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...e factor) with a regression line for each. How do I figure out the r2 value and coefficients of each regression line and add them as text to the plot. Thanks for your help! James -- View this message in context: http://www.nabble.com/Regression-for-levels-of-a-factor-xyplot-type%3D%22r%22-tp25692526p25692526.html Sent from the R help mailing list archive at Nabble.com.