Hello,
A nice guy call Jun Shen was helping me out with this, but I require a bit more
help. Below is my data set or list called 'test'. I'm trying to calculate the
%RSD for each pair of index and keep it in cronological order if you can
imagine a 3rd column with 'date' beside index.
Result Index
1 0.2901 17
2 0.2928 17
3 0.2913 18
4 0.2893 18
5 0.3526 9
6 0.3316 9
7 0.3492 10
8 0.3467 10
9 0.3385 11
10 0.3341 11
11 0.3449 12
12 0.3406 12
13 0.3690 13
14 0.3327 13
15 0.3324 14
16 0.3245 14
17 0.3245 15
18 0.3229 15
19 0.3331 16
20 0.3208 16
now this bit of programming works for it how ever it puts the mean of my index
back into numeric order.
aggregate(test[1],test[2],mean)->inter
names(inter)[2]='mean'
merge(test,inter,all=T)->inter2
inter2$RSV=inter2$Result/inter2$mean
Would anyone know away around this so I could keep the data in cronological
order?
Kind Regards,
Al
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