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a_matrix
2008 Jul 09
2
replacing value in column of data frame
...chromosome X was correct by trying
BAF_X <- BAF_temp[BAF_temp[,1]=="X",]
which worked to give me a data frame with only the rows of the X chromosome.)
I then thought it might work better if I changed the data frame to a matrix.
When I change the BAF_temp data frame into a matrix (by BAF_matrix <- as.matrix(BAF_temp)), then the command I used above:
BAF_temp[,1][BAF_temp[,1]=="X"] <- 23
works fine and the end result is as I meant it to be, with all the X's changed into 23's.
However, by using as.matrix all columns are changed to 'character' including the nu...