On 2011-12-12 1:16, Patrick Burns wrote:
You are basically in R Inferno Circle 8.1.40.

http://www.burns-stat.com/pages/Tutor/R_inferno.pdf


Thanks.

R_inferno is a good material for me. In this document, there is several sections titled "string not the name". I try try to change

get(paste("a.", i, sep = ""))[i] <- i+50

to

assign(get(paste("a.", i, sep = ""))[i], i+50)

however, error message:

Error in assign(get(paste("a.", i, sep = ""))[i], i + 50) :
  invalid first argument

I don't know why...

Regards,
Jinsong


On 11/12/2011 15:27, Jinsong Zhao wrote:
Hi there,

I hope to modify values in a vector or matrix in the following code:

for (i in 1:9) {
assign(paste("a.", i, sep = ""), 1:i)
get(paste("a.", i, sep = ""))[i] <- i+50
}

I get the following error message:

Error in get(paste("a.", i, sep = ""))[i] <- i + 50 :
target of assignment expands to non-language object

I have read the FAQ "How can I turn a string into a variable?", however,
I don't find a way to deal with:

get(paste("a.", i, sep = ""))[i] <- i+50

Any suggestions? Thanks in advance!

Regards,
Jinsong


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