[R] Changing a value in a particular row and column within a text file

Duncan Murdoch murdoch.duncan at gmail.com
Fri Dec 17 10:53:20 CET 2010

Mauricio Zambrano wrote:
> Dear list,
> I need to change a value within a particular line of a plain text file
> with characters and numbers, and I haven't found any way of doing this
> by using R.
> What I have a is a file that doesn't have tabular data (so, I think
> that 'read.table' or 'read.delim' are not the right tools for this),
> but some text, and I now exactly the row that has to be modified and
> the columns within that row that have to be changed with a new
> numerical value.
> I don't' know any way of reading a text file line by line in R, and
> this is the only solution in R that I have figured out so far...
> Any idea about how can I do this ?.

Use readLines to read it, modify the line, use writeLines to write it 

Duncan Murdoch

> Thanks in advance for any help,
> Mauricio

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