Mary:
Here's one way.
## change the variable name to whatever title you want on your legend
data = melt(data, id="inputs",variable_name="customName")
data
g <- ggplot(data,aes(x=inputs, value, colour= customName, fill = customName,
shape=customName))
g <- g + geom_line(lwd=0.8)
g <- g + geom_point()
g <- g + scale_x_continuous(name='Number of inputs')
g <- g + scale_y_continuous('Conversion time (sec.)')

Felipe D. Carrillo
Supervisory Fishery Biologist
Department of the Interior
US Fish & Wildlife Service
California, USA
http://www.fws.gov/redbluff/rbdd_jsmp.aspx


From: Mary Kindall <mary.kind...@gmail.com>
>To: r-help@r-project.org 
>Sent: Monday, January 16, 2012 1:14 PM
>Subject: [R] ggplot- using geom_point and geom_line at the same time
>
>Hi
>I am plotting line chart using ggplot and want to use geom_line and
>geom_point simultaneously. I want to rename my legend but uptonow I remain
>unsuccessful.
>Someone please point what to add for renaming the legend.
>I attached my example below.
>Thanks
>
>
>
>con = textConnection("inputs  var1  var2 var3
>100 10 5 2
>1000 20 10 4
>5000 30 15 8
>10000 40 20 16
>30000 50 25 32")
>data = read.table(con, header=TRUE)
>data
>data = melt(data, id="inputs")
>g <- ggplot(data,aes(x=inputs, value, colour= variable, fill = variable,
>shape=variable))
>g <- g + geom_line(lwd=0.8)
>g <- g + geom_point()
>g <- g + scale_x_continuous(name='Number of inputs')
>g <- g + scale_y_continuous('Conversion time (sec.)')
>g
>
>
>
>-- 
>-------------
>Mary Kindall
>Yorktown Heights, NY
>USA
>
>    [[alternative HTML version deleted]]
>
>______________________________________________
>R-help@r-project.org mailing list
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.
>
>
>
        [[alternative HTML version deleted]]

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