Controlling widths in write.fwf()
I was trying to format and write each line while looping over the entire matrix; which made it terribly slow. Without the loop, it works fine. Thanks Duncan. -----Original Message----- From: Duncan Murdoch [mailto:murdoch at stats.uwo.ca] Sent: Wednesday, April 15, 2009 10:04 AM To: Vemuri, Aparna Cc: r-help at r-project.org Subject: Re: [R] Controlling widths in write.fwf()
On 4/15/2009 11:45 AM, Vemuri, Aparna wrote:
Duncan I tried writeLines. But I need to print about 230000 lines and it is really slow.
This took about 1 second here: writeLines(as.character(1:230000), "C:/temp/test.txt") I can't see how to make it much faster than that. Duncan Murdoch
Thanks Aparna -----Original Message----- From: Duncan Murdoch [mailto:murdoch at stats.uwo.ca] Sent: Tuesday, April 14, 2009 4:34 PM To: Vemuri, Aparna Cc: r-help at r-project.org Subject: Re: [R] Controlling widths in write.fwf() On 14/04/2009 7:28 PM, Vemuri, Aparna wrote:
Is there a way to handle the widths of values being written to a file using wrtite.fwf() ? For example, I used read.fwf(file, width.vector) to read a file.
After
making the necessary data manipulation, I want to write the data to a new file in the same width.vector format. Is there a way to specify this?
There is no write.fwf function, but you can use sprintf() to convert things to strings and writeLines to write those strings. There's a
lot
of flexibility in the formats allowed; see the man page. Duncan Murdoch
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