Displaying 20 results from an estimated 5000 matches similar to: "Hmisc::rcorr on a 'data.frame'?"
2011 Aug 19
2
display only the top-right half of a correlation matrix?
Dear all
Is there an easy way to display only one half (top-right or
bottom-left) of a correlation matrix?
> require(Hmisc)
> rcorr(as.matrix(mtcars[ , 1:4]))
mpg cyl disp hp
mpg 1.00 -0.85 -0.85 -0.78
cyl -0.85 1.00 0.90 0.83
disp -0.85 0.90 1.00 0.79
hp -0.78 0.83 0.79 1.00
n= 32
P
mpg cyl disp hp
mpg 0 0 0
cyl 0 0 0
disp 0 0
2010 Nov 30
3
pca analysis: extract rotated scores?
Dear all
I'm unable to find an example of extracting the rotated scores of a
principal components analysis. I can do this easily for the un-rotated
version.
data(mtcars)
.PC <- princomp(~am+carb+cyl+disp+drat+gear+hp+mpg, cor=TRUE, data=mtcars)
unclass(loadings(.PC)) # component loadings
summary(.PC) # proportions of variance
mtcars$PC1 <- .PC$scores[,1] # extract un-rotated scores of
2011 Mar 01
1
which does the "S.D." returned by {Hmisc} rcorr.cens measure?
Dear R-help,
This is an example in the {Hmisc} manual under rcorr.cens function:
> set.seed(1)
> x <- round(rnorm(200))
> y <- rnorm(200)
> round(rcorr.cens(x, y, outx=F),4)
C Index Dxy S.D. n missing
uncensored Relevant Pairs Concordant Uncertain
0.4831 -0.0338 0.0462 200.0000
2002 Sep 05
1
rcorr in Hmisc
Dear list,
I get the following message when I use rcorr in library "Hmisc"
------------------------------------------------------
> rcorr(lskPox0t30, type=c("spearman"))
Error in "[<-.data.frame"(*tmp*, is.na(x), value = 1e+30) :
matrix subscripts not allowed in replacement
------------------------------------------------------
I do not understand
2011 May 22
1
How to calculate confidence interval of C statistic by rcorr.cens
Hi,
I'm trying to calculate 95% confidence interval of C statistic of
logistic regression model using rcorr.cens in rms package. I wrote a
brief function for this purpose as the followings;
CstatisticCI <- function(x) # x is object of rcorr.cens.
{
se <- x["S.D."]/sqrt(x["n"])
Low95 <- x["C Index"] - 1.96*se
Upper95 <- x["C
2012 Sep 12
1
digit precision in p value of rcorr
Hi all,
Sorry about posting a really novice question.
I was able to run rcorr after converting the list to a matrix by your help.
I'm though wondering if there is any way to find out an exact p value as
the output only gave me 0 for P value as shown below.
I've added options(digits=10), which doesn't seem to help at all. Any help
would be appreciated.
P
D Prime T
2008 Nov 11
1
how to export results of rcorr into excel
Hi,
I try to export the outputs of rcorr into excel. but I got error message,"cannot coerce class "rcorr" into a data.frame". Actually i just need export part of results of this analysis,e.g. p-values or stat-values.
Does anyone have sort of exprience before or you can help on how to export subset of results of analysis?
Many Thanks!
Xin
2009 Mar 09
1
rcorr.cens Goodman-Kruskal gamma
Dear r-helpers!
I want to classify my vegetation data with hierachical cluster analysis.
My Dataset consist of Abundance-Values (Braun-Blanquet ordinal scale; ranked) for each plant species and relev?.
I found a lot of r-packages dealing with cluster analysis, but none of them is able to calculate a distance measure for ranked data.
Podani recommends the use of Goodman and Kruskals' Gamma for
2008 Jul 31
0
Sperman Correlation with rcorr (Hmisc)
Hello R-User!
I have a data.frame with 82 variables (columns) and 290 rows.
The variables are set to classes factor, ordered factor and numeric.
I used the following code
Matrix.My.data<-as.matrix(Df.My.Data[2:82])
Matrix.My.data.rcorr<-rcorr(Matrix.My.data, type="spearman")
and got the following message:
Fehler in storage.mode(x) <- if (.R.) "double" else
2009 Oct 02
1
trouble with html() in Hmisc
Dear all
On my system html() conversion of a `latex()' object fails. Follows a
dummy example:
> require(Hmisc)
> data(Angell)
> .object <- cor(Angell[,1:2], use="complete.obs")
> tmp <- latex(.object, cdec=c(2,2), title="")
> class(tmp)
[1] "latex"
> html(tmp)
/tmp/RtmprfPwzw/file7e72f7a7.tex:9: Warning: Command not found: \tabularnewline
2017 Sep 21
0
rcorr error in R stat
Hello,
Also, the other file, NPA.csv, is not in tabular form. Can you please
reformat it?
Rui Barradas
Citando ruipbarradas at sapo.pt:
> Hello,
>
> Please keep this on the list, always cc r-help.
> One of the files in your attachment is empty:
>
> y <- read.csv(file.choose("GT.csv"))
> Error in read.table(file = file, header = header, sep = sep, quote =
2017 Sep 21
2
rcorr error in R stat
Hello,
Please keep this on the list, always cc r-help.
One of the files in your attachment is empty:
y <- read.csv(file.choose("GT.csv"))
Error in read.table(file = file, header = header, sep = sep, quote = quote,? :
? no lines available in input
Rui Barradas
?
Citando Chaitanya Ganne <Chaitanya.Ganne at jefferson.edu>:
> Thank you so much for your input.
>
> I am
2009 Aug 16
2
bootstrapped correlation confint lower than -1 ?
Dear R users,
Does the results below make any sense? Can the the interval of the
correlation coefficient be between *-1.0185* and -0.8265 at 95%
confidence level?
Liviu
> library(boot)
> data(mtcars)
> with(mtcars, cor.test(mpg, wt, met="spearman"))
Spearman's rank correlation rho
data: mpg and wt
S = 10292, p-value = 1.488e-11
alternative hypothesis: true rho is not
2013 Apr 17
2
remove higher order interaction terms
Dear all,
Consider the model below:
> x <- lm(mpg ~ cyl * disp * hp * drat, mtcars)
> summary(x)
Call:
lm(formula = mpg ~ cyl * disp * hp * drat, data = mtcars)
Residuals:
Min 1Q Median 3Q Max
-3.5725 -0.6603 0.0108 1.1017 2.6956
Coefficients:
Estimate Std. Error t value Pr(>|t|)