Dear, I'm trying to do a bar chart as the attached one (and shown below).
As you can see, the bar chart contains, for six different number of k (kNN imputation) the class separation for 22 features.
Then I have: group one with 22 features (for k=5), group two with 22 features (for k=4),... end so on.
You can notice that the color helps identifying features through different ks.
Now the problem is with the legend.
I don't want to repeat feat 1feat2 feat3 .... feat22 for six times, so I would like to have the legen showing feat1,..., feat22 just ones.
I can do it but the problem is that the legend color for feati (where i>1) does not match the bar color. In the legen the color are just blues.
How can I do that? I hope I have been clear