Thanks, that did the trick.
  -- D

jim holtman <jholtman@gmail.com> wrote:
  Here is one way. You might want to read in the data with 'as.is=TRUE'
to prevent conversion to factors.

> x <- data.frame(a=c(1,2,3,'.',5,'.'))
> str(x)
'data.frame': 6 obs. of 1 variable:
$ a: Factor w/ 5 levels ".","1","2","3",..: 2 3 4 1 5 1
> # replace '.' with zero; either readin with 'as.is=TRUE' or convert to character
> x$a <- as.character(x$a)
> x$a[x$a == '.'] <- '0'
> x$a <- as.numeric(x$a)
> str(x)
'data.frame': 6 obs. of 1 variable:
$ a: num 1 2 3 0 5 0
>
>


On 9/5/07, Dieter Best wrote:
> Hello,
> I read in a tab delimited text file via mydata = read.delim(myfile). The text file was originally an excel file where . was used in place of 0. Now all the columns which should be integers are factors. Any ideas how to change all the . to 0 and factors back to integer?
> Thanks a lot in advance for any suggestions,
> -- D
>
>
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-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?


       
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