[R] cbind in data.frame
hi,
when I used cbind to combine columns, some contents of columns has been
replaced by
number. in the script below, column should be aaa,bbb,ccc but I was given 1,2,3.
but when I change the column to vector, it gave me correct contents. can you
please
tell me why?
> d<-read.table("aaa.txt")
> d
V1 V2
1 aaa 123
2 bbb 345
3 ccc 986
> cbind(d[,1],d[,2])
[,1] [,2]
[1,] 1 123
[2,] 2 345
[3,] 3 986
> cbind(as.vector(d[,1]),d[,2])
[,1] [,2]
[1,] "aaa" "123"
[2,] "bbb" "345"
[3,] "ccc" "986"
>
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Re: [R] cbind in data.frame
Thanks Charles,
when I use cbind.data.frame(), the column was not replaced by number.
I could not find information about cbind.data.frame. what is the machineism of
cbind.data.frame?
cheers
Yu
--- On Mon, 8/25/08, Charles Plessy <[EMAIL PROTECTED]> wrote:
From: Charles Plessy <[EMAIL PROTECTED]>
Subject: Re: [R] cbind in data.frame
To: r-help@r-project.org
Date: Monday, August 25, 2008, 6:09 AM
Le Sun, Aug 24, 2008 at 10:56:43PM -0700, Yuan Jian a écrit :
> hi,
> when I used cbind to combine columns, some contents of columns has been
replaced by
> number. in the script below, column should be aaa,bbb,ccc but I was given
1,2,3.
> but when I change the column to vector, it gave me correct contents. can
you please
> tell me why?
> ?
> > d<-read.table("aaa.txt")
Hello,
read.table converts characters to factors. Factors will be converted
to numbers by cbind, as in the following example:
> toto <- c("aaa","bbb","aaa")
> toto
[1] "aaa" "bbb" "aaa"
> as.factor(toto)
[1] aaa bbb aaa
Levels: aaa bbb
> cbind(as.factor(toto))
[,1]
[1,]1
[2,]2
[3,]1
The 'as.is' or 'colClasses' option of read.table will help you
to prevent the
conversion of characters to factors.
Have a nice day,
--
Charles Plessy
http://charles.plessy.org
Tsurumi, Kanagawa, Japan
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[R] add to vector without duplicatation
Hi, I try to add items to a vector, but when the it has existed, the item should be skipped. does anyone know how to do it a simple way? Yu [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] lost attrubute:names
Hi,
when I pick out one element from a matrix, the attribute name is kept, but when
more than one elements are extracted, the attribute name lost;
>a<-matrix(c(1,2,3,11,12,13,45,56,76),ncol=3,dimnames=list(c(),c("c1","c2","c3")))
> k<-a[a[,"c3"]>50,"c3"]
> kk<-a[a[,"c3"]>60,"c3"]
> attributes(k)
NULL
> attributes(kk)
$names
[1] "c3"
YU
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[R] remove levels from a factor
Hi,
how to remove levels that have less than a specific number such as 2. i.e..
> f<-as.factor(c("a","b","a"))
> f
[1] a b a
Levels: a b
I want to remove level b because level b has less than 2.
> f
[1] a a
Levels: a
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[R] remove low frequent rows
Hi,
I have a matrix.
>a<-cbind(c("a","b","a"),c(4,3,6))
[,1] [,2]
[1,] "a" "4"
[2,] "b" "3"
[3,] "a" "6"
I want to remove rows in matrix a whose first column has frequency less than 2.
in about example matrix a becomes
[,1] [,2]
[1,] "a" "4"
[2,] "a" "6"
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[R] give all combinations
Hello,
is there a simple way to give all combinations for a given vector:
v<-c("a","b","c")
combination(v,v) becomes
"aa","ab","ac","bb","bc","cc'
combination(v,v,v) becomes
"aaa","aab","aac","abb",..
[[alternative HTML version deleted]]
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Re: [R] give all combinations
thanks.
how to remove the combinations that has same ingredients:
in C, the following sentences are used.
for i = 1 to 3
for "a b a", "a a b" and "b a a", only one of them is kept, others are remove.
v<-c("a","b","c")
v v should be aa, ab, ac, bc
--- On Sun, 8/31/08, Lucien Lemmens <[EMAIL PROTECTED]> wrote:
From: Lucien Lemmens <[EMAIL PROTECTED]>
Subject: Re: [R] give all combinations
To: [EMAIL PROTECTED]
Date: Sunday, August 31, 2008, 8:38 AM
Yuan Jian yahoo.com> writes:
>
> Hello,
>
> is there a simple way to give all combinations for a given vector:
>
> v<-c("a","b","c")
>
> combination(v,v) becomes
>
"aa","ab","ac","bb","bc","cc'
>
> combination(v,v,v) becomes
> "aaa","aab","aac","abb",..
