[R] use of = in place of == (was no subject)

[John Fox]

Dear Bret,

You appear to have used = (for assignment or argument specification) when
you meant == (equals).

I hope this helps,
 John

--------------------------------
John Fox
Department of Sociology
McMaster University
Hamilton, Ontario
Canada L8S 4M4
905-525-9140x23604
http://socserv.mcmaster.ca/jfox 
-------------------------------- 

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Brett 
> Stansfield
> Sent: Thursday, March 17, 2005 9:09 PM
> To: R help (E-mail)
> Subject: [R] (no subject)
> 
> I recently tried to make R highlight certain features in a 
> scatterplot matrix
> 
> pairs(sleep[c("SlowSleep", "ParaSleep", "logbrw", "loglife", 
> "loggest", "logbw")],
> *	col=1+as.integer(ParaSleep > 5.5))
> 
> 	this worked fine but when I wanted to add another 
> condition i.e where another variable SlowSleep = 7.7, this is 
> what I got
> 	> pairs(sleep[c("SlowSleep", "ParaSleep", "logbrw", 
> "loglife", "loggest", "logbw")],
> *	col=1+as.integer(ParaSleep > 5.5 & SlowSleep=7.7))
> 	Error: syntax error
> 	> pairs(sleep[c("SlowSleep", "ParaSleep", "logbrw", 
> "loglife", "loggest", "logbw")],
> *	col=1+as.integer(ParaSleep > 5.5 & SlowSleep= 7.7))
> 	Error: syntax error
> 	> pairs(sleep[c("SlowSleep", "ParaSleep", "logbrw", 
> "loglife", "loggest", "logbw")],
> *	col=1+as.integer(ParaSleep > 5.5 & SlowSleep = 7.7))
> 	Error: syntax error
> 	I then tried two separate col statements as below
> 	> pairs(sleep[c("SlowSleep", "ParaSleep", "logbrw", 
> "loglife", "loggest", "logbw")],
> *	col=1+as.integer(ParaSleep > 5.5)
> *	col1=2+as.integer(SlowSleep = 7.7))
> 	Error: syntax error
> 	> pairs(sleep[c("SlowSleep", "ParaSleep", "logbrw", 
> "loglife", "loggest", "logbw")],
> *	col=1+as.integer(ParaSleep > 5.5)
> *	col=2+as.integer(SlowSleep = 7.7))
> Error: syntax error
> But still no joy, can you recommend anything brett.
> 
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