Displaying 20 results from an estimated 30000 matches similar to: "evaluate expression on several dataframe columns"
2012 Apr 08
2
xyplot() does not plot legends with "relation=free" scales
Hi all,
I have this problem with lattice that xyplot() won't draw some of my axis labels if the type (i.e. the relation argument) of scales is set as free. For example, in the plot below, I would want it to also show:
1. the labels E1,...E6 below the 10th panel (i.e. 3rd row, 2 col)....just as it is now done below the 12th panel....
2. as well as the labels (2,4,6,8) on the top of panels 1
2006 Nov 08
2
combining dataframes with different numbers of columns
Dear list members,
I have to combine dataframes together. However they contain different
numbers of variables. It is possible that all the variables in the
dataframe with fewer variables are contained in the dataframe with
more variables, though it is not always the case.
There are key variables identifying observations. These could be used
in a merge statement, although this won't
2011 Jul 25
1
Problem with random number simulation
Hi this is my first post. I am trying to run a simulation for a computer
playing Von Neumann poker and adjusting it's expectation of an opponent's
behavior according to how the opponent plays. This program involves random
generation of "hands" and shifting of parameters. However, when I run the
code, no errors come up, but the program doesn't do anything. Could someone
2011 May 04
1
merging multiple columns from two dataframes
Hello,
I have data in a dataframe with 139104 rows which is multiple of 96x1449. i
have a phenotype file which contains the phenotype information for the 96
samples. the snp name is repeated 1449X96 samples. I haveto merge the two
dataframes based on sid and sen. this is how my two dataframes look like
dat<-data.frame(snpname=rep(letters[1:12],12),sid=rep(1:12,each=12),
2012 Jun 03
2
merging single column from different dataframe
Hi all,
probably really simple to solve, but having no background in programming I
haven't been able to figure this out: I have two dataframes like
df1 <- data.frame(names1=c('aa','ab', 'ac', 'ad'), var1=c(1,5,7,12))
df2 <- data.frame(names2=c('aa', 'ab', 'ac', 'ad', 'ae'),
var2=c(3,6,9,12,15))
Now I want merge
2008 May 11
1
Finding unmatched data between two dataframe using several factors
Hi R users
I am trying to find unmatched data from two dataframes. I would like to
find unmatched data based on several factors. For the following data:
dat1 <- data.frame(x = paste("A", 1:6, sep=""),
y = c("andy","bob","ciaran","dan", "eion",
"fred"))
dat1
dat2
2009 Jan 21
3
merging several dataframes from a list
Hi there,
I have a list of dataframes (generated by reading multiple files) and all
dataframes are comparable in dimension and column names. They also have a
common column, which, I'd like to use for merging. To give a simple example of
what I have:
df1 <- data.frame(c(LETTERS[1:5]), c(2,6,3,1,9))
names(df1) <- c("pos", "data")
df3 <- df2 <- df1
df2$data
2012 Dec 11
5
Renaming column names according to another dataframe
Hi,
I've got a dataframe having a code as column name.
Addtionally I have another dataframe with a two columns (and lots of
rows), the first
containing the code and the second some Text (real name).
Now I'd like to use the information (pairs of code and name) of the
second dataframe to rename all the columnnames in the first dataframe.
How is it possible to achieve that?
Here a small
2009 Mar 17
3
Combining columns from two dataframes
I all
I am trying to combine columns from two dataframes to make a completely
new dataframe consisting of one column of dates (ie a combination of
dates from the two dataframes).
>From the following dataframes
a b
1 2008-07-27 1
2 2008-10-01 2
3 2008-08-15 3
4 2008-08-14 4
5 2008-08-14 5
6 2008-09-20 6
c d
1 2008-07-27 1
2 2008-10-01 2
I would like to get:
z
2003 May 30
2
How to remove a complete dataframe column
I am using dataframes and I and I want to delete (remove) a specific
column by name ...
the data frame has 14 columns with several names and only need some.
I tried to overwrite the columns with a single value but that in not very
clean as I need to export the data to file.
The rm command gives me a warning message stating :
< remove: variable "rtu$Ri." was not found >
or there is
2007 Feb 20
1
text.rpart for the "class" method doesn't act on label="yprob"
Hello All,
Am I misreading the documentation?
