[R] How to display multiples lines with different color on the same plot?

Tue Jun 4 23:05:45 CEST 2013

Hi all,

I'm struggling with the display of several regression lines (with different colors) on the same plot.

I manually drew what I'm trying to do with 8 lines (see attached).

Any thoughts for a code will be very much appreciated.

Thanks

Armel

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