[R] resclaing/resampling data

[Jim Lemon]

Jan M. Wiener wrote:
> hello,
> I am trying to rescale a matrix according to one column in the matrix.
> Imagine having two matrices with 2 columns each:
> 
> mat1:
> 1    2.1  
> 2    2.2
> 3   2.2
> 4   2.4
> 5     2.7
> 6   2.9
> 
> mat2:
> 1    1.9  
> 2    2.0
> 3   2.1
> 4   2.2
> 5     2.4
> 6   3.0
> 7.  2.8
> 
> I now want to rescale mat2 such that the values in columns 1 are also
> between 1 and 6 (as in mat1). Of, course the values in column 2 should
> be rescaled accordingly (simple interpolation).
> Are there any predefined functions in R that does such rescaling?

Hi Jan,

library(plotrix)
newmat1<-rescale(mat1,c(1,6))
newmat2<-rescale(mat2,c(1,6))

Jim