) * sign(A);
Or
T = rem(A, 1);
Aint = A - T;
If the numbers are certain to be non-negative then you can use
Aint = floor(A);
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

Chandrasekhar on 15 Apr 2014
numbers can be converted into strings using 'num2str' command and they can be splitted using 'strtok' command
Walter Roberson on 15 Apr 2014
num2str() uses a default format that might not be suitable -- though you can specify a format as the second parameter.
regexp() with the 'split' option can also be used to split strings.