R help - Feb 2012 - assign same legend colors than in the grouped data plot

Dear community, 

I've plotted  data and coloured depending on the factor variable v3. 
In the legend, I'd like to assign properly  the same colors than in the
factor (the factor has 5 levels).

I've been trying this but it doesn't work.

plot(var1, var2, xlab = "var1", ylab = "var2", col =var3 ,
bty='L')
legend(locator(1),c("level 1 var3",  "level 2
var3","level 3 var3",  "level
4 var3","level 5 var3"), col=var3,pch=16)


Thanks in advance, crosspide at hotmail.com

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This is certainly not a reproducible example, but this works fine for me.

lets = factor(sample(letters[1:3], 10, TRUE))
plot(1:10, 1:10, col = lets)
legend("topleft", legend = levels(lets), col = seq.int(length(lets)),
lty = 1)

Michael

On Wed, Feb 15, 2012 at 9:35 AM, agent dunham <crosspide at hotmail.com>
wrote:
> Dear community,
>
> I've plotted ?data and coloured depending on the factor variable v3.
> In the legend, I'd like to assign properly ?the same colors than in the
> factor (the factor has 5 levels).
>
> I've been trying this but it doesn't work.
>
> plot(var1, var2, xlab = "var1", ylab = "var2", col
=var3 , bty='L')
> legend(locator(1),c("level 1 var3", ?"level 2
var3","level 3 var3", ?"level
> 4 var3","level 5 var3"), col=var3,pch=16)
>
>
> Thanks in advance, crosspide at hotmail.com
>
> --
> View this message in context:
http://r.789695.n4.nabble.com/assign-same-legend-colors-than-in-the-grouped-data-plot-tp4390641p4390641.html
> Sent from the R help mailing list archive at Nabble.com.
>
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> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

On 02/16/2012 01:35 AM, agent dunham wrote:
> Dear community,
>
> I've plotted  data and coloured depending on the factor variable v3.
> In the legend, I'd like to assign properly  the same colors than in the
> factor (the factor has 5 levels).
>
> I've been trying this but it doesn't work.
>
> plot(var1, var2, xlab = "var1", ylab = "var2", col
=var3 , bty='L')
> legend(locator(1),c("level 1 var3",  "level 2
var3","level 3 var3",  "level
> 4 var3","level 5 var3"), col=var3,pch=16)
>
>
Hi agent,
At a guess, your problem is that you are getting the right colors in the 
wrong order. Your legend call should probably be:

legend(locator(1),c("level 1 var3","level 2
var3","level 3 var3",
   "level 4 var3","level 5
var3"),col=as.numeric(levels(var3)),pch=16)

Then, you may get the correct colors.

Jim