On Aug 6, 2012, at 7:34 AM, Dominic Roye wrote:
Hello everyone,
I have a dataset with 5 colums (4 colums with thresholds of weather
stations and one with month - data of 5 years). Now I would like to
calculate the average for each month.
I tried this unsuccessfully:
lf.med <- sapply(LF[,1:4],mean,)
If you want to group calculations within categories then sapply is not
the right function to turn to immediately. Use one of 'aggregate',
'tapply' or 'ave'.
Error in mean.default(X[[1L]], ...) :
'trim' must be numeric and have length 1
It is telling you that the unnamed third argument was matched to the
'trim' parameter of the function 'mean'.
Perhaps:
aggregate( LF[,1:4], list(LF[,5]), mean)
With
lf.med <- by(LF[,1:4],LF[,5],mean)
It works, but its deprecated.
Actually what is deprecated is the function `mean.data.frame`.
Any help is greatly appreciated!!! Thanky everybody`!!
Minimal example. PLEASE.
Dominic
dput(LC)
Please do note that you offered an object 'LC' but you code referred
to 'LF'.
structure(list(Serra.da.Foladoira = c(21.1359565217391,
21.7184782608695,
23.5492608695652, 23.4660434782608, 23.6740869565217,
21.1775652173913,
19.8460869565217, 23.3412173913043, 22.8835217391304,
24.3398260869565,
snipped 1800+ length vector
[[alternative HTML version deleted]]
>>>>>>>>>
and provide commented, minimal, self-contained, reproducible code.
^^^^^^^^
--
David Winsemius, MD
Alameda, CA, USA
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