Hello All, I am trying to create a legend for a black-white graph. The package I use is ggplot2. It can add colors to the legend key but not line types. Can you please help? # example from Wickman (2009, ggplot2 - elegant graphics for data analysis, page 109) library(ggplot2) huron <- data.frame(year=1875:1972, level=LakeHuron) ggplot(huron, aes(year)) + geom_line(aes(y=level+5, colour="above")) + geom_line(aes(y=level-5, colour="below")) + scale_colour_manual("Direction", c("above"="black", "below"="black")) Thanks, Edwin Changyou Sun, Ph.D. Associate Professor Natural Resource Policy & Economics Box 9681, Department of Forestry Mississippi State University Mississippi State, MS 39762 #363 Thompson Hall (662) 325 7271 (ph), 325 8726 (fax) csun@cfr.msstate.edu www.cfr.msstate.edu/forestry [[alternative HTML version deleted]]
Hello All, I am trying to create a legend for a black-white graph. The package I use is ggplot2. It can add colors to the legend key but not line types. Can you please help? # example from Wickman (2009, ggplot2 ? elegant graphics for data analysis, page 109) library(ggplot2) huron <- data.frame(year=1875:1972, level=LakeHuron) ggplot(huron, aes(year)) + geom_line(aes(y=level+5, colour="above")) + geom_line(aes(y=level-5, colour="below")) + scale_colour_manual("Direction", c("above"="black", "below"="black")) Thanks, Edwin Changyou Sun, Ph.D. Associate Professor Natural Resource Policy & Economics Box 9681, Department of Forestry Mississippi State University Mississippi State, MS 39762 #363 Thompson Hall (662) 325 7271 (ph), 325 8726 (fax) csun at cfr.msstate.edu www.cfr.msstate.edu/forestry -- View this message in context: http://n4.nabble.com/ggplot-legend-for-multiple-time-series-tp932430p932430.html Sent from the R help mailing list archive at Nabble.com.