R-在for循环内创建数据帧

Question

I have hardcoded this:

s79t5 <- read.csv("filename1.csv", header = TRUE)
s81t2 <- read.csv("filename2.csv", header = TRUE)
etc.

subsets79t5 <- subset(s79t5, Tags!='')
subsets81t2 <- subset(s81t2, Tags!='')
...
subsets100t5 <- subset(s100t5, Tags!='')

now i need to softcode it. i am almost there:

sessions <- c('s79t5', 's81t2', 's88t2', 's90t3', 's96t3', 's98t4', 's100t5')

for (i in 1:length(sessions)) {
    jFileName <- c(as.character(sessions[i]))
    j <- data.frame(jFileName)
    subset <- subset(j, j$Tags!='')
    assign(paste("subset", jFileName, sep = ""), data.frame(subset))
}

Answer 1

Just throwing an answer here to close this question. Discussion was in the comments.

You need the get function in your line: j <- data.frame(jFileName)

It should be: j <- as.data.frame(get(jFileName))

The get function looks in your existing objects for the string character you gave it (in this case, jFileName ) and returns that object. I then make sure it is a data frame with as.data.frame .

Previously you were essentially telling R to make a data frame out of a character string. With get you are now referencing your actual dataset.