Displaying 20 results from an estimated 600 matches similar to: "Randomly shuffle an array multiple times"
2010 Dec 17
2
Extract subset of rows
Hi,
I have two matrices with a common field = species what i want to do is make a matrix that combines the data held in the other two based on the species name.
I.e ( simple example)
Matrix 1 - monocot
SPECIES V1
A 2
B 3
C 4
D 5
Matrix 2 - PCAresults
SPECIES V2
A 0.2
B 0.3
C 4.1
D 3.2
matrix 3 - What i want
SPECIES V1 V2
A 2 0.2
B 3 0.3
C 4 4.1
D 5 3.2
my
2010 Oct 15
1
Random assignment
Dear List,
I am doing some simulation in R and need basic help!
I have a list of animal families for which i know the number of species in each family.
I am working under the assumption that a species has a 7.48% chance of being at risk.
I want to simulate the number of species expected to be at risk under a random binomial distribution with 10,000 randomizations.
I am relatively knew to
2011 Aug 16
2
Assignment working differently inside ifelse()
Hello all, I need to extract rows and columns from a data frame and put
them in a matrix. In some cases, there are no rows in the data frame
meeting the selection criteria. For those rows I want to put a row of
0's in the matrix. Here's my clumsy code:
tab1.m1 <- matrix(0, nrow=2, ncol=4)
tab1.m1[1,] <- ifelse(length(as.matrix(tab1[tab1$comp==the.comp & tab1$schlid==the.schl
2005 Jul 27
2
How to delete rows
Dear R-users,
I am very new to R, so maybe my question is very easy to answer.
I have the following table:
TAB1<-data.frame(Name,Number), "Name" and "Number" are all character
strings,
it looks like this:
Name Number
ab 2
ab 2
NA 15
NA 15
NA 15
cd 3
ef 1
NA 15
NA 15
gh 15
gh 15
I want to delete all the rows
2013 Apr 10
6
means in tables
Hi.
I have 2 tables, with same dimensions (8000 x 5). Something like:
tab1:
V1 V2 V3 V4 V5
14.23 1.71 2.43 15.6 127
13.20 1.78 2.14 11.2 100
13.16 2.36 2.67 18.6 101
14.37 1.95 2.50 16.8 113
13.24 2.59 2.87 21.0 118
tab2:
V1 V2 V3 V4 V5
1.23 1.1 2.3 1.6 17
1.20 1.8 2.4 1.2 10
1.16 2.6 2.7 1.6 11
1.37 1.5 2.0 1.8 13
1.24 2.9 2.7 2.0 18
I need generate a table of averages, the
2005 Oct 27
2
F tests for random effect models
Dear R-users,
My question is how to get right F tests for random effects in random effect models (I hope this
question has not been answered too many times yet - I didn't find an answer in rhelp archives).
My data are in mca2 (enc.) :
names(mca2)
[1] "Lignee" "Pollinisateur" "Rendement"
dim(mca2)
[1] 100 3
replications(Rendement ~ Lignee *
2008 Feb 13
2
apply on large arrays
I have a big contingency table, approximately of size 60*2*500*500,
and I need to count the number of cells containing a count of 1 for each
of the factors values defining the first dimension.
Here is my attempt:
tab1<-with(pisa1,table(CNT,GENDER,ISCOF,ISCOM))
tab2<-apply(tab1,1:4,function(x)ifelse(sum(x)==1,1,0))
tab3<-apply(tab2,1,sum)
Computing tab2 is very slow.
Is there a faster
2013 Feb 11
2
How to plot doubles series with different location using plotCI
Dear list
members,
I would
like to create two series of plotted mean values and error bars, yet with
different locations along the x-axis.
Plotting of
first series using plotCI with the standard arguments goes without any problem.
However I do not succeed to add the second series in the same plot, which
should be horizontally shifted from the first series along the x-axis. The “add=TRUE”
2010 Jul 25
1
Left Outer Join 2 DF's on Multiple Conditions
Hi,
I am trying to execute the following SQL statement using two data frames:
tab1, tab2 : Two Tables
Select tab1.*, tab2.*, tab1.tobiiTime - tab2.ruiTime as timeDiff,
IFNULL(n-m, -9999999) as alwaysIncrement
FROM tab1
LEFT OUTER JOIN tab2 On tab1.data1 - tab2.mouseX = 0 And tab1.data2 -
tab2.mouseY = 0
I am trying to do the following in R:-
*#Getting error here:*
data
2010 May 26
3
shapiro.test
Hi,
I am not so sure about an error note I got when using shapiro.test.
