Hi
I am using R to implement a multidimensional algorithm which maps places
based on the distances between each other. This is presented really well in
Rggobi.
However, for each place plotted, I have another numerical statistic between
0 and 1 which I would like to represent by colouring the points in Rgobbi.
However I do not know how to do this.
The file I am using is called places.txt and has the following contents:
Chelt Exeter London Birm
Chelt 0 118 96 50
Exeter 118 0 118 163
London 96 118 0 118
Birm 50 163 118 0
To plot these, the R code is as follows:
library(rggobi)
Places<-read.table("C:\\places.txt")
Places.location <- cmdscale(Places, k=2)
round(Places.location,0)
g<-ggobi(Places.location)
Now, for each point plotted I want to assign a colour to it based on the
statistic in a file called PlacesStats.txt which currently has the following
format:
0.1 0.3 0.4 0.5
With the values in order of the names of the places given above so that:
0.1 is assigned to Chelt
0.3 is assigned to Exeter
0.4 is assigned to London
0.7 is assigned to Birm
Ideally, I want a gradient of two colours so that say, 0 = blue and 1 = red
and values between are a mixture.
Any ideas on how I could do this? Would I need to change the PlacesStats.txt
file so that is reads:
Chelt 0.1
Exeter 0.3
London 0.4
Birm 0.7
for example?
I would be very grateful if anybody could help.
Many thanks
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