type ?cor and read the help file
In particular read it till you find the entry that tells you how to deal with
missing observations. You need to do this because as you get more competent you
will undoubdtedly come across other issues, so learning the format of the help
and realising why you need to check the Arguments section will reduce your
frustration in the future.
You also need to read the posting guide to make sure that you don't put
people offside by failing to follow a basic set of standards which include
giving a decent description of your problem in the subject of your message.
cor(x, y = NULL, use = "all.obs",
method = c("pearson", "kendall",
"spearman"))
use is the appropriate argument. All you need to do is to decide which option to
wish to use.
Tom
> -----Original Message-----
> From: Brett Stansfield [mailto:brett at hbrc.govt.nz]
> Sent: Thursday, 17 March 2005 5:55 AM
> To: R help (E-mail)
> Subject: [R] (no subject)
>
>
> Dear R
> I'm trying to do a correlation matrix for some variables I have.
> Unfortunately there are some NA entries for some of the variables
> I tried the following
>
> cor(sleep[c("logbw", "logbrw", "SlowSleep",
"ParaSleep", "loglife",
> "loggest")])
>
> but it told me
> Error in cor(sleep[c("logbw", "logbrw",
"SlowSleep",
> "ParaSleep", "loglife",
> :
> missing observations in cov/cor
>
> How can I get R to conduct a correlation matrix for this data set??
>
> brett
>
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> PLEASE do read the posting guide!
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>
