[R] Embedding lists in matrices and matrices in lists

Michael Kogan michael.kogan at gmx.net
Tue Aug 18 10:48:10 CEST 2009


I'm new to programming, new to R and even new to mailing lists so please 
be patient with me. I need to manage many matrices generated by an R 
program. These matrices have different dimensions and I'd like to group 
them somehow. The best way would be to have a big matrix (let's call it 
database) where every element database[x,y] consists of a list of 
matrices that all have the dimensions ncol(matrix1)=x and 
nrow(matrix1)=y. So those matrices have to be embedded into lists and 
the lists have to be embedded in the big database matrix. If I simply try


I get

    Error in database[4, 4] = c(matrix1, matrix2) :
      number of items to replace is not a multiple of replacement length
    Execution halted

which makes sense of course... Is there any possibility to make this 
work? Or maybe there is a better way to organize those matrices?


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