I imported some data into R by wrinting it into a .txt file via
> tab1<-read.table("etc....txt",header=T)
> attach(tab1)
The following object(s) are masked _by_ .GlobalEnv :
ozon
> ozon$V1 [1] 2.5 3.0 5.6 4.7 6.5 6.7 1.7 5.3 4.6 7.4 5.4 4.1 5.1 5.6 5.4 6.1 7.6[18] 6.2 6.0 5.5 5.8 8.2 3.1 5.8 2.6
Now
2006 Oct 27
3
How to best divide table by table
Hi all,
how can I divide two tables of the same dimension so that all names are
preserved, ie do not become NA? I have "tab1" and "tab2", each having
names in the first column. I want "tab3" with the same names and values
"tab1/tab2".
Thanks,
Serguei
2011 Oct 29
1
Refresh tab content on click in JQuery UI Tabs
HI Guy''s
TAB1 and TAB2 have some radio button, checkbox and dropdown menu. When
TAB1 is selected, I have to switch to TAB2 and then back to TAB1 to refresh
the loaded content.
How to make TAB1 refresh loaded content when click on its tab?
*code is something like that*
<ul class="tabs">
<li><a *href="#tab1"*>Gallery</a></li>
2005 Jun 24
1
comparing strength of association instead of strength of evidence?
Hi,
I asked this question before, which was hidden in a bunch of
questions. I repharse it here and hope I can get some help this time:
I have 2 contingency tables which have the same group variable Y. I
want to compare the strength of association between X1/Y and X2/Y. I
am not sure if comparing p-values IS the way even though the
probability of seeing such "weird" observation under H0
2005 Oct 28
2
Random effect models
Dear R-users,
Sorry for reposting. I put it in another way :
I want to test random effects in this random effect model :
Rendement ~ Pollinisateur (random) + Lignee (random) + Pollinisateur:Lignee (random)
Of course :
summary(aov(Rendement ~ Pollinisateur * Lignee, data = mca2))
gives wrong tests for random effects.
But :
summary(aov1 <- aov(Rendement ~ Error(Pollinisateur * Lignee), data =
2010 Apr 24
2
table command
Hi,
Let s be a dataframe.
> s
A B C
0 0 1
1 0 1
1 0 1
0 0 1
1 0 1
0 1 1
0 1 1
0 1 1
0 0 1
> tab1=table(s[,c(1,2)])
> tab1
B
A 0 1
0 3 3
1 3 0
> tab2=table(s[,c(1,3)])
> tab2
C
A 1
0 6
1 3
The problem is I need to access frequency corresponding to (0,0).
tab1[1] will give me the correct value
2009 Dec 22
2
Nested For loops
Dear R experts,
Might be very simple question to ask but would be insightful. As the same story of nested "for loops". following is the code that I am using to get the autocorrelation function of the sample data. I have tried to get rid of for loops but since I am touching R after such a long time that I need to practice more but I need help to revive my skills. I know that apply() or
2011 Dec 23
3
Applying a function
Hi,
I need help writing a function
I capture seal pups mutliple times during the lactation season in order to
monitor their growth rate. When I release them, the recovery (mother-pup)
time is not the same for all individuals. I want to know if individuals that
recover their mother the fastest are the ones with the highest growth rates.
So, I noted at every release if the pup
2008 Sep 12
2
Fw: Complex sampling survey _ Use of survey package
--------------------------------------------------
From: "Ahoussou Sylvie" <sylvie.ahoussou at antilles.inra.fr>
Sent: Friday, September 12, 2008 9:48 AM
To: "Thomas Lumley" <tlumley at u.washington.edu>
Subject: Re: [R] Complex sampling survey _ Use of survey package
> Thanks for your answer
>
> I think I made a mistake when I recopied the 5 first rows of
2010 Jul 14
2
count - help
Hi,
I have a data frame with several factors and I want to count the occurrences
of an event resulting from an interaction of some factors.
I tried to do several tables (and then converting to d.f and then merge them
by one factor and the freq
Tab1 <- merge (BPorAmost,BPorSector,by=c('Sample','Freq'))
Tab1 <- merge (Tab1,BPorDist,by=c('Sample','Freq'))
Tab1
2010 Jan 07
2
table() and setting useNA to be there by default?
Good morning,
Is there a way to get table() to default to including NAs - as in...
table(..., useNA='ifany') or table(..., useNA='always') or table(...,
exclude=NULL) ?
I can't see a way under table() or options() or searching the archives
(probably using the wrong keyword?).
> t1 <- c(1,2,3,3,3,2,NA,NA,NA,NA)
> table(t1)
t1
1 2 3
1 2 3
I keep forgetting to