Hello,
You're calling your dataset 'data' and 'df' in the same instruction,
hence the error. (Even if you were to call it different names in
different instructions...)
Also, both 'data' and 'df' are really bad names for objects, they're
already are R functions. Name your dataset something else. And be
consistent in the use of that name.
Hope this helps,
Rui Barradas
Em 16-10-2012 09:08, siddu479 escreveu:
Hi All,
I have a data frame where nearly 10K columns of data, where most of them
have standard deviation( of all rows) as zero.
I want to exclude all the columns from the data frame and proceed to further
processing.
I tried like blow.
*data <- read.csv("data.CSV", header=T)
for(i in 2:ncol(data))
if(sd(data[,i])==0){
df[,i] <-NULL
}
*
where I have the data columns from 2:ncol, but getting the error "Error in
df[, i] <- NULL : object of type 'closure' is not subsettable"
Can any one suggest the right method to accomplish this.
-----
Sidda
Business Analyst Lead
Applied Materials Inc.
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