Hello,

I have three method types and 100 generalization errors for each, all in the range [0.65,0.81]. I would like to make a stacked histogram plot using ggplot2 with this data ...
 
Therefore I need a data frame of the form e.g.

Method                   GE
----------                   ------
"Classic"                0.76
"Classic"                0.79
"Own Bootstrap"   0.81
"Own Bootstrap"   0.79
"R Bootstrap"        0.71
"R Bootstrap"        0.75

So I combine the data in the following way:

normalerrors <- rbind(cbind(rep("Classic",S),classicge[,1]),
    cbind(rep("Own Bootstrap",S),ownge[,1]),cbind(rep("R Bootstrap",S),rbootge[,1]))
normalerrors <- data.frame(method=factor(normalerrors[,1]),ge=normalerrors[,2])

But doing it in this way my GE coefficients get automatically converted to string type ... how can I avoid this conversion when doing the cbind?

TIA,
Best regards,
Giovanni


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