Em 18-07-2014 08:07, Stefano Sofia escreveu:
Dear R list users,
I have a data frame called catchment like
"year" "season" "rainfall" "colour"
1953 1 409.5 "black"
1953 2 145.3 "black"
1953 3 285.6 "red"
1953 4 275.0 "black"
1954 1 273.8 "black"
1954 2 342.8 "blue"
1954 3 167.6 "black"
1954 4 341.1 "black"
1955 1 182.3 "blue"
1955 2 211.8 "black"
1955 3 222.6 "black"
1955 4 522.1 "black"
1956 1 248.7 "red"
1956 2 244.9 "black"
...
and I would like to plot it with the colours specified in the column colour (at
the moment the colours are three: black, red and blue. I would like to have the
possibility to add oher colours to this list).
With
plot(catchment$year, catchment$rainfall, main="River Aso", xlab="years", ylab="mm",
type="p", col=catchment$colour)
the colours displayed in the graph are not the ones I have chosen.
I looked for the answer, which probably involves a transformation to factor,
but I am not able to understand well the solution.
Could somebody help me?
Thank you
Stefano Sofia
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did you try the palette() function?
you can define a new like:
> palette(c("black","red","blue"))
then you can call the colors by numbers (1,2,3)
replace the color name in the column by the respective 1,2,3 numbers ant
give a try.
I haven't try it, but it's the "natural" way I can think of.
|
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--
João Azevedo Patrício
Tel.: +31 91 400 53 63
Portugal
@ http://tripaforra.bl.ee
"Take 2 seconds to think before you act"
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
