R help - Sep 2009 - Filling Empty Column with String in read.table

I have a data file that looks like this.

__DATA__
D7KAR5Z02F447V  176 G   0.22
D7KAR5Z02J3WLG  94  A   1.05    29
D7KAR5Z02F4K6L  198 a   0.13
D7KAR5Z02J4SYO  67  C   0.95    28
D7KAR5Z02J4SYO  83  C   1.01    29
D7KAR5Z02J4SYO  97  T   0.13
D7KAR5Z02J4SYO  166 A   0.94    27


I want the rows where the last column has no-entry to be filled
with "-".

Is there a way to do it with read.table?
I don't find any option to do it with read.table.

This only fill the empty 5th column with blank.

dat <-
read.table("myfile.txt",na.strings="-",header=FALSE,fill=T);

G.V.

Try this after read the data file:

dat[is.na(dat[,5]),5] <- '-'

On Thu, Sep 17, 2009 at 3:33 AM, Gundala Viswanath <gundalav at gmail.com>
wrote:
> I have a data file that looks like this.
>
> __DATA__
> D7KAR5Z02F447V ?176 G ? 0.22
> D7KAR5Z02J3WLG ?94 ?A ? 1.05 ? ?29
> D7KAR5Z02F4K6L ?198 a ? 0.13
> D7KAR5Z02J4SYO ?67 ?C ? 0.95 ? ?28
> D7KAR5Z02J4SYO ?83 ?C ? 1.01 ? ?29
> D7KAR5Z02J4SYO ?97 ?T ? 0.13
> D7KAR5Z02J4SYO ?166 A ? 0.94 ? ?27
>
>
> I want the rows where the last column has no-entry to be filled
> with "-".
>
> Is there a way to do it with read.table?
> I don't find any option to do it with read.table.
>
> This only fill the empty 5th column with blank.
>
> dat <-
read.table("myfile.txt",na.strings="-",header=FALSE,fill=T);
>
> G.V.
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>


-- 
Henrique Dallazuanna
Curitiba-Paran?-Brasil
25? 25' 40" S 49? 16' 22" O