Function that returns value after decimal point?

Is there a function that returns the value after the decimal?

EX:

a = 2.876

function(a) = 0.876

Thank You

Answer 1

[Jan]

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

[sono]

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.

Answer 2

[Azzi Abdelmalek]

out=a-fix(a)

%or

A=num2str(a);
out=str2num(['0' A(strfind(A,'.'):end)])

[Jan]

What happens for integer values?

[Azzi Abdelmalek]

 a=1
 a-fix(a)=0

and

 A=num2str(a);
 out=str2num(['0' A(strfind(A,'.'):end)])=0