>
vv<-c(outer(v,v,paste))
vv
[1] "a a" "b a" "c a" "a b" "b
b" "c b" "a c" "b c" "c c"
vvv<-c(outer(vv,v,paste)
vvv
[1] "a a a" "b a a" "c a a" "a b a"
"b b a" "c b a" "a c a" "b c a"
"c c a" "a a b" "b a b" "c a b" "a
b b" "b b b"
"c b b"
[16] "a c b" "b c b" "c c b" "a a c"
"b a c" "c a c"
"a b c" "b b c" "c b c" "a c c" "b
c c" "c c c"
>
>
>
> [[alternative HTML version deleted]]
>
>
>
> __
> R-help r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
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Re: [R] give all combinations
thanks.
how to remove the combinations that has same ingredients:
in C, the following sentences are used.
for i = 1 to 3
for "a b a", "a a b" and "b a a", only one of them is kept, others are remove.
v<-c("a","b","c")
v v should be aa, ab, ac, bc
--- On Sun, 8/31/08, Lucien Lemmens <[EMAIL PROTECTED]> wrote:
From: Lucien Lemmens <[EMAIL PROTECTED]>
Subject: Re: [R] give all combinations
To: [EMAIL PROTECTED]
Date: Sunday, August 31, 2008, 8:38 AM
Yuan Jian yahoo.com> writes:
>
> Hello,
>
> is there a simple way to give all combinations for a given vector:
>
> v<-c("a","b","c")
>
> combination(v,v) becomes
>
"aa","ab","ac","bb","bc","cc'
>
> combination(v,v,v) becomes
> "aaa","aab","aac","abb",..
>
vv<-c(outer(v,v,paste))
vv
[1] "a a" "b a" "c a" "a b" "b
b" "c b" "a c" "b c" "c c"
vvv<-c(outer(vv,v,paste)
vvv
[1] "a a a" "b a a" "c a a" "a b a"
"b b a" "c b a" "a c a" "b c a"
"c c a" "a a b" "b a b" "c a b" "a
b b" "b b b"
"c b b"
[16] "a c b" "b c b" "c c b" "a a c"
"b a c" "c a c"
"a b c" "b b c" "c b c" "a c c" "b
c c" "c c c"
>
>
>
> [[alternative HTML version deleted]]
>
>
>
> __
> R-help r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
__
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[[alternative HTML version deleted]]
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] give all combinations
thanks.
how to remove the combinations that has same ingredients:
in C, the following sentences are used.
for i = 1 to 3
for "a b a", "a a b" and "b a a", only one of them is kept, others are remove.
v<-c("a","b","c")
v v should be aa, ab, ac, bc
--- On Sun, 8/31/08, Lucien Lemmens <[EMAIL PROTECTED]> wrote:
From: Lucien Lemmens <[EMAIL PROTECTED]>
Subject: Re: [R] give all combinations
To: [EMAIL PROTECTED]
Date: Sunday, August 31, 2008, 8:38 AM
Yuan Jian yahoo.com> writes:
>
> Hello,
>
> is there a simple way to give all combinations for a given vector:
>
> v<-c("a","b","c")
>
> combination(v,v) becomes
>
"aa","ab","ac","bb","bc","cc'
>
> combination(v,v,v) becomes
> "aaa","aab","aac","abb",..
>
vv<-c(outer(v,v,paste))
vv
[1] "a a" "b a" "c a" "a b" "b
b" "c b" "a c" "b c" "c c"
vvv<-c(outer(vv,v,paste)
vvv
[1] "a a a" "b a a" "c a a" "a b a"
"b b a" "c b a" "a c a" "b c a"
"c c a" "a a b" "b a b" "c a b" "a
b b" "b b b"
"c b b"
[16] "a c b" "b c b" "c c b" "a a c"
"b a c" "c a c"
"a b c" "b b c" "c b c" "a c c" "b
c c" "c c c"
>
>
>
> [[alternative HTML version deleted]]
>
>
>
> __
> R-help r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
__
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] give all combinations
thanks.
how to remove the combinations that has same ingredients:
in other computer language, the following sentences are used.
for i = 1 to 3
for j = i+1 to 3
for "a b a", "a a b" and "b a a", only one of them is kept, others are remove.
v<-c("a","b","c")
v v should be aa, ab, ac, bc
--- On Sun, 8/31/08, Lucien Lemmens <[EMAIL PROTECTED]> wrote:
From: Lucien Lemmens <[EMAIL PROTECTED]>
Subject: Re: [R] give all combinations
To: [EMAIL PROTECTED]
Date: Sunday, August 31, 2008, 8:38 AM
Yuan Jian yahoo.com> writes:
>
> Hello,
>
> is there a simple way to give all combinations for a given vector:
>
> v<-c("a","b","c")
>
> combination(v,v) becomes
>
"aa","ab","ac","bb","bc","cc'
>
> combination(v,v,v) becomes
> "aaa","aab","aac","abb",..
