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spraydate
2005 Apr 10
2
Plotting the occassional second label
Dear useRs,
I'm trying to plot spray quantities against dates, and label the points
on the plot. Basically quite simple, but sometimes two chemicals have
been used and are listed in separate rows in the table as below; then
the labels are written on top of each other.
> spray
SprayDate PD Trt Qwater Qai
1 2005-03-09 Spidermites Pegasus 1300 1.04
2 2005-03-10 Powdery MKP 800 0.40
3 2005-03-10 Powdery Nimrod 250 EC 800 2.40
4 2005-03-12 Spidermites Pegasus 1300 1.04
5 2005-03-16 Spidermites Pegasus 1300 1.04...