[R] separating the integer part of a number from the fractional part

[Peter Dalgaard]

csrc2010 wrote:
> I have columns of decimal numbers (representing fraction day of year). I need
> to separate the fractional part of the number (to the right of the radix
> point) from the integer part. For example, if the number were '207.65' Id
> like to make a separate column which contained only '65' or even better,
> '0.65.' What I am trying to do is separate day from night. Any ideas??
> Thanks.
> -JPG

> 207.65 %%1
[1] 0.65
> 207.65 - trunc(207.65)
[1] 0.65
> 207.65 - floor(207.65)
[1] 0.65

Notice differences for negative numbers though:

> -207.65 %%1
[1] 0.35
> -207.65 - trunc(-207.65)
[1] -0.65
> -207.65 - floor(-207.65)
[1] 0.35



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