Displaying 20 results from an estimated 13936 matches for "v2".
2008 Jan 13
4
For Loop performance
Hello,
Newbie question and hope you can help .
I have two vector V1 and V2, where length(V2) = length of (V1) * 2;
length(V1) ~ 16,000.
For each member in V1, I need to compare 2 element of V2 for equality
i.e.
for (I in 1:length (V1)) {
if ( v2[i] == v1[i] & v2[i+1]==v1[i] ){
statement_1
statement_2
.
}
}
This...
2012 Dec 01
5
How to built a pivot table of value
Hi R users
Imagine the table "base":
p=c("d","d","b","b","a","a")
q=c("v1","v2","v1","v2","v1","v2")
r=c(5,2,4,8,9,7)
base=data.frame(p,q,r)
base
p q r
1 d v1 5
2 d v2 2
3 b v1 4
4 b v2 8
5 a v1 9
6 a v2 7
How programming R to get this result:
v1 v2
a 9 7
b...
2020 Jun 27
0
[centos/centos.org] branch master updated: Updated page for AWS AMI images ID and link
...ages.csv
+++ b/_data/aws-images.csv
@@ -1,50 +1,81 @@
"Version","Region","Architecture","AMI ID","Deploy link"
-"CentOS 8","us-east-1","x86_64","ami-01ca03df4a6012157","https://console.aws.amazon.com/ec2/v2/home?region=us-east-1#LaunchInstanceWizard:ami=ami-01ca03df4a6012157"
-"CentOS 8","us-east-1","x86_64","ami-01ca03df4a6012157","https://console.aws.amazon.com/ec2/v2/home?region=us-east-1#LaunchInstanceWizard:ami=ami-01ca03df4a6012157"
-"C...
2010 Apr 03
4
question difference of roaming profile between WinXP and Win7
Hello
I want to add Win7 machine to my Samba PDC with WinXP clients. Google tells me I have to add a .V2 to my profiles. The samba log ask about a .v2 share.
Can someone explain me the difference of the v2 extension at the profile names and the roaming profile share?
Following my settings:
smb.conf:
[global]
logon path = \\%L\nt-profile
logon home = \\%L\nt-profile
[nt-profile]...
2020 Nov 12
0
[centos/centos.org] branch master updated: Reflected new 7.9.2009 release and updated AMI IDs for AWS
...t a/_data/aws-images.csv b/_data/aws-images.csv
index 4d6c7a9..c583962 100644
--- a/_data/aws-images.csv
+++ b/_data/aws-images.csv
@@ -39,43 +39,43 @@
" CentOS Linux 8 ","eu-north-1","aarch64","ami-02e921ca8f16f9ee4","https://console.aws.amazon.com/ec2/v2/home?region=eu-north-1#LaunchInstanceWizard:ami=ami-02e921ca8f16f9ee4"
" CentOS Linux 8 ","me-south-1","aarch64","ami-0699d4d858abc9036","https://console.aws.amazon.com/ec2/v2/home?region=me-south-1#LaunchInstanceWizard:ami=ami-0699d4d858abc9036&qu...
2006 Apr 21
3
Creat new column based on condition
Hi,
How can I accomplish this task in R?
V1
10
20
30
10
10
20
Create a new column V2 such that:
If V1 = 10 then V2 = 4
If V1 = 20 then V2 = 6
V1 = 30 then V2 = 10
So the O/P looks like this
V1 V2
10 4
20 6
30 10
10 4
10 4
20 6
Thanks in advance.
Sachin
__________________________________________________
[[...
2012 Mar 28
1
Changing multiple instances in data.frame
...d but I cannot find a more elegant solution.
I would like to be able to scan through a data.frame and remove multiple
and various instances of certain contents.
A trivial example is below. It works, it just seems like there should be a
one line solution.
#Example data:
a <-
data.frame(V1=1:3,V2=c(paste(LETTERS[1],LETTERS[1:3],sep='')),options(stringsAsFactors
= FALSE))
#> a
# V1 V2
#1 1 AA
#2 2 AB
#3 3 AC
#Cumbersome solution (which would be even more cumbersome with real data)
indices.of.aa <- which(a$V2 %in% "AA")
indices.of.ab <- which(a$V2 %in% "A...
2008 Oct 01
3
"tapply versus by" in function with more than 1 arguments
...er of rows
nr = 10
#the third column is to enforce that I need correlation on two variables only
dataf = as.data.frame(matrix(c(rnorm(nr),rnorm(nr)*2,runif(nr),sort(c(1,1,2,2,3,3,sample(1:3,nr-6,replace=TRUE)))),ncol=4))
names(dataf)[4] = "class"
#> dataf
# V1 V2 V3 class
#1 0.56933020 1.2529931 0.30774422 1
#2 0.41702299 -1.6441547 0.76140046 1
#3 -1.07671647 -4.8747575 0.43706944 1
#4 -1.97701167 1.3015196 0.04390175 2
#5 0.56501325 1.8597720 0.08174124 2...
2009 Nov 08
5
look up and Missing
HI R-Users
Assume that I have a data frame 'temp' with several variables (v1,v2,v3,v4,v5.).
v1 v2 v3 v4 v5
1 2 3 3 6
5 2 4 2 0
2 -9 5 4 3
6 2 1 3 4
1, I want to look at the entire row values of when v2 =-9
like
2 -9 5 4 3
I wrote
K<- list(if(temp$v2)==-9))
I wrote the like this but it gave me which is no...
2006 Jul 30
2
NIST StRD linear regression
...precision.
