[R] ggplot legend for multiple time series

[Edwin Sun]

Hello - Thank you so much for the help. It works perfectly. I guess that as
many have pointed out, ggplot is a great package but there is a lack of
documentation and examples. 

Edwin Sun


baptiste auguie-5 wrote:
> 
> Hi,
> 
> I don't understand why you used scale_manual_colour if you want only
> black lines. To have different line types in the legend you can map
> the linetype to the data,
> 
> 
> huron <- data.frame(year=1875:1972, level=LakeHuron)
> 
> ggplot(huron, aes(year)) +
>    geom_line(aes(y=level+5, linetype="above")) +
>    geom_line(aes(y=level-5, linetype="below")) +
>    scale_linetype_manual("offset", c(1, 2))
> 
> HTH,
> 
> baptiste
> 2009/12/1 Edwin Sun <csun at cfr.msstate.edu>:
>>
>> 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.
>>
>> ______________________________________________
>> R-help at 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.
>>
> 
> ______________________________________________
> R-help at 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.
> 
> 

-- 
View this message in context: http://n4.nabble.com/ggplot-legend-for-multiple-time-series-tp932430p932491.html
Sent from the R help mailing list archive at Nabble.com.