I'm trying to plot a boxplot graph with my data, using 'ggplot' in R, but I just can't do it. Can anyone help me out? The data is like the table below:
Paratio ShapeIdx FracD NNDis Core
-3.00 1.22 0.14 2.71 7.49
-1.80 0.96 0.16 0.00 7.04
-3.00 1.10 0.13 2.71 6.85
-1.80 0.83 0.16 0.00 6.74
-0.18 0.41 0.27 0.00 6.24
-1.66 0.12 0.11 2.37 6.19
-1.07 0.06 0.14 0.00 6.11
-0.32 0.18 0.23 0.00 5.93
-1.16 0.32 0.15 0.00 5.59
-0.94 0.14 0.15 1.96 5.44
-1.13 0.31 0.16 0.00 5.42
-1.35 0.40 0.15 0.00 5.38
-0.53 0.25 0.20 2.08 5.32
-1.96 0.36 0.12 0.00 5.27
-1.09 0.07 0.13 0.00 5.22
-1.35 0.27 0.14 0.00 5.21
-1.25 0.21 0.14 0.00 5.19
-1.02 0.25 0.16 0.00 5.19
-1.28 0.22 0.14 0.00 5.11
-1.44 0.32 0.14 0.00 5.00
And what I exactly want is a boxplot of each column, without any relation "column by column".
ggplot2 requires data in a specific format. Here, you need x= and y= where y will be the values and x will be the corresponding column ids. Use melt from reshape2 package to melt the data to get the data in this format and then plot.
require(reshape2)
ggplot(data = melt(dd), aes(x=variable, y=value)) + geom_boxplot(aes(fill=variable))
来源：https://stackoverflow.com/questions/15071334/boxplot-of-table-using-ggplot2