>
vv<-c(outer(v,v,paste))
vv
[1] "a a" "b a" "c a" "a b" "b
b" "c b" "a c" "b c" "c c"
vvv<-c(outer(vv,v,paste)
vvv
[1] "a a a" "b a a" "c a a" "a b a"
"b b a" "c b a" "a c a" "b c a"
"c c a" "a a b" "b a b" "c a b" "a
b b" "b b b"
"c b b"
[16] "a c b" "b c b" "c c b" "a a c"
"b a c" "c a c"
"a b c" "b b c" "c b c" "a c c" "b
c c" "c c c"
>
>
>
> [[alternative HTML version deleted]]
>
>
>
> __
> R-help r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
__
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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[[alternative HTML version deleted]]
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] give all combinations
thanks.
how to remove the combinations that has same ingredients:
in other computer language, the following sentences are used.
for i = 1 to 3
for j = i+1 to 3
for "a b a", "a a b" and "b a a", only one of them is kept, others are remove.
v<-c("a","b","c")
v v should be aa, ab, ac, bc
--- On Sun, 8/31/08, Lucien Lemmens <[EMAIL PROTECTED]> wrote:
From: Lucien Lemmens <[EMAIL PROTECTED]>
Subject: Re: [R] give all combinations
To: [EMAIL PROTECTED]
Date: Sunday, August 31, 2008, 8:38 AM
Yuan Jian yahoo.com> writes:
>
> Hello,
>
> is there a simple way to give all combinations for a given vector:
>
> v<-c("a","b","c")
>
> combination(v,v) becomes
>
"aa","ab","ac","bb","bc","cc'
>
> combination(v,v,v) becomes
> "aaa","aab","aac","abb",..
>
vv<-c(outer(v,v,paste))
vv
[1] "a a" "b a" "c a" "a b" "b
b" "c b" "a c" "b c" "c c"
vvv<-c(outer(vv,v,paste)
vvv
[1] "a a a" "b a a" "c a a" "a b a"
"b b a" "c b a" "a c a" "b c a"
"c c a" "a a b" "b a b" "c a b" "a
b b" "b b b"
"c b b"
[16] "a c b" "b c b" "c c b" "a a c"
"b a c" "c a c"
"a b c" "b b c" "c b c" "a c c" "b
c c" "c c c"
>
>
>
> [[alternative HTML version deleted]]
>
>
>
> __
> R-help r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
__
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] give all combinations
thanks.
how to remove the combinations that has same ingredients:
in other computer language, the following sentences are used.
for i = 1 to 3
for j = i+1 to 3
for "a b a", "a a b" and "b a a", only one of them is kept, others are remove.
v<-c("a","b","c")
v v should be aa, ab, ac, bc
--- On Sun, 8/31/08, Lucien Lemmens <[EMAIL PROTECTED]> wrote:
From: Lucien Lemmens <[EMAIL PROTECTED]>
Subject: Re: [R] give all combinations
To: [EMAIL PROTECTED]
Date: Sunday, August 31, 2008, 8:38 AM
Yuan Jian yahoo.com> writes:
>
> Hello,
>
> is there a simple way to give all combinations for a given vector:
>
> v<-c("a","b","c")
>
> combination(v,v) becomes
>
"aa","ab","ac","bb","bc","cc'
>
> combination(v,v,v) becomes
> "aaa","aab","aac","abb",..
>
vv<-c(outer(v,v,paste))
vv
[1] "a a" "b a" "c a" "a b" "b
b" "c b" "a c" "b c" "c c"
vvv<-c(outer(vv,v,paste)
vvv
[1] "a a a" "b a a" "c a a" "a b a"
"b b a" "c b a" "a c a" "b c a"
"c c a" "a a b" "b a b" "c a b" "a
b b" "b b b"
"c b b"
[16] "a c b" "b c b" "c c b" "a a c"
"b a c" "c a c"
"a b c" "b b c" "c b c" "a c c" "b
c c" "c c c"
>
>
>
> [[alternative HTML version deleted]]
>
>
>
> __
> R-help r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
__
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] give all combinations
thanks.
how to remove the combinations that has same ingredients:
in other computer language, the following sentences are used.
for i = 1 to 3
for j = i+1 to 3
for "a b a", "a a b" and "b a a", only one of them is kept, others are remove.
v<-c("a","b","c")
v v should be aa, ab, ac, bc
--- On Sun, 8/31/08, Lucien Lemmens <[EMAIL PROTECTED]> wrote:
From: Lucien Lemmens <[EMAIL PROTECTED]>
Subject: Re: [R] give all combinations
To: [EMAIL PROTECTED]
Date: Sunday, August 31, 2008, 8:38 AM
Yuan Jian yahoo.com> writes:
>
> Hello,
>
> is there a simple way to give all combinations for a given vector:
>
> v<-c("a","b","c")
>
> combination(v,v) becomes
>
"aa","ab","ac","bb","bc","cc'
>
> combination(v,v,v) becomes
> "aaa","aab","aac","abb",..
