Hello, I am quite new to R and I am trying to get a round correlation from a table with dozens of columns. However, all the columns contain several blank places which show to me as NAs. Then, when I type round(cor(data),2), I get no results - everything (except correlation of one column with the same one, of course) is NA. I do not want to replace NA with zero, because it would ruin the results. I just want R "not to look at NA" and correlate just places with numbers. Is it possible? Thank you very much for help! -- View this message in context: http://r.789695.n4.nabble.com/Excluding-NAs-from-round-correlation-tp3741296p3741296.html Sent from the R help mailing list archive at Nabble.com.
Excluding NAs from round correlation
4 messages · Weidong Gu, Julie
check ?cor Please note the parameter 'use' Weidong Gu
On Sat, Aug 13, 2011 at 9:06 AM, Julie <julie.novakova at gmail.com> wrote:
Hello, I am quite new to R and I am trying to get a round correlation from a table with dozens of columns. However, all the columns contain several blank places which show to me as NAs. Then, when I type round(cor(data),2), I get no results - everything (except correlation of one column with the same one, of course) is NA. I do not want to replace NA with zero, because it would ruin the results. I just want R "not to look at NA" and correlate just places with numbers. Is it possible? Thank you very much for help! -- View this message in context: http://r.789695.n4.nabble.com/Excluding-NAs-from-round-correlation-tp3741296p3741296.html Sent from the R help mailing list archive at Nabble.com.
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Thank you, I found this in the help pack: use: an optional character string giving a method for computing covariances in the presence of missing values. This must be (an abbreviation of) one of the strings "everything", "all.obs", "complete.obs", "na.or.complete", or "pairwise.complete.obs" I should probably use "na.or.complete" when I want to get results not saying NA, is it right? -- View this message in context: http://r.789695.n4.nabble.com/Excluding-NAs-from-round-correlation-tp3741296p3741924.html Sent from the R help mailing list archive at Nabble.com.
The help pack says: use: an optional character string giving a method for computing covariances in the presence of missing values. This must be (an abbreviation of) one of the strings "everything", "all.obs", "complete.obs", "na.or.complete", or "pairwise.complete.obs" If I used "everything", the results would be NAs again. "all.obs" would result in error. "complete.obs" gives me error too. "na.or.complete" gives me all NAs... But "pairwise.complete.obs" finally got the right results. -- View this message in context: http://r.789695.n4.nabble.com/Excluding-NAs-from-round-correlation-tp3741296p3742039.html Sent from the R help mailing list archive at Nabble.com.