Displaying 20 results from an estimated 23 matches for "datframe".
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2018 Apr 17
2
Time intervals in a datframe
Hi all
I have a list of multiple datframes with the same column headers. The last column in each datframe contains a vector of "Interval" class after I have produced this column using "lubridate" package. I needed to convert my list of dataframes to be in a single dataframe for further analysis. I did this using the fol...
2018 Apr 17
0
Time intervals in a datframe
> On Apr 17, 2018, at 10:10 AM, Allaisone 1 <allaisone1 at hotmail.com> wrote:
>
>
> Hi all
>
> I have a list of multiple datframes with the same column headers. The last column in each datframe contains a vector of "Interval" class after I have produced this column using "lubridate" package. I needed to convert my list of dataframes to be in a single dataframe for further analysis. I did this using the fol...
2006 Aug 06
1
ordering by a datframe date
I am hoping for some advice regarding ordering a dataframe, by date.
The dataframe is in the format below.
$story $datepub
story10 1 April 1999
story 90 1 March 2002
story 37 10 July 1985
I want to reorder the entire dataframe so the earliest story is first, and
save the reordered dataframe. The command, 'class' (datepub) reveals
$datepub is a factor variable.
I tried
2010 Oct 26
2
Forcing results from lm into datframe
Hi
I need some help getting results from multiple linear models into a dataframe.
Let me explain the problem.
I have a dataframe with ejection fraction results measured over a number of quartiles and grouped by base_study.
My dataframe (800 different base_studies) looks like
> afvtprelvefs
basestudy quartile ef ef_std entropy
CBP0908020 1 21.6 0.53 3.27
2005 Mar 25
2
tapply and NA value
Hi,
I'm writing for a little help.
I have a dataframe with same NA value and I'd like to obtain the means of the
value of a coloumn grouped by the levels of a factor coloumn of the datframe.
I'm using the function "tapply" but I see that if only a NA value is present
the result is NA.
There is an option to have the correct result or I must use an other function?
Thanks of all
Leonardo
--
Leonardo Lami
lami at faunalia.it www.faunalia.it
Via Colombo 3 - 5101...
2006 Oct 01
3
aggregate function with 'NA'
Dear r-help reader,
I have some problems with the aggregate function.
My datframe looks like
>frame
Day Time V1 V2
1 M 0 3 NA
2 M 0 4 NA
3 M 0 5 2
4 M 1 NA 4
5 M 1 10 6
6 T 0 4 45
7 T 1 4 3
8 T 1 3 2
9 T 1 6 1
I used the aggegate function to obtain the mean in V1 and V2 over the
grouping variable
Time and Day...
2018 May 02
2
using apply
Hi
I have 3 dataframes, a,b,c with 0/1 values...i have to check a condition
for dataframe a and b and then input the rows ids to datframe c . In the if
condition, I AND the 2 rows of from a and b and then see if the result is
equal to one of them.
I have done this using a for loop, however, it takes a long time to execute
with larger dataset..Can you help me do it using apply function so that i
can do it faster?
a
V1.x V2.x V3.x V...
2002 Apr 02
1
"Large" data set: performance issue
...n I tried scan() which is almost OK.
I scan() the first line for var-names, then the rest. the data-matrix get
transposed and as.data.frame()'ed.
the problem is converting the last 1801 variabales to "numeric"-mode.
i use the following snippet:
i <- 23;
while( i <= totCols){
datframe[,i]<-as.numeric(datframe[,i]);
i <- i + 1;
}
each step takes ~2 secs which makes all in all about an hour.
I suppose I do something really stupid. For reading the data I use
datfull<-scan(filename,sep=",",skip=1,what="character")
which gives me a transposed matrix of...
2009 Aug 28
2
Pls package
Hi,
I have managed to format my data into a single datframe consisting of two AsIs response and predictor dataframes in order to supply the plsr command of the pls package for principal components analysis.
When I execute the command, however, I get this error:
> fiber1 <- plsr(respmat ~ predmat, ncomp=1, data=inputmat,validation="LOO")
Err...
2008 Nov 26
1
Creating a vector based on lookup function
...p..help you, help me, if
you know what i mean.
dev=400
#test location model TAZs to reference
cands=c(101,105,109)
#Create Object of length of cands
candslength=length(cands)
#TEST TAZ Vector
CANDS=(100:110)
#Test Dev Vector
TAZDEVS=c(120,220,320,420,520,620,720,820,920,1020,1120)
#Creates datframe of CANDS and DEVS
TAZLIST=data.frame(CANDS,TAZDEVS)
for(i in 1:candslength){
cand=cands[i]
#Creates an object based on the value of "cands" in TAZLIST
TAZDet=TAZLIST[TAZLIST$CANDS==cand[i],2]
}
What i would like to see is TAZDet filled with the "cands" corresponding...
2003 Jul 19
1
Method 'EvaluateNoReturn' of object 'IStatConnector' failed
...ocal variable.
My questions can thus be summarised as ff:
1). How do I call a custom function written in R, using the R ActiveX
library. ?
