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Concatenate Two Matrices in R | Append Matrix Object | rbind & rbind.fill.matrix [plyr] Functions
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R code of this video:
mat1 ＜- matrix(1:12, ncol = 3) # Create first example matrix
mat1 # Print first example matrix
mat2 ＜- matrix(21:35, ncol = 3) # Create second example matrix
mat2 # Print second example matrix
mat_combined1 ＜- rbind(mat1, mat2) # Apply rbind function
mat_combined1 # Print concatenated matrix
mat3 ＜- matrix(41:56, ncol = 4) # Create third example matrix
mat3 # Print third example matrix
rbind(mat1, mat3) # rbind function leads to error
# Error in rbind(mat1, mat3) :
# number of columns of matrices must match (see arg 2)
library("plyr") # Load plyr package
mat_combined2 # Print concatenated matrix
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mat1 ＜- matrix(1:12, ncol = 3) # Create first example matrix
mat1 # Print first example matrix
mat2 ＜- matrix(21:35, ncol = 3) # Create second example matrix
mat2 # Print second example matrix
mat_combined1 ＜- rbind(mat1, mat2) # Apply rbind function
mat_combined1 # Print concatenated matrix
mat3 ＜- matrix(41:56, ncol = 4) # Create third example matrix
mat3 # Print third example matrix
rbind(mat1, mat3) # rbind function leads to error
# Error in rbind(mat1, mat3) :
# number of columns of matrices must match (see arg 2)
library("plyr") # Load plyr package
mat_combined2 # Print concatenated matrix
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