I am using R 2.3.1 for Windows XP.
rm(list=ls())
require(gsubfn)
defaultPath <- "my path"
data.base <- "http://www.itl.nist.gov/div898/strd/lls/data/LINKS/DATA"
reg.data <- paste(data.base, "/Filip.dat", sep="")
model <-
"V1~V2+I(V2^2)+I(V2^3)+I(V2^4)+I(V2^5)+I(V2^6)+I(V2^7)+I(V2^8)+I(V2^9)+I
(V2^10)"
filePath <- paste(defaultPath, "//NISTtest.dat", sep="")
download.file(reg.data, filePath, quiet=TRUE)
A <- read.table(filePath, skip=60, strip.white=TRUE)
lm.data <- lm(formula(model), A)...
2011 Aug 06
4
row*matrix
Hi all, I'm learning R. I'm used to Matlab and am having the following issue:
I define a column vector and matrix and then multiply them. The result is
not what I expect:
v2 <- c(0,1,0)
M <- cbind(c(1,4,7),c(2,5,8),c(3,6,9))
M*v2
[,1] [,2] [,3]
[1,] 0 0 0
[2,] 4 5 6
[3,] 0 0 0
I expect the result to be a column, specifically the 2nd column of M.
Now I want to left multiply the matrix by a row vector, and I get errors:
t(v2)*M
Er...
2010 Feb 08
1
Follow-up Question: data frames; matching/merging
Wow.. thanks for the deluge of responses!
Aggregate seems like the way to go here.
But, suppose that instead of integers in column V2, I actually have
dates (and instead of keeping the minimum integer, I want to keep the
earliest date):
> df = data.frame(V1=c(1,1,2,3,1,2),V2=c('2002-03-13','1989-03-10','1988-01-20','1997-05-15','1996-11-18','2000-01-12'));
> aggregate(df$V2,d...
2006 Nov 01
4
extract values from a vector
Hello,
I'm looking for a solution for the following problem:
I have two vectors
V1 <- c("apple","honey","milk","bread","butter")
V2 <- c("bread","milk")
now, I would like to know for each element in V1 if it's equal to one of
the elements in V2
I could do:
which(V1 == V2[1] | V1 == V2[2])
but what if I don't know the length of V2 and it's content???
Thank you in advance!
Antje
2012 Oct 07
2
Reshape2, melt, order of categorical variable and ggplot2
Hello everyone,
I have the following data frame:
> df
V1 V2 V3
1 bench1_10 16675 16678
2 bench1_10 16585 16672
3 bench1_100 183924 185563
4 bench1_100 169310 184806
5 bench1_300 514430 516834
6 bench1_300 510743 514062
7 bench1_500 880146 877882
8 bench1_500 880146 857359
9 bench1_1k 880146 1589600
10 bench1_1k 880146 1709990
&...
2004 Sep 08
4
factor always have type integer
...nteger",
independently of the type of the levels.
This has a strange side effect.
When a variable is "imported" into a data frame,
its type changes.
character variables automatically are converted
to factors when imported into data frames.
Here is an example:
> v1<-1:3
> v2<-c("a","b","c")
> df<-data.frame(v1,v2)
> typeof(v2)
[1] "character"
> typeof(df$v2)
[1] "integer"
It is somewhat surprising that
the types of v2 and df$v2 are different.
the answer is to do
levels(df$v2)[df$v2]
but that is somew...
2012 Sep 26
5
create new column in a DF according to values from another column
Hi everyone,
I have a small problem in my R-code.
Imagine this DF for example:
DF <- data.frame(number=c(1,4,7,3,11,16,14,17,20,19),data=c(1:10))
I would like to add a new column "Station" in this DF. This new column must
be automatically filled with: "V1" or "V2" or "V3".
The choice must be done on the numbers (1st column).
For example, I would like to have "V1" in the column "Station" in the rows
where the numbers of the 1st column are: 1,7,11,16 ; then I would like to
have "V2" in the rows where the numbers a...
2005 Dec 06
3
merging with aggregating
Dear List,
I have two data.frame of the following form:
A:
n V1 V2
1 12 0
2 10 8
3 3 8
4 8 4
6 7 3
7 12 0
8 1 0
9 18 0
10 1 0
13 2 0
B:
n V1 V2
1 0 2
2 0 3
3 1 9
4 12 8
5 2 9
6 2 9
8 2 0
10 4 1
11 7 1
12 0 1
Now I want to merge those frame to one data.frame with summing up the
columns V1 and V2 but not...
2009 Apr 23
2
conditional grouping of variables: ave or tapply or by or???
Dear R Users,
I have the following data frame:
v1 <- c(rep(10,3),rep(11,2))
v2 <- sample(5:10, 5, replace = T)
v3 <- c(0,1,2,0,2)
df <- data.frame(v1,v2,v3)
> df
v1 v2 v3
1 10 9 0
2 10 5 1
3 10 6 2
4 11 7 0
5 11 5 2
I want to add a new column v4 such that its values are equal to the value
of v2 conditional on v3=0 for each subgroup of v1. In the above...
2008 Sep 05
1
binary order combinations
Dear all!
I have a vector of names
names<-("V1", "V2", "V3",....., "V15")
I could create all possible combinations of these names (of all
lengths) using R:
combos<-lapply(1:15,function(x)
{combn(names,x)
})
I get a list with all possible combinations of elements of 'names'
that looks like this (just the very beg...
2015 Feb 18
2
[LLVMdev] local variable in Pattern definition?
Hi guys,
When I am trying to define pattern in a multi class, I got something like this:
“
multi class P_PAT<string sty, SDNode tNode>
{
def : Pat<( !cast<ValueType>(“v2” # sty) (tNode !cast<ValueType>(“v2” # sty):$src1, !cast<ValueType>(“v2” # sty):$src2) ),
( add !cast<ValueType>(“v2” # sty):$src1, !cast<ValueType>(“v2” # sty):$src2) >;
}
“
noticed that in the above pattern, the "!cast<ValueType>(“v2” # s...