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? Thanks for any answers, Jan -- Dr. Jan M. Wiener LPPA - Coll?ge de France - CNRS 11, place Marcelin Berthelot 75005 Paris, France - e-mail: mail at jan-wiener.net url: www.jan-wiener.net phone: +33 (0)1 44 27 14 21
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