Displaying 6 results from an estimated 6 matches for "df_".
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2013 Apr 25
1
Looping through names of both dataframes and column-names
Hello all,
This seems like a pretty standard question - suppose I want to loop through
a set of similar data-frames, with similar variables, and create new
variables within them:
nl<-seq(1,5)for (i in nl) {
assign(paste0("df_",nl[i]),data.frame(x=seq(1:10),y=rnorm(10)))}
ls()[grep("df_",ls())]
nls<-ls()[grep("df_",ls())]for (df in nls) {
print(df)
for (var in names(get(df))) {
print(var)
assign(paste0(df,"$",paste0(var,"_cs")),cumsum(get(df)[[var]]))
}}
ls()[...
2010 Jan 10
2
data frame names in sequence
I've been stuck with this problem for a whole afternoon. It's silly but
totally pissed me off. I have a set of data frames with names in a sequence:
df_1, df_2, df_3, ..., df_20. Now I want to access each data frame (read or
write) in a for loop, in a way something like this:
for (i in 1:20) {
df_i <- ######
length(which(df_i[,7]==1))
######
}
I tried paste or cat ("df_", i, sep=""). But neither way works. Your help i...
2017 May 02
1
Any progress on write.csv fileEncoding for UTF-16 and UTF-32 ?
...> "UTF-16LE", "UTF-16BE", "UTF-16",
> "UTF-32LE", "UTF-32BE", "UTF-32"
> )
>
> df <- data.frame (x = 1:2, y = 3:4)
>
> csv <- structure (lapply (ENCODING, function (encoding) {
> csv <- sprintf ("df_%s.csv", encoding)
> write.csv (df, csv, fileEncoding = encoding, row.names = FALSE)
> list (default.eol = list (
> csv = csv, raw = readBin (csv, "raw", 1000))
> )
> }), .Names = ENCODING)
>
> EOL <- c (LF = "\n", CR = "\r", "...
2017 May 02
0
Any progress on write.csv fileEncoding for UTF-16 and UTF-32 ?
...CODING <- c (
"UTF-8",
"UTF-16LE", "UTF-16BE", "UTF-16",
"UTF-32LE", "UTF-32BE", "UTF-32"
)
df <- data.frame (x = 1:2, y = 3:4)
csv <- structure (lapply (ENCODING, function (encoding) {
csv <- sprintf ("df_%s.csv", encoding)
write.csv (df, csv, fileEncoding = encoding, row.names = FALSE)
list (default.eol = list (
csv = csv, raw = readBin (csv, "raw", 1000))
)
}), .Names = ENCODING)
EOL <- c (LF = "\n", CR = "\r", "CR+LF" = "\r\n")...
2017 May 01
3
Any progress on write.csv fileEncoding for UTF-16 and UTF-32 ?
On 30/04/2017 12:23 PM, Duncan Murdoch wrote:
> No, I don't think anyone is working on this.
>
> There's a fairly simple workaround for the UTF-16 and UTF-32 iconv
> issues: don't attempt to produce character vectors, produce raw vectors
> instead. (The "toRaw" argument to iconv() asks for this.) Raw vectors
> can contain embedded nulls. Character vectors
2003 Dec 01
0
No subject
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