How to read more than 1 table?

Question 1) I want to read many csv-tables and run the same commands for
all of them. Is there some simpler solution than this below to solve this
problem?


for (g in 1:6)
{

if (g==1){k="kt1_0057"}
if (g==2){k="kt1_0101"}
if (g==3){k="kt1_0613"}
if (g==4){k="staten"}
if (g==5){k="tenpenny"}
if (g==6){k="fiddrunk"}

TABLE=read.table(paste("/home/user/",k,".csv",sep=""),sep = ",",
na.strings=".",header=F,fill=TRUE);

put your filenames in a character vector filenames:
filenames <- paste( c("kt1_0057", ...), ".csv", sep="")
tables  <- lapply( filenames, function(x) read.table(file=x, na.strings= 
..., ...) )

and if you want to repeat the same task for your six tables do it with 
lapply()  or  sapply()

print(TABLE)

}

Question 2) Is it possible to create new variables for example with the
assistance of for-loop without initialising them beforehand?

This way:
    sapply(1:10, function(i) your.task(i) )

sapply() will do the initialization for you!

Kjetil

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for (k in list.files()){
...
}
best
S??ren

________________________________

Fra: r-help-bounces at stat.math.ethz.ch p?? vegne af Atte Tenkanen
Sendt: ma 20-02-2006 22:40
Til: r-help at stat.math.ethz.ch
Emne: [R] How to read more than 1 table?



Question 1) I want to read many csv-tables and run the same commands for
all of them. Is there some simpler solution than this below to solve this
problem?


for (g in 1:6)
{

if (g==1){k="kt1_0057"}
if (g==2){k="kt1_0101"}
if (g==3){k="kt1_0613"}
if (g==4){k="staten"}
if (g==5){k="tenpenny"}
if (g==6){k="fiddrunk"}

TABLE=read.table(paste("/home/user/",k,".csv",sep=""),sep = ",",
na.strings=".",header=F,fill=TRUE);

print(TABLE)

}

Question 2) Is it possible to create new variables for example with the
assistance of for-loop without initialising them beforehand?

______________________________________________
R-help at stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html