Lots of ways to do this, I use %in% with bracket notation [row, column].
The empty column argument below returns all columns but you could have
conditional logic there as well.
dd[dd$rows %in% test_rows, ]
On Mon, Jun 8, 2015 at 6:44 PM, Bogdan Tanasa wrote:
> Dear all,
>
> would appreciate y
Use is.element(elements,set), or its equivalent, elements %in% set:
df <- data.frame(dd = c(1, 2, 3),
rows = c("A1", "A2", "A3"),
columns = c("B1", "B2", "B3"),
numbers = c(400, 500, 600))
test_rows <-c("A1","A3")
df[ is.element(df$rows, test_rows
Dear all,
would appreciate your suggestions on subsetting a dataframe : please let's
consider an example dataframe df:
dd<-c(1,2,3)
rows<-c("A1","A2","A3")
columns<-c("B1","B2","B3")
numbers <- c(400, 500, 600)
df <- dataframe(dd,rows,columns, numbers)
and a vector : test_rows <-c("A1","A3") ;
t; -Original Message-
> From: r-help-boun...@r-project.org
> [mailto:r-help-boun...@r-project.org] On Behalf Of Sneha Bishnoi
> Sent: Thursday, March 27, 2014 11:06 AM
> To: Sarah Goslee
> Cc: r-help
> Subject: Re: [R] Subsetting a dataframe by dynamic column name
>
> Hi Sara
e
Cc: r-help
Subject: Re: [R] Subsetting a dataframe by dynamic column name
Hi Sarah,
Thanks! Do agree its over complicated.
However looking at the solutions I think I did not state my
problem
completely.
V provides choices for only certain set of columns in Finaldata.
So v2 may not represent al
Hi Sarah,
Thanks! Do agree its over complicated.
However looking at the solutions I think I did not state my problem
completely.
V provides choices for only certain set of columns in Finaldata.
So v2 may not represent all columns of Finaldata.
I want to retain columns not provided as a choice for
There are many ways. You're making it overly complicated
Here, in an actual reproducible example (as you were requested to submit):
V <- data.frame(v1=c(1,0,0), v2=c("Shape", "Length", "Rate"),
stringsAsFactors=FALSE)
Finaldata <- data.frame(Shape = runif(5), Length = runif(5), Rate = runif(5))
Hi all!
I am trying to drop columns from a data frame dynamically depending on user
input. The dataframe whose columns need to be dropped is called "Finaldata"
So here is what I do:
V is a dataframe with columns v1 and v2 as follows
v1 v2
1 1 Shape
2 0 Length
3 0
Thanks all for your help.
Anjan
On Sun, Oct 24, 2010 at 1:38 PM, Jorge Ivan Velez
wrote:
> Hi Anjan,
>
> Please consider the following example:
>
> > x <- c(2, rep(1, 10))
> > all(x == 1)
> [1] FALSE
> > d <- replicate(10, sample(x, replace = TRUE))
> > d
> [,1] [,2] [,3] [,4] [,5] [,6] [,
Hi Anjan,
Please consider the following example:
> x <- c(2, rep(1, 10))
> all(x == 1)
[1] FALSE
> d <- replicate(10, sample(x, replace = TRUE))
> d
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10]
[1,]111111211 1
[2,]11121
Hi,
I have a dataframe with 43 columns and a 1000 rows. Each entry in the
dataframe can be either P or A.
here is a small chunk:
c1c2 ...c43
r100 P A ... P
r101 A A ... A
r102 P P ... P
How does one subset this data frame to select those rows t
> -Original Message-
> From: r-help-boun...@r-project.org
> [mailto:r-help-boun...@r-project.org] On Behalf Of yjmha69
> Sent: Friday, June 04, 2010 12:28 PM
> To: R-help@r-project.org
> Subject: [R] subsetting a dataframe
>
> Hi there,
> > a<-data.fram
Hi there,
> a<-data.frame(c(1,2,2,5,9,9),c("A","B","C","D","E","F"))
> names(a)<-c("x1","x2")
> max(table(a$x1))
[1] 2
>
The above shows the max count for x1 is 2, which is correct. But we can't tell
there are 2 groups that meet this criteria: 2,2 and 9,9.
I then want to extract the records
Try this:
subset(x, eval(parse(text=filter)))
On Wed, Jul 8, 2009 at 4:46 PM, Tracey Frescino wrote:
> Hi,
>
> I am trying to subset a dataset based on a filter defined by a user...
> I prompt the user for input.. resulting in a string logical expression
> ("X1 < 3").
>
> I have tried using su
Hi,
I am trying to subset a dataset based on a filter defined by a user...
I prompt the user for input.. resulting in a string logical expression
("X1 < 3").
I have tried using subset, but it is looking for a logical expression, not
a character string.
I keep getting the error: 'subset' must
On 3/4/2008 8:41 AM, John Sorkin wrote:
> windows XP
> R 2.6.0
>
> I am having problems deleting a row from a data frame. I create my dataframe
> by subsetting a larger dataframe:
>
> ShortLavin<-Lavin[Lavin[,"Site"]=="PP" | Lavin[,"Site"]=="CC" |
> Lavin[,"Site"]=="FH",]
I would do that in
/(0)16/337015
Web: http://med.kuleuven.be/biostat/
http://www.student.kuleuven.be/~m0390867/dimitris.htm
- Original Message -
From: "John Sorkin" <[EMAIL PROTECTED]>
To:
Sent: Tuesday, March 04, 2008 2:41 PM
Subject: [R] subsetting a dataframe
> windows XP
&g
On Tue, 4 Mar 2008, John Sorkin wrote:
> windows XP
> R 2.6.0
>
> I am having problems deleting a row from a data frame. I create my dataframe
> by subsetting a larger dataframe:
>
> ShortLavin<-Lavin[Lavin[,"Site"]=="PP" | Lavin[,"Site"]=="CC" |
> Lavin[,"Site"]=="FH",]
>
> I then perform a glm
windows XP
R 2.6.0
I am having problems deleting a row from a data frame. I create my dataframe by
subsetting a larger dataframe:
ShortLavin<-Lavin[Lavin[,"Site"]=="PP" | Lavin[,"Site"]=="CC" |
Lavin[,"Site"]=="FH",]
I then perform a glm using the data frame and plot the results.
fit1poisson
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