On 01/12/2010 10:13 AM, Filoche wrote:
Hi everyone.

I have a quick question regarding the look of my legend in my plot. As you
can see in the next figure, I have 3 series.

http://r.789695.n4.nabble.com/file/n3067466/legend.png


However, I find rather difficult to differentiate the series 1 and 3
according to their line type (lty). I would like to know if it was possible
to make the line type in the legend to appear more clearly. For example, to
give more horizontal space each side of the symbols "square" to have a
better idea of the line type.


There is no parameter to the legend function to control this, but it is pure R code, so you could write your own by modifying the legend() function.

If you take a look at legend, you'll see that it draws lines of length 2 (in some units) when do.lines is TRUE. Change that to a bigger number, and you'll get longer lines. You'll also need to fiddle with the size of the box, or the legend won't fit. (I think xbox is the variable holding its width.)

Duncan Murdoch

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