2). How do I access a dataframe returned from a function call, using the R
ActiveX library. ?
3). Can I / How do I pass arguments into a function (including datframes)
using the R ActiveX library. ?
Many Thanks
PS: I am relatively new to R, and I suspect that my function is not loaded
into R's memory space. When using R in the normal way (i.e. via GUI), I
initially used the source() command to load the function script. However, I
have saved it in t...
2018 May 02
0
using apply
...ooking for.
data. table could also be interesting.
Hth
Ulrik
On Wed, 2 May 2018, 21:28 Neha Aggarwal, <aggarwalneha2000 at gmail.com> wrote:
> Hi
>
> I have 3 dataframes, a,b,c with 0/1 values...i have to check a condition
> for dataframe a and b and then input the rows ids to datframe c . In the if
> condition, I AND the 2 rows of from a and b and then see if the result is
> equal to one of them.
> I have done this using a for loop, however, it takes a long time to execute
> with larger dataset..Can you help me do it using apply function so that i
> can do it fast...
2009 Jan 02
1
Calculating signicance value
...two items whose correlations are being
found
sig_value<-cor.test(corr_dataset)
and also return that :-
return(list(matrix=BPcor,sig=sig_value))
For example recmeanC1 and i1 has to be passed here..as 2 separate
dataframes,shown below if i pass the dataset for (recmeanC1 & i1 ) as as
single datframe,cor.test() function doesn't accept it.Moreover cor()
function took care of what will be crossed with what and the correlation
produced.Now do i have to manually get possible pairs of the column names of
my dataset(shown above dataset 1),and also the data and then pass to
cor.test and calculate...
2012 Jun 25
2
setdiff datframes
hi,
I have 2 files example 1 and example 2 and would like to know what is in
example2 and not in example1 (attached)
V1 contain data which could be in duplicated which I am using as identifiers
I used setdiff(example2$V1,example1$V1) to find the identifiers which
are specific to example2:
[1] "rs2276598" "rs17253672"
I am looking for a way to get an output with all
2001 Aug 17
0
making a neat timetable
...; reper" "reper" ...
$ user : chr "stf" "cal" "bas" "pup" ...
> |> prova[2] actually represents the weekday from Monday to Sunday
>
> I think you mean prova[,2] which is the second column (i.e. once
> you've got it into a datframe form).
Yes of course.
> That's tricky. It might be a good idea to get some experience with
> simpler tasks first. Check out aggregate.data.frame which should get
> most of it sorted for you. Then you'll need to get the hang of
> pasting various vectors together.
Thanks for...
2011 May 23
1
Applying boxplot.stats to multiple value lists
...things such as> upex(testframe$Name)
[1] 100> lapply(testframe, upex)
$Name
[1] 100
$Value
[1] NA> for (x in testframe["Name"]) print(upex(x))
[1] 100 As you can see, I get only one value as an output, so I assume these calls apply the function to the whole set of values in the datframe. Is there a way to make it work as I want it to? I hope my question is understandable enough..
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2007 Nov 13
2
plotting coxph results using survfit() function
i want to make survival plots for a coxph object using survfit
function. mod.phm is an object of coxph class which calculated results
using columns X and Y from the DataFrame. Both X and Y are
categorical. I want survival plots which shows a single line for each
of the categories of X i.e. '4' and 'C'. I am getting the following
error:
> attach(DataFrame)
>
2005 May 26
2
Q: changing the class of an object
Dear All,
I have a list of dataframes, each cell in every
dataframe (after I have cleaned up the dataframes) is
either real or NA but have class character (I think).
I would like to know how to change the class of every
cell without using a for-loop. I currently have this
dataframes <- sapply(1: no.of.subs, function(k)
apply(dataframes[[k]], 2, function(x) {
2013 Dec 03
3
seleccionar columnas de un dataframe mediante variables
Pues este es el culpable... como soy nuevo en esto, disculpad si las
estrategias de creación de datframes, etc. son poco ortodoxas. Y por
cierto... esto del slicing con R es un poco... duro
library(RPostgreSQL)
library(reshape)
#CARGA DE DATOS
conn<-dbConnect("PostgreSQL",dbname="OFIDAT",user="antares")
#consulta<-dbSendQuery(conn,"select
codigo_buque,coales...
2013 Dec 03
0
seleccionar columnas de un dataframe mediante variables
...o - Listas
> Enviado el: martes, 03 de diciembre de 2013 14:18
> Para: r-help-es en r-project.org
> Asunto: Re: [R-es] seleccionar columnas de un dataframe mediante
> variables
>
> Pues este es el culpable... como soy nuevo en esto, disculpad si las
> estrategias de creación de datframes, etc. son poco ortodoxas. Y por
> cierto... esto del slicing con R es un poco... duro
>
> library(RPostgreSQL)
> library(reshape)
> #CARGA DE DATOS
> conn<-dbConnect("PostgreSQL",dbname="OFIDAT",user="antares")
> #consulta<-dbSendQuery(conn,...