Graves, Gregory wrote:
I issued the following command to obtain the std dev for each month.
psd<-numSummary(Sal, groups=month, statistics=c("sd"))
numSummary is not in base R, is it? If not, which package? Please read
the posting guide! Please provide reproducible code (we do not have Sal
etc.).
which resulted in
psd
sd n NA
1 6.930340 9367 2319
2 7.847003 10827 1008
3 5.962308 12988 404
4 3.632105 12576 384
5 3.328189 13030 362
6 10.101336 12955 5
7 11.759585 13071 321
8 10.277566 12286 1105
9 8.561922 12286 674
10 9.252890 13343 27
11 9.568852 12591 369
12 9.622851 12020 946
typeof(psd)
[1] "list"
I guess it is a data.frame.
Please read "An Introduction to R" or other introductory material in
orde3r to learn how to extract vectors from data.frames or lists.
In this case for both data.frames and lists:
psd[[1]] for first vector etc.
Uwe Ligges
I want plot sd versus column 1 (month of year) of the list psd.
The only way I can figure out how to do this is to manually copy the
table into Excel, reformat, and then export that back out as a new csv.
There has to be a better way?
Gregory A. Graves
Lead Scientist
REstoration COoordination and VERification (RECOVER)
Watershed Division
South Florida Water Management District
Phones: DESK: 561 / 682 - 2429
CELL: 561 / 719 - 8157
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
