I have a dataframe consisting of dissimilarity ratings for pairs of 12 nations, and what I wish to do is essentially divide the columns (the nations) into three different groups (not combining their scores).
I am performing a non-metric multidimensional scaling, so I would like to plot the dissimilarity ratings with convex hulls according to these three groups.
I know the code for making the plots, all I am missing is the grouping variable that is needed, and I cannot for the life of me figure out how to create it.
Brazil Congo Cuba Egypt France India Israel Japan China UdSSR USA Yugoslavia
1 0.00 4.83 5.28 3.44 4.72 4.50 3.83 3.50 2.39 3.06 5.39 3.17
2 4.83 0.00 4.56 5.00 4.00 4.83 3.33 3.39 4.00 3.39 2.39 3.50
3 5.28 4.56 0.00 5.17 4.11 4.00 3.61 2.94 5.50 5.44 3.17 5.11
4 3.44 5.00 5.17 0.00 4.78 5.83 4.67 3.83 4.39 4.39 3.33 4.28
5 4.72 4.00 4.11 4.78 0.00 3.44 4.00 4.22 3.67 5.06 5.94 4.72
6 4.50 4.83 4.00 5.83 3.44 0.00 4.11 4.50 4.11 4.50 4.28 4.00
7 3.83 3.33 3.61 4.67 4.00 4.11 0.00 4.83 3.00 4.17 5.94 4.44
8 3.50 3.39 2.94 3.83 4.22 4.50 4.83 0.00 4.17 4.61 6.06 4.28
9 2.39 4.00 5.50 4.39 3.67 4.11 3.00 4.17 0.00 5.72 2.56 5.06
10 3.06 3.39 5.44 4.39 5.06 4.50 4.17 4.61 5.72 0.00 5.00 6.67
11 5.39 2.39 3.17 3.33 5.94 4.28 5.94 6.06 2.56 5.00 0.00 3.56
12 3.17 3.50 5.11 4.28 4.72 4.00 4.44 4.28 5.06 6.67 3.56 0.00
This is probably a frustratingly simple command, but I am truly lost.
