Function that returns value after decimal point?

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sono
sono 2012-10-4
Is there a function that returns the value after the decimal?
EX:
a = 2.876
function(a) = 0.876
Thank You

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Jan
Jan 2012-10-4
编辑：Jan 2012-10-4
a = 2.876
b = mod(a, 1)
What is the wanted output for negative numbers? REM might be helpful:
x = -3.14;
mod(x, 1) % 0.86
rem(x, 1) % -0.14
abs(rem(x)) % 0.14
mod(abs(x), 1) % 0.14
  1 个评论
sono
sono 2012-10-7
Thanks. I was using this to calculate the relative 0-2pi angle from one greater then 2pi.
Negative angles were important because it was for quadrant identification and if angle is negative you have to spin around origin in opposite direction so keeping the sign was important. To make the function work the same way for negative angles I just used:
-mod(abs(a),1)
Making it positive so mod(a,1) function would work in right direction then re-adding the negative sign.

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Azzi Abdelmalek
Azzi Abdelmalek 2012-10-4
编辑：Azzi Abdelmalek 2012-10-4
out=a-fix(a)
%or
A=num2str(a);
out=str2num(['0' A(strfind(A,'.'):end)])

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