Displaying 10 results from an estimated 10 matches for "rx4".
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2007 Jun 05
3
read table
Hi,
I'm a novice of R.
I want to read the following table into R:
names mpg cyl disp hp drat
Mazda RX4 21.0 6 160.0 110 3.90
Mazda RX4 Wag 21.0 6 160.0 110 3.90
The command I used is:
> test <- read.table(file.choose(),header=T)
The result is:
Error in read.table(file.choose(), header = T) :
more columns than column names
Can anybody tells me what is wro...
2013 Apr 12
3
Why copying columns of a data.frame becomes numeric?
...rather than data frame.
But, when I copy rows, they data frame retains its class. Why is this? I
don't see why copying rows vs columns is so different.
> class(mtcars)
[1] "data.frame"
> head(mtcars)
mpg cyl disp hp drat wt qsec vs am gear carb
Mazda RX4 21.0 6 160 110 3.90 2.620 16.46 0 1 4 4
Mazda RX4 Wag 21.0 6 160 110 3.90 2.875 17.02 0 1 4 4
Datsun 710 22.8 4 108 93 3.85 2.320 18.61 1 1 4 1
Hornet 4 Drive 21.4 6 258 110 3.08 3.215 19.44 1 0 3 1
Hornet Sportabout 18.7 8 360 1...
2017 Jun 01
3
odfWeave - A loop of the "same" data
...s another way - can I check if anyone has a way of looping through data in odfWeave (or possibly sweave) to do a repeating analysis on subsets of data?
For simplicity lets use mtcars dataset in R to explain. Dataset looks like this:
> mtcars
mpg cyl disp hp drat wt ...
Mazda RX4 21.0 6 160 110 3.90 2.62 ...
Mazda RX4 Wag 21.0 6 160 110 3.90 2.88 ...
Datsun 710 22.8 4 108 93 3.85 2.32 ...
............
Say I wanted to have a 'catalogue' style report from mtcars, where on each page I would perhaps have the Rowname as a heading and then...
2017 Jun 01
0
odfWeave - A loop of the "same" data
...has a way of
> looping through data in odfWeave (or possibly sweave) to do a repeating
> analysis on subsets of data?
>
> For simplicity lets use mtcars dataset in R to explain. Dataset looks like this:
>
>> mtcars
> mpg cyl disp hp drat wt ...
> Mazda RX4 21.0 6 160 110 3.90 2.62 ...
> Mazda RX4 Wag 21.0 6 160 110 3.90 2.88 ...
> Datsun 710 22.8 4 108 93 3.85 2.32 ...
> ............
>
> Say I wanted to have a 'catalogue' style report from mtcars, where on
> each page I would perhaps have the...
2007 Feb 13
1
Questions about results from PCAproj for robust principal component analysis
...irst four
eigenvectors of
the (robust) covariance matrix are orthonormal:
sum(dmpcaprj$loadings[,i]*dmpcaprj$loadings[,j]) = 1 if i == j, ~ 0 if i
!= j
- dmpcaprj$sdev contains the square roots of the four corresponding
eigenvalues.
- dmpcaprj$n.obs equals R.
- dmpcaprj$scores has dimensions Rx4, as it should.
HOWEVER, the columns of dmpcaprj$scores are neither de-meaned nor
orthogonal. So,
apply(dmpcaprj$scores,2,mean) is a non-zero vector, and
sum(dmpcaprj$scores[,i]*dmpcaprj$scores[,j]) != 0 if i != j, > 0 if i == j
ALSO,
- dmpcaprj$scale is in this case a vector of all 1'...
2003 Aug 07
1
graph for selected lines in stars()
...listers,
The following command (derived from the example in the ?stars help page)
works :
data(mtcars)
stars(mtcars[, 1:7])
But the following gives an error:
stars(mtcars[1, 1:7])
Error in s.y[i, ] : incorrect number of dimensions
I was expecting to have the star graph for the first line (Mazda Rx4)
The following give an incorrect graph for the first two cars :
stars(mtcars[1:2, 1:7])
The following gives the correct graphs for all cars:
stars(mtcars[1:32, 1:7])
How can I have correct graphs for a selection of lines ?
I am using R 1.7.1 on linux Mandrake 9.1
Thank you for your help
Tito...
2013 Apr 16
2
efficiently diff two data frames
...rence: 14.23546"
I could use all.equal(), but it only returns human readable info that
cannot be easily used programmatically. It also gives no info on the
rows. Another way would be to:
require(prob)
> setdiff(Xe, Xf)
mpg cyl disp hp drat wt qsec vs am gear carb
Mazda RX4 Wag 21.0 6 160 110 3.90 2.875 17.02 0 1 4 4
Datsun 710 22.8 4 108 93 3.85 2.320 18.61 1 1 4 1
Hornet 4 Drive 21.4 6 258 110 3.08 3.215 19.44 1 0 3 1
But again this doesn't return subsetting indices, nor any info on hte
columns. Any suggestions on how to a...
2018 May 10
4
the first name of the first column
Dear all;
I need to run heatmap. Because my first column in my data is alphanumeric,
I can not run as.matrix(scale(my_data)). So I need to make my data readable
as in data(mtcars). In *mtcars *data the first column is alphanumeric and
has no name.
Thanks,
Greg
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2009 Apr 27
0
VIF's in R using BIGLM
...ression output of BIGLM. Traditionally, this has
been possible with the regular lm() function. Follows a quick
illustration (the model below is pretty silly, only for illustration
purposes).
Example dataset:
> mtcars
mpg cyl disp hp drat wt qsec vs am gear
carb
Mazda RX4 21.0 6 160.0 110 3.90 2.620 16.46 0 1 4
4
Mazda RX4 Wag 21.0 6 160.0 110 3.90 2.875 17.02 0 1 4
4
Datsun 710 22.8 4 108.0 93 3.85 2.320 18.61 1 1 4
1
Hornet 4 Drive 21.4 6 258.0 110 3.08 3.215 19.44 1 0 3
1
Hornet Sportabout 18.7 8 360....
2008 Jun 30
4
Rebuild of kernel 2.6.9-67.0.20.EL failure
Hello list.
I'm trying to rebuild the 2.6.9.67.0.20.EL kernel, but it fails even without
modifications.
How did I try it?
Created a (non-root) build environment (not a mock )
Installed the kernel.scr.rpm and did a
rpmbuild -ba --target=`uname -m` kernel-2.6.spec 2> prep-err.log | tee
prep-out.log
The build failed at the end:
Processing files: kernel-xenU-devel-2.6.9-67.0.20.EL
Checking