Displaying 20 results from an estimated 200 matches similar to: "Using ddply within a function by argument transfer"
2008 May 08
3
histogram() with "Date" class?
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2011 Aug 16
3
Constructing an additional key inside of a lattice panel
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2008 Apr 24
2
Factor to numeric
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2007 Oct 29
1
time difference error
Hello!
I have a problem making a new variabel in a dataframe that consists of a time difference.
It seems that the new variable gets into the dataframe but I cant look at it anymoore.
Here is what hapens.
> tdiff<- difftime(Kontrolltid, Starttid, units="auto")> tdiffTime differences in mins [1] 168 NA NA 165 175 140 191 195 130 160 135 165 330 178 141 NA 119 90
2008 Nov 05
2
TukeyHSD and 0.0000000
Dear list,
Sorry to ask you this, but I just ran a TukeyHSD on an model with a
two thee level factors as independent variables and a numeric score
dependent variable.
The aov gives a significant interaction effect, and using the
TukeyHSD, I get almost every row to be exactly 0.0000000. Should I be
worried??
/Fredrik
--
"Life is like a trumpet - if you don't put anything into it, you
2011 Aug 11
1
Passing on "groups" argument to xyplot within a plotting function
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2012 Jun 04
1
Math labels in .eps files
Dear list,
I have non-ascii labels that I want to include somethow in a .eps file for
inclusion into a LateX document. Is this possible?
What I see is that the (attached) png file looks ok but the .eps renders
all non-ascii labels at the bottom as [..].
I've searched around enough to learn that including math labels in a .eps
is a problem. Hower, is there a solution too somewhere?
2007 Jan 21
1
identify selected substances across individuals
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2007 Apr 16
1
Export multiple data files from R
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2011 Jul 10
1
How do I get two levels of grouping for in a lattice panel function?
Dear list,
I'm working on a panel function where I would like to be able to visualise
data grouped by the category of the data, and then also changes in summary
descriptives from one condition to another in the same scatter plot. Like
the figure attached, but with one polygon for each subset of the data set
given by a second variable (with colours still coming from the variable
specified in
2012 Jan 26
1
Finding suspicious data points?
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2013 Apr 24
1
Problems with Fortran calls when loaded a dll compiled with gfortran-4 Cygwin 4.5.3
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2007 Jan 14
1
extracting data into different subsets
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2006 Dec 14
1
question about for loop
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2012 May 03
1
Proposal: model.data
Greetings:
I'm still working on functions to make it easier for students to
interpret regression predictions. I am working out a scheme to
more easily create "newdata" objects (for use in predict functions).
This has been done before in packages like Zelig, Effects,
rms, and others. Nothing is "exactly right," though. Stata users keep
flashing their "predicted
2008 May 12
2
Cumulative lattice histograms
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2011 Jun 10
2
How do I make proper use of the by() function?
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2007 Jan 03
3
How to add characters on graph ?
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2012 Jun 06
2
non ascill characters in plots. no alternative but plotmath?
A student entered some data with text characters like epsilon and
alpha. On her Windows system, the Greek letters did not display
properly in a plot. There were some ordinary ASCII instead.
I asked her to send me the code so I could test. For me, the plot
looks ok on the screen.
Format1 <- c(320,500,700,1000,500,320,700,500,320)
Format2 <- c(800,1000,1150,1400,1500,1650,1800,2300,2500)
2005 Apr 30
2
Warning from Rcmd check - data could not find data set
This is rw2010 from CRAN.
When running Rcmd check
on a package I get:
Warning in utils::data(list = al, envir = data_env) :
data set 'vowel.test' not found
Warning in utils::data(list = al, envir = data_env) :
data set 'vowel.train' not found
Warning in utils::data(list = al, envir = data_env) :
data set 'waveform.test' not found
Warning in utils::data(list