[R] assign same legend colors than in the grouped data plot

[agent dunham]

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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