Displaying 20 results from an estimated 1000 matches similar to: "Excluding columns from dataframe and selecting row records"
2006 Aug 29
1
Bootstraping for groups and subgroups and joing with other table
Dear R-experts,
I have a table with following collumns: State, SamplePlot, Species and BodySize. I sampled bird species at 34 SamplePlots and 5 States (regions) monthly during two years. On each bird record I measured bodysize and identified the species. So I have many records of each species (about 150 species) at each SamplePlot and each Region (State).
Now I would like bootstrap
2010 Jul 22
2
p-VALUE calculation
Here is my dataframe with 1000 rows:
employee_id weigth p-value
100 150
101 200
102 300
103 180
.....
My question:
how can I calculate the p-value in R for each employee? the
distribution of the weigth will be established from the above 1000 samples.
--
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2006 Nov 02
2
Simple question about Lists
Hello,
I know this must be a very simple problem, but I can't work it out
from the documentation that is available. I've got a list of data I
would like to plot (the weights of a single neuron that was trained
using the neural package). The problem I'm encountering is that this
set of weights, are in the form of a list.
> network$weigth[1]
[[1]]
[,1]
[1,]
2006 Aug 29
0
En: Bootstraping for groups (right data tables)
Dear R-friends,
Unfortunately the tables that I "past" on last email gone with bad visual structure. So I send it again. Sorry to do this so confuse.
Miltinho
====
Table1 - Bird records
State,SampleSite,Species,Bodysize
SaoPaulo,Site1,Spp01,4.39
SaoPaulo,Site1,Spp04,4.05
SaoPaulo,Site1,Spp01,2.75
SaoPaulo,Site1,Spp02,8.18
SaoPaulo,Site1,Spp02,0.80
2006 Aug 29
2
EOF and CCA analysis
Hello!
I would like to do Empirical Orthogonal functions and
Canonical correlation analysis on satellite data. My
matrices are going to be very big (more than 10,000
locations). Are there limitations in R regarding the
size of the matrix?
thanks a lot
regards
Isidora
2008 Sep 03
1
portfolio.optim and assets with weigth equals to zero...
Hello.
I don't understand a particular output of portfolio.optim (tseries).
I have 4 assets and the portfolio.optim returns an asset with weight equals
to zero.
If I do a portfolio.optim with 3 assets, without the asset with weight
equals to zero,
it returns a completely different result.
That's I would expected the same weights as the run with 4 assets.
Below the code.
Thanks in
2011 Mar 11
5
How to calculate means for multiple variables in samples with different sizes
Hello R-helpers:
I have data like this:
sample replicate height weight age
A 1.00 12.0 0.64 6.00
A 2.00 12.2 0.38 6.00
A 3.00 12.4 0.49 6.00
B 1.00 12.7 0.65 4.00
B 2.00 12.8 0.78 5.00
C 1.00 11.9 0.45 6.00
C 2.00 11.84 0.44 2.00
C 3.00 11.43 0.32 3.00
C 4.00 10.24 0.84 4.00
D
2010 Mar 25
1
Problem with reshaping data from wide to long format
Hi,
I have a data.frame in wide format which I would like to reshape into
a long format:
example (nonsense) data:
> dput(perus2)
structure(list(id = c(30L, 38L, 21L, 12L, 22L, 28L, 31L, 44L,
8L, 47L, 23L, 20L, 41L, 42L, 29L, 50L, 5L, 33L, 4L, 17L, 11L,
1L, 18L, 6L, 9L, 32L, 16L, 14L, 39L, 48L, 37L, 43L, 25L, 27L,
35L, 40L, 45L, 49L, 2L, 34L, 10L, 15L, 24L, 26L, 46L, 7L, 13L,
3L, 19L, 36L),
2009 Apr 23
1
iteration limit error in gamm and notExp2
hi,
I am trying to run a mixed effect gam using gamm (mgcv)
and I get the following error:
"Error in lme.formula(y ~ X - 1, random = rand, data = strip.offset(mf), : nlminb problem, convergence error code = 1
message = iteration limit reached without convergence (9)"
I've read all about 'notExp2' but since I am not an expert I didn't understand that much. I was
2006 May 30
1
Piecewise (broken stick) models in R
Hi there,
I´m a newbie in R and I´m looking for some advice how to teste Piecewise (Broken Stick) models.
