[R] Row order in plot

[qroberts]

This is the format of the table as it appears in R

>mice

          X  Green.1  Yellow.2     Blue.3      Gray.4
1   Base   469.5399  508.1532  487.1443  492.2544
2    PBS   459.6553  474.0124  417.2651  392.9518
3 25 Mch  359.6216  418.0417  377.7020  394.2102
4 50 Mch  206.1835  262.8818  252.8041  172.0568
5   Ext.   287.4200   279.8562  287.3744  236.5091

I have been plotting Green.1 vs X as follows

plot(Green.1~X,data=mice)

The order on the x axis is alphabetical e.g 25 Mch, 50 Mch, Base, Ext., PBS

When I would like it to be : Base, PBS, 25 Mch, 50 Mch, Ext. like in the
table.



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