Concatenating Matrices in R

Question

How can I concatenate matrices of same columns but different number of rows  For example  I want to concatenate a   dim a    15 7000   and b  dim b    16 7000  and I want the result to be a matrix of 31 rows by 7000 columns  Can I do this for matrices of different rows and columns   Say I want to combine a matrix of 15 rows and 7000 columns with another of 16 rows and 7500 columns  Can I create one dataset with that

User · Answer

cbindX from the package gdata combines multiple columns of differing column and row lengths  Check out the page here   http   hosho ees hokudai ac jp  kubo Rdoc library gdata html cbindX html  It takes multiple comma separated matrices and data frames as input    You just need to   install packages  gdata   dependencies TRUE   and then  library gdata  concat data  lt - cbindX df1  df2  df3    or cbindX matrix1  matrix2  matrix3  matrix4

User · Answer

Sounds like you re looking for rbind    gt  a lt -matrix nrow 10 ncol 5   gt  b lt -matrix nrow 20 ncol 5   gt  dim rbind a b    1  30  5   Similarly  cbind stacks the matrices horizontally   I am not entirely sure what you mean by the last question   Can I do this for matrices of different rows and columns

[r] Concatenating Matrices in R

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