The text.rpart documentation says:
"label a column name of x$frame; values of this will label the nodes. For
the "class" method, label="yval" results in the factor levels being
used, "yprob" results in the probability of the winning factor level being
used, and ?specific yval level? results in the probability of
2007 Oct 22
3
median value dataframe coming from multiple dataframes
Hi all,
I am not a skillful R programmer and has I am handling with large dataframes (about 30000 x 300) I am in need of an efficient function.
I have 4 dataframes with the same dimension. I need to generate other dataframe with the some dimension than the others where in each position it has the median value of the 4 values in the same position coming from the 4 dataframes.
Grateful by your
2009 May 10
1
Select the rows in a dataframe that matches a criteria in another dataframe
Hi everyone! Thank you for the help you have been given to
me, and here I'm with another problem with my dataframes:
I have two dataframes (with much more observations), like
these:
Dataframe1
Firm Year cash
500400200 2007 100
500400200 2006 200
500400200 2005 400
500400300 2007 300
500400300 2006 240
500400300 2005 120
500400400
2007 May 14
2
creating a "list of 3 dataframes" from a "list of 2 dataframes" and a dataframe?
#I wish to create a "list of three dataframes" ("results2") from a "list of two dataframes" (temp) and a dataframe ("c")?
#Please advise.
a <- data.frame(x=c(1,2,3),y=c(5,7,9))
b <- data.frame(x=c(2,4,7,9),y=c(2,3,5,4))
c <- data.frame(x=c(22,34,7,9),y=c(52,63,5,4))
results1 <- list(a,b,c) #what I want
#but this is how I need to get there
2008 Nov 22
1
applying an operation for several dataframes
Dear R community,
I am trying to apply a simple operation to several dataframes (e.g.
nrow) and cannot get the looping to work. My objective is to get an output
that indicates me the number of rows for every dataframe.
> c
V1 V2 V3 V4 V5 V6 V7 V8 V9 V10
1 1 11 21 31 41 51 61 71 81 91
2 2 12 22 32 42 52 62 72 82 92
3 3 13 23 33 43 53 63 73 83 93
4 4 14 24 34 44 54 64 74 84 94
5 5
2005 Sep 24
1
rpart Error in yval[, 1] : incorrect number of dimensions
I tried using rpart, as below, and got this error message "rpart Error in yval[, 1] : incorrect number of dimensions". Thinking it might somehow be related to the large number of missing values, I tried using complete data, but with the same result. Does anyone know what may be going on, and how to fix it? I have traced two similar error messages in the Archive, but following the
2008 May 15
2
Adding columns to dataframe
Hi,
I have a dataframe SDF1 that looks like this:
Char1 Char2 Char 3 W.2007.02 W.2007.09 W.2007.16 W.2008.13
A C1 F1 F2 F3
A C2
F4
B C3 F5
F6
I have another dataframe SDF2 with 163 cols that has the following column
names
Char1 Char2 Char 3 W.2007.02 W.2007.03 W.2007.04
2009 Mar 21
2
Creating dataframe names on the fly?
I am aware that it is easily possible to create var names on the fly. e.g.
assign(paste("m",i,sep=""),j)
but is it possible to assign dataframes to variables created on the fly?
e.g.
If I have a dataframe called master and I wanted to subset parts of those
data into separate dataframes, I could do:
m1=subset(master,master$SAMPLE=='1')
2018 Apr 15
0
Adding a new conditional column to a list of dataframes
> On Apr 15, 2018, at 4:08 AM, Allaisone 1 <Allaisone1 at hotmail.com> wrote:
>
>
> Hi all ..,
>
>
> I have a list of 7000 dataframes with similar column headers and I wanted to add a new column to each dataframe based on a certain condition which is the same for all dataframes.
>
>
> When I extract one dataframe and apply my code it works very well as
2007 Mar 01
1
Generating R plots through Perl
Hello,
I am in the process of writing a Perl program to carry out and analyze
large numbers of regressions using R as the regression engine, and I am
using Statistics::R to create the communication bridge between the two
programs. Statistics::R creates a pipe between R and Perl and uses
Rterm.exe (hidden during run-time) to carry out the R commands. This
communication bridge works well for