I´have another simple question: how can I compute descriptive statistics for data grouped for two or more variables? See below, please.
Year Site Repetition rainfall
1980 1 1 ...
1980 1 2 ...
1980 1 3 ...
1980 2
2006 Sep 27
1
matrix with additional upper, botton, left and right cells
Dear R Gurus,
I have a matrix dim(1000x1000) and I need create a second matrix with dim(1002x1002) and insert my first matrix at position col=2,line=2. Please, see an example below:
0050055050
5550000000
5000505005
5005000500
0055550555
and I need
333333333333
300500550503
355500000003
350005050053
350050005003
300555505553
333333333333
Thanks a
2008 Jul 23
6
Using if, else statements
Hi all,
Again I have searched the net and so on, without finding an answer to this
surely simple problem. A short bit of code would be appreciated.
I have a object named `data' with the following column headings.
Date, maxitemp, minitemp, admissions, d.o.w.
Where d.o.w. is day of the week, written "Sun" "Mon" etc.
I just need to scale the Monday admissions by
2006 Sep 07
2
merging tables by columns AND rows
Hi everyone!
I have 100 tables of the form:
XCOORD,YCOORD,OBSERVATION
27.47500,42.52641,177
27.48788,42.52641,177
27.50075,42.52641,179
27.51362,42.52641,178
27.52650,42.52641,180
27.53937,42.52641,178
27.55225,42.52641,181
27.56512,42.52641,177
27.57800,42.52641,181
27.59087,42.52641,181
27.60375,42.52641,180
27.61662,42.52641,181
..., ..., ...
with approximately 1000000 observations for each.
2006 Nov 07
2
changing image dimensions
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2011 Jul 14
2
R package: pbatR
Dear All,
Does anybody have experience with R package pbatR
(http://cran.r-project.org/web/packages/pbatR/index.html)? I am trying to
use it to analyze the family-based case-control data, but the package
totally doesn?t work on my computer. I contacted the authors of the package,
but I haven?t heard anything from them.
Following the package manual, I tried the simple example as below:
2004 Mar 17
1
ANCOVA when you don't know factor levels
Hello people
I am doing some thinking about how to analyse data on dimorphic animals
- where different individuals of the same species have rather different
morphology. An example of this is that some male beetles have large
horns and small wings, and rely on beating the other guys up to get
access to mates, whereas others have smaller horns and larger wings,
and rely on mobility to
2003 Apr 26
4
array to data.frame
Hi,
How i can convert a array in to data.frame structure?
For example,
vinteesete<-array(c(1,0,6,4,22,29,11,7,6,2,8,7,21,25,5,6,1,0,11,6,14,24,13,10,2,2,15,13,14,17,9,8,1,2,16,9,14,23,9,6,6,2,17,13,10,20,7,5),
dim=c(2,4,6), dimnames=list(grupo=c("I","II"),
opiniao=c("Ma","Regular","Boa","MBoa",),
2004 Sep 18
5
possible libogg bug holding up Ogg FLAC
I wish I would have come across this in time for the libogg-1.1.1
release... Maybe I'm doing something wrong but here it is.
One FLAC compressed frame becomes one packet when encapsulated in
Ogg, and FLAC packets can be much larger than the nominal 4k page
size. For CD audio they are usually 10-15Kbytes. Imagine this
Ogg stream where the lines denote page boundaries and the x's
are one
2010 Jul 07
1
xls.getshlib() error in xlsReadWrite package under W7
Dear all,
I installed xlsReadWrite package under Windows 7, and got error when trying
to run xls.getshlib().
Please, see the errors below:
> require(xlsReadWrite)
Loading required package: xlsReadWrite
xlsReadWrite version (cran shlib)
Copyright (C) 2010 Hans-Peter Suter, Treetron, Switzerland.
!! Your installation contains the cran placeholder shlib (dll/so).
Please get the regular shlib
2006 Nov 03
3
identify extremes positions of values into matrix
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