Grouped barplot in ggplot2 in R
问题 I would like to make a grouped bar plot. An example of my data is as follows: site code year month gear total value 678490 2012 3 GL 13882 678490 2012 4 GL 50942 678490 2012 5 GL 54973 678490 2012 6 GL 63938 678490 2012 7 GL 23825 678490 2012 8 GL 8195 678490 2012 9 GL 14859 678490 2012 9 RT 3225 678490 2012 10 GL 981 678490 2012 10 RT 19074 678490 2012 11 SD 106384 678490 2012 11 RT 2828 678490 2012 12 GL 107167 678490 2012 12 RT 4514 There are 17 site code options, four year options, twelve