One function I like is from package psych.
library(psych)
describe.by(ARK$TotalWater, group=Tray:Pot)
Andrew Koeser
On 3/9/2014 10:39 PM, Erynn Call wrote:
I'm trying to create a new variable (meanABUNDHA) by obtaining a mean value
*by* other variables. I surveyed birds (multiple species) at
Tena koe Philip
An alternative to Jim's solution which seems to work and you may, or may not,
find less messy:
df <- read.table(text="id yr val
a 1950 1
b 1950 10
a 1951 2
b 1952 3
c 1952 4
a 1954 5
b 1954 2
c 1954 3",header=TRUE)
df1 <- df[order(df$id, df$yr),]
df1$valCS <- unlist(by(df1$val, d
Tena koe Erynn
Have you checked tapply and aggregate?
HTH
Peter Alspach
-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
Behalf Of Erynn Call
Sent: Monday, 10 March 2014 3:40 p.m.
To: r-help@r-project.org
Subject: [R] How to obtain a m
I wrote the code to graph a chi-squared density function, shade the
percentile, and point to the CV, but it has a few issues I can't seem to
resolve
1. It won't work at all for DF = 1 due to ylim going to infinity, but I
haven't been able to resolve this still after hours of trying.
2) The y-axis
On 03/10/2014 05:57 AM, Philip A. Viton wrote:
Suppose I have a dataframe beginning:
id yr val
a 1950 1
b 1950 10
a 1951 2
I'm trying to produce a table of cumulative sums
of val, disaggregated by id and then yr, so the result
should begin
id yr cumval
a 1950 1
a 1951 3
b 1950 10
I've been t
I'm trying to create a new variable (meanABUNDHA) by obtaining a mean value
*by* other variables. I surveyed birds (multiple species) at multiple sites
and have multiple surveys within a REP (i.e. in example data below, SURVEY
55 and 57 are in REP 11). I need the mean ABUNDHA (pooling SURVEY) for
On Sun, 9 Mar 2014, Umaga Optudio wrote:
Hi there,
in Zeileis, Klieber Kramer and Hornik (2003) - "Testing and dating of
structural changes in practice" its shows how to use the strucchange pakge
to determine breakpoints in time series, my question is in regard to one of
the figures that is pre
Suppose I have a dataframe beginning:
id yr val
a 1950 1
b 1950 10
a 1951 2
I'm trying to produce a table of cumulative sums
of val, disaggregated by id and then yr, so the result
should begin
id yr cumval
a 1950 1
a 1951 3
b 1950 10
I've been trying to do this using "aggr
Hi,
Check for the additional "%" in your code "%d%".
as.Date(strDates,"%m/%d/%Y")
#[1] "1965-01-05" "1975-08-16"
A.K.
On Sunday, March 9, 2014 12:16 PM, Hermann Norpois wrote:
Hello,
I have some problems with as.Date.
strDates <- c ("01/05/1965", "08/16/1975")
dates <- as.Date (strDates, "%
Hi there,
in Zeileis, Klieber Kramer and Hornik (2003) - "Testing and dating of
structural changes in practice" its shows how to use the strucchange pakge
to determine breakpoints in time series, my question is in regard to one of
the figures that is presented in this paper.
At the end of every ex
I hadn’t seen an error message because I hadn’t tried it yet. I was
leery of doing so for two reasons. First, I didn’t seen anything in the
?save page that said it was possible to save to a file and directory of
the user’s choice, and later to retrieve it! It would be very useful to
a novice
> >>> Can I do this (in Windows 7) to save everything that comes up with
> >>> ls(),
> >>> guessed at by what I find with ?rm:
> >>>
> >>> save(list=ls(),file="C:\am\myfiles\ProjectA.RData")
> >>>
> >>> Or would I need forward slashes, but this would otherwise work?
Yo
Duncan,
Thanks for the explanation and commentary. Starting to make more sense...so,
long story short, it seems the first thing one should check is whether base
imports utils:
> packageDescription("base")
Package: base
Version: 3.0.1
Priority: base
Title:
This is all in the R-admin manual. You may have to install rJava from the
sources.
And such questions belong on r-sig-mac: see the posting guide.
> On 9 Mar 2014, at 11:32, Osamu Ogasawara wrote:
>
> Hello,
> I'm writing a program that provide an interactive interface between R and
> JavaFX
On Sun, 9 Mar 2014, Hermann Norpois wrote:
Hello,
I have some problems with as.Date.
strDates <- c ("01/05/1965", "08/16/1975")
dates <- as.Date (strDates, "%m/%d%/%Y")
Instead of "%d%" just "%d":
R> as.Date(strDates, "%m/%d/%Y")
[1] "1965-01-05" "1975-0
On 09.03.2014 11:34, Hermann Norpois wrote:
Hello,
I have some problems with as.Date.
strDates <- c ("01/05/1965", "08/16/1975")
dates <- as.Date (strDates, "%m/%d%/%Y")
^
Remove the "%" after the "d".
Best,
Uwe Ligges
dates
[1] NA NA # I expected my da
Hello,
I have some problems with as.Date.
strDates <- c ("01/05/1965", "08/16/1975")
dates <- as.Date (strDates, "%m/%d%/%Y")
dates
[1] NA NA # I expected my dates. What was going wrong?
Thanks
Hermann
[[alternative HTML version deleted]]
__
R
Hi David,
Again, please keep the list copied.
I think the documentation is clear, but if you still have doubts why
don't you try it and see?
Best,
Ista
On Sat, Mar 8, 2014 at 11:39 PM, David Parkhurst wrote:
> That talks about saving to file ".RData".
I'm still asking, can I save to
> files wi
On 14-03-08 6:42 PM, Benjamin Tyner wrote:
Duncan,
Thank you for the informative link. So, do the loaded namespaces have an
"ordering" akin to the package search path that determines that
functions in the base namespace can see objects in the utils namespace?
(I noticed that loadedNamespaces() j
Hello,
I'm writing a program that provide an interactive interface between R and
JavaFX (2.2+),
https://github.com/oogasawa/rjfx.chart
on the top of the rJava package.
This program works fine on Linux and MS-Windows, but it does not work on Mac OS
X.
The reason seems that rJava on Mac OS X ignore
On Sun, Mar 9, 2014 at 5:11 AM, Rolf Turner wrote:
> On 08/03/14 10:22, Yuanzhi Li wrote:
> > Hello, everyone,
> >
> > Do you have any idea to get a set of random points within a regular
> > pentagon? Thanks in advance!
>
> You can easily do this using the spatstat package.
>
Or with sines, cos
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