Re: [R] R is converting arg input to scientific notation, which is bad!
On 20 Jun 2014, at 04:30 , David Winsemius dwinsem...@comcast.net wrote: I think it's your `digits = 0` argument: formatC(20, digits = 3, width = 3, flag = 0) [1] 020 At any rate, sprintf() is often more convenient: sprintf(%03d.csv, c(30, 104, 223)) [1] 030.csv 104.csv 223.csv -- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Email: pd@cbs.dk Priv: pda...@gmail.com __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] R is converting arg input to scientific notation, which is bad!
The digits argument for formatC is for sigfigs. I found a solution within the formatC argument list. When I added the format arg to formatC: filenames - paste0(formatC(id, digits = 0, width = 3, format = d, flag = 0), .csv) ..it miraculously worked. d is the format value for integers. Hope someone else can learn from this! -- View this message in context: http://r.789695.n4.nabble.com/R-is-converting-arg-input-to-scientific-notation-which-is-bad-tp4692389p4692459.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] R is converting arg input to scientific notation, which is bad!
Hello,
Firstly, real new to R here.
I have a function intended to evaluate the values in columns spread over
many tables. I have an argument in the function that allows the user to
input what sequence of tables they want to draw data from. The function
seems to work fine, but when the user inputs a single number (over 9)
instead of a sequence using the : operator, I find an error message:
the input for this example is 30
Error in file(file, rt) : cannot open the connection
5 file(file, rt)
4 read.table(file = file, header = header, sep = sep, quote = quote, dec =
dec, fill = fill, comment.char = comment.char, ...)
3 FUN(specdata/3e+01.csv[[1L]], ...)
2 lapply(filepaths, read.csv)
1 pollutantmean(specdata, nitrate, 30)
In addition: Warning message:
In file(file, rt) : cannot open file 'specdata/3e+01.csv': No such file or
directory
*The problem is that when a single number (30, 104, 223) is input, it's
being stored as 3e+01 and no longer corresponds with the .csv file I'm
trying to call (030.csv).*
Below is my code:
pollutantmean - function(directory, pollutant, id = 1:332){
filenames - paste0(formatC(id, digits = 0, width = 3, flag = 0), .csv)
filepaths - file.path(directory, filenames)
list_of_data_frames - lapply(filepaths, read.csv)
big.df-do.call(rbind,list_of_data_frames)
print(str(big.df))
mean(big.df[,pollutant], na.rm=TRUE)
}
I'm curious if formatC() is converting the number to scientific notation or
is that the default for R if there is no sequence when there could be.
Many of you probably recognize this as a coursera assignment. It's beyond
the due date and I've submitted some (pretty not good) code for it. I just
want to have a good understanding of what's going on here, as this type of
work is directly related to my research.
--
View this message in context:
http://r.789695.n4.nabble.com/R-is-converting-arg-input-to-scientific-notation-which-is-bad-tp4692389.html
Sent from the R help mailing list archive at Nabble.com.
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] R is converting arg input to scientific notation, which is bad!
On Jun 19, 2014, at 12:08 PM, efridge wrote:
Hello,
Firstly, real new to R here.
I have a function intended to evaluate the values in columns spread over
many tables. I have an argument in the function that allows the user to
input what sequence of tables they want to draw data from. The function
seems to work fine, but when the user inputs a single number (over 9)
instead of a sequence using the : operator, I find an error message:
the input for this example is 30
Error in file(file, rt) : cannot open the connection
5 file(file, rt)
4 read.table(file = file, header = header, sep = sep, quote = quote, dec =
dec, fill = fill, comment.char = comment.char, ...)
3 FUN(specdata/3e+01.csv[[1L]], ...)
2 lapply(filepaths, read.csv)
1 pollutantmean(specdata, nitrate, 30)
In addition: Warning message:
In file(file, rt) : cannot open file 'specdata/3e+01.csv': No such file or
directory
*The problem is that when a single number (30, 104, 223) is input, it's
being stored as 3e+01 and no longer corresponds with the .csv file I'm
trying to call (030.csv).*
Below is my code:
pollutantmean - function(directory, pollutant, id = 1:332){
filenames - paste0(formatC(id, digits = 0, width = 3, flag = 0), .csv)
filepaths - file.path(directory, filenames)
list_of_data_frames - lapply(filepaths, read.csv)
big.df-do.call(rbind,list_of_data_frames)
print(str(big.df))
mean(big.df[,pollutant], na.rm=TRUE)
}
I'm curious if formatC() is converting the number to scientific notation or
is that the default for R if there is no sequence when there could be.
I think it's your `digits = 0` argument:
formatC(20, digits = 3, width = 3, flag = 0)
[1] 020
Many of you probably recognize this as a coursera assignment. It's beyond
the due date and I've submitted some (pretty not good) code for it. I just
want to have a good understanding of what's going on here, as this type of
work is directly related to my research.
--
David Winsemius
Alameda, CA, USA
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
