[Rd] read.csv behaviour

From: Mehmet Suzen <msuzen_at_mango-solutions.com>
Date: Wed, 28 Sep 2011 00:23:53 +0100

This might be obvious but I was wondering if anyone knows quick and easy way of writing out a CSV file with varying row lengths, ideally an initial data read from a CSV file which has the same format. See example below.

I found it quite strange that R cannot write it in one go, so one must append blocks or post-process the file, is this true? (even Ruby can do it!!)

Otherwise it puts ,"","" or similar for missing column values in the shorter length rows and fill=FALSE option do not work!

I don't want to post-process if possible.

See this post:
http://r.789695.n4.nabble.com/Re-read-csv-trap-td3301924.html

Example that generated Error!

writeLines(c("A,B,C,D",

"1,a,b,c",
"2,f,g,c",
"3,a,i,j",
"4,a,b,c",
"5,d,e,f",
"6,g,h,i,j,k,l,m,n"),
con=file("test.csv")) read.csv("test.csv") try(read.csv("test.csv",fill=FALSE)) LEGAL NOTICE This message is intended for the use o...{{dropped:10}} ______________________________________________
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https://stat.ethz.ch/mailman/listinfo/r-devel Received on Tue 27 Sep 2011 - 23:29:41 GMT

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