CODEWITHSUNDEEP
r
Ajay
Ajay

Reputation: 795

Populating data frame through loop in R

I am trying to populate data frame through loop. I succeeded for a certain extent but not able to bind that loop within a function

iterations = 34
variables = 6
v_log <- matrix(ncol=variables, nrow=iterations)

for (i in 1:34)
{
    v_log[i,]<-c(1,"c1", "c2","c3", "c4", "c5")
}
v_log1=as.data.frame(v_log)

but when I am trying to bind them within the function, 

f1<- function() {

iterations = 34
variables = 6
v_log <- matrix(ncol=variables, nrow=iterations)

for (i in 1:34)
{
    v_log[i,]<-c(1,"c1", "c2","c3", "c4", "c5")
}
v_log1=as.data.frame(v_log)
}

On the execution of function, like f1() nothing will populate.

Please help.

Upvotes: 1

Views: 687

Answers (1)

IRTFM
IRTFM

Reputation: 263481

It looks like it should produce a result. You need to assign the output of f1 to a named object or it will just be garbage collected. Welcome to functional programming. You have left the SAS/SPSS macro-processor domain:

> test <- f1()
> str(test)
'data.frame':   34 obs. of  6 variables:
 $ V1: Factor w/ 1 level "1": 1 1 1 1 1 1 1 1 1 1 ...
 $ V2: Factor w/ 1 level "c1": 1 1 1 1 1 1 1 1 1 1 ...
 $ V3: Factor w/ 1 level "c2": 1 1 1 1 1 1 1 1 1 1 ...
 $ V4: Factor w/ 1 level "c3": 1 1 1 1 1 1 1 1 1 1 ...
 $ V5: Factor w/ 1 level "c4": 1 1 1 1 1 1 1 1 1 1 ...
 $ V6: Factor w/ 1 level "c5": 1 1 1 1 1 1 1 1 1 1 ...

Upvotes: 1

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