>
vv<-c(outer(v,v,paste))
vv
[1] "a a" "b a" "c a" "a b" "b
b" "c b" "a c" "b c" "c c"
vvv<-c(outer(vv,v,paste)
vvv
[1] "a a a" "b a a" "c a a" "a b a"
"b b a" "c b a" "a c a" "b c a"
"c c a" "a a b" "b a b" "c a b" "a
b b" "b b b"
"c b b"
[16] "a c b" "b c b" "c c b" "a a c"
"b a c" "c a c"
"a b c" "b b c" "c b c" "a c c" "b
c c" "c c c"
>
>
>
> [[alternative HTML version deleted]]
>
>
>
> __
> R-help r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
__
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
[[alternative HTML version deleted]]
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] give all combinations
thanks.
how to remove the combinations that has same ingredients:
in C, the following sentences are used.
for i = 1 to 3
for "a b a", "a a b" and "b a a", only one of them is kept, others are remove.
v<-c("a","b","c")
v v should be aa, ab, ac, bc
--- On Sun, 8/31/08, Lucien Lemmens <[EMAIL PROTECTED]> wrote:
From: Lucien Lemmens <[EMAIL PROTECTED]>
Subject: Re: [R] give all combinations
To: [EMAIL PROTECTED]
Date: Sunday, August 31, 2008, 8:38 AM
Yuan Jian yahoo.com> writes:
>
> Hello,
>
> is there a simple way to give all combinations for a given vector:
>
> v<-c("a","b","c")
>
> combination(v,v) becomes
>
"aa","ab","ac","bb","bc","cc'
>
> combination(v,v,v) becomes
> "aaa","aab","aac","abb",..
>
vv<-c(outer(v,v,paste))
vv
[1] "a a" "b a" "c a" "a b" "b
b" "c b" "a c" "b c" "c c"
vvv<-c(outer(vv,v,paste)
vvv
[1] "a a a" "b a a" "c a a" "a b a"
"b b a" "c b a" "a c a" "b c a"
"c c a" "a a b" "b a b" "c a b" "a
b b" "b b b"
"c b b"
[16] "a c b" "b c b" "c c b" "a a c"
"b a c" "c a c"
"a b c" "b b c" "c b c" "a c c" "b
c c" "c c c"
>
>
>
> [[alternative HTML version deleted]]
>
>
>
> __
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Re: [R] give all combinations
thanks.
how to remove the combinations that has same ingredients:
v<-c("a","b","c")
v.v becomes ab, ac, bc (aa,bb,cc are removed)
v.v.v becomes abc (aaa,aab,... are removed, because they have same ingredients)
that is.
the following sentences can be used.
for(i in 1:3){
for (j in i+1:3){
v.v<-c(v.v,paste(v[i],v[j]))
}
}
is there simpler way to do?
thanks
Yu
--- On Sun, 8/31/08, Lucien Lemmens <[EMAIL PROTECTED]> wrote:
From: Lucien Lemmens <[EMAIL PROTECTED]>
Subject: Re: [R] give all combinations
To: [EMAIL PROTECTED]
Date: Sunday, August 31, 2008, 8:38 AM
Yuan Jian yahoo.com> writes:
>
> Hello,
>
> is there a simple way to give all combinations for a given vector:
>
> v<-c("a","b","c")
>
> combination(v,v) becomes
>
"aa","ab","ac","bb","bc","cc'
>
> combination(v,v,v) becomes
> "aaa","aab","aac","abb",..
>
vv<-c(outer(v,v,paste))
vv
[1] "a a" "b a" "c a" "a b" "b
b" "c b" "a c" "b c" "c c"
vvv<-c(outer(vv,v,paste)
vvv
[1] "a a a" "b a a" "c a a" "a b a"
"b b a" "c b a" "a c a" "b c a"
"c c a" "a a b" "b a b" "c a b" "a
b b" "b b b"
"c b b"
[16] "a c b" "b c b" "c c b" "a a c"
"b a c" "c a c"
"a b c" "b b c" "c b c" "a c c" "b
c c" "c c c"
>
>
>
> [[alternative HTML version deleted]]
>
>
>
> __
> R-help r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
__
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
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and provide commented, minimal, self-contained, reproducible code.
[R] programming
Hi, I am looking for R editor. does anyone know good editor? which tells you syntax error and it has function to beautify format (insert TAB etc.). Yu [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
