R: characters

hi all

assume that i have the following table

a=rbind(c(T,T,F),c(F,F,T))

a

     [,1]  [,2]  [,3]
[1,]  TRUE  TRUE FALSE
[2,] FALSE FALSE  TRUE

I would like to change all the FALSE entries to a blank. how can i 
do
this?

i could simply use

a[a==F]=""
a

but then how would i remove the " " from the entries.

i know that this should be very easy!!!

/
allan

you could convert it to a data.frame, i.e.,

a <- rbind(c(T, T, F), c(F, F, T))
a[!a] <- ""
as.data.frame(a)


I hope it helps.

Best,
Dimitris

----
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/16/336899
Fax: +32/16/337015
Web: http://www.med.kuleuven.be/biostat/
    

----- Original Message ----- 
From: "Clark Allan" <Allan at stats.uct.ac.za>
To: <r-help at stat.math.ethz.ch>
Sent: Wednesday, August 17, 2005 12:35 PM
Subject: [R] R: characters

hi all

assume that i have the following table

a=rbind(c(T,T,F),c(F,F,T))

a

     [,1]  [,2]  [,3]
[1,]  TRUE  TRUE FALSE
[2,] FALSE FALSE  TRUE

I would like to change all the FALSE entries to a

blank. how can i 

do
this?

i could simply use

a[a==F]=""
a

but then how would i remove the " " from the

entries.

i know that this should be very easy!!!

/
allan

Hmm, it seems that the only difference is the use of
"as.data.frame(a)" instead of "a". Hence, the same
result can be done with:

a <- rbind(c(T, T, F), c(F, F, T))
a[a==F]=""
as.data.frame(a)

a[!a]<-""
noquote(a)