Subsetting a matrix by row.names
Just in case someone's include_list is class list (rather than vector), then this is modification of Rich Scriven's answer that works in such case based on this. unlist()
should be added:
m <- matrix(1:30, 6, 5)
rownames(m) <- c("X1", "X5", "X33", "X37", "X52", "X566")
include_list <- list("X1", "X5", "X33")
m[unlist(include_list), ]
Set up some fake data:
m <- matrix(1:30, 6, 5)
rownames(m) <- c("X1", "X5", "X33", "X37", "X52", "X566")
m
# [,1] [,2] [,3] [,4] [,5]
# X1 1 7 13 19 25
# X5 2 8 14 20 26
# X33 3 9 15 21 27
# X37 4 10 16 22 28
# X52 5 11 17 23 29
# X566 6 12 18 24 30
Here it's probably easiest to subset with matrix indexing ([
):
include_list <- c("X1", "X5", "X33")
m[include_list, ]
# [,1] [,2] [,3] [,4] [,5]
# X1 1 7 13 19 25
# X5 2 8 14 20 26
# X33 3 9 15 21 27
Alternative with subset()
function:
subset(m, rownames(m) %in% include_list)
# [,1] [,2] [,3] [,4] [,5]
# X1 1 7 13 19 25
# X5 2 8 14 20 26
# X33 3 9 15 21 27
This also seems to work:
include_list <- head(read.csv("/Users/histelheim/include_list.csv", header = FALSE))
include_list <- c(do.call("cbind", include_list))
data[row.names(data) %in% include_list, ]