You can also use the facilities in the lattice package. Using Jim´s
data names:
require(lattice)
xyplot(A+B+C~D, data=wag, type="l", auto.key=list(points = FALSE, lines
= TRUE, space = "bottom"), ylab="value", main="Three variable plot")
Regards,
Francisco
Jim Lemon wrote:
> Wayne Aldo Gavioli wrote:
>> Hello all,
>>
>> I was wondering if anyone knew how to construct a multiple line graph on R,
>> where there are 2 (or more) sets of data points plotted against some x axis
>> of
>> data, and you can draw a line on the graph connecting each set of data
>> points.
>>
>> For example:
>>
>> A B C D
>> 0.6566 2.1185 1.2320 5
>> 0.647 2.0865 1.2325 10
>> 0.6532 2.1060 1.2287 15
>> 0.6487 2.1290 1.2313 20
>> 0.6594 2.1285 1.2341 25
>> 0.6577 2.1070 1.2343 30
>> 0.6579 2.1345 1.2340 35
>> 0.6734 2.1705 1.2362 40
>> 0.675 2.1845 1.2372 45
>> 0.6592 2.1550 1.2340 50
>> 0.6647 2.1710 1.2305 55
>>
>>
>>
>> Would there be a way:
>> a) To graph all the points of data in sets A, B and C as Y coordinates on one
>> graph, using the points in set D as the X-axis/coordinates for all 3 sets
>> (A, B
>> and C)?
>> b) To be able to draw 3 lines on the graph that connect each set of data (1
>> line
>> connects all the A points, one line connects all the B points, one line
>> connects
>> all the C points)
>>
>>
>> I couldn't find anything in the examples or the help section about multiple
>> lines on the same graph, only one line.
>>
> Hi Wayne,
>
> Assume your data is in a data frame named "wag":
>
> plot(wag$D,wag$A,main="Three variable plot",xlab="D",ylab="Value",
> ylim=range(wag[c("A","B","C")]),type="l",col=2)
> lines(wag$D,wag$B,type="l",pch=2,col=3)
> lines(wag$D,wag$C,type="l",pch=3,col=4)
> legend(25,1.9,c("A","B","C"),lty=1,col=2:4)
>
> Jim
>
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>
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