problem reading a txt file

I am reading a txt file into R and trying to do take the log of the data. The txt file has columns of data with the first row having text headers and the rest numeric data.

data=read.delim( "data.txt", sep = "\t", row.names = 1)

I get the following error when I do this:

Error in :
non-numeric variable(s) in data frame: tumor1, tumor2, tumor3, tumor4, normal1, normal2, normal3


To help us help you, could you please prepare a reproducible example (reprex) illustrating your issue? Please have a look at this guide, to see how to create one:

Generally speaking you dont do numerical transformations directly on dataframes, but on the specific columns of dataframes.

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