I am trying to use featurePlot of caret in R.

This is the code I am using:

trellis.par.set(theme = col.whitebg(), warn = FALSE) 
caret::featurePlot(x = df[, 3:6], 
            y = df$ud, 
            plot = "scatter")

where all the columns of df[, 3:6]are of numeric type, while df$ud is a binary factor.

I also have installed the library ellipse as suggested elsewhere.

However, I keep getting NULL.

Any idea why?

  • $\begingroup$ Take a look at help(featurePlot) in caret for the expected class of the argument, x, which is a matrix $\endgroup$ – Richard Careaga Nov 7 '19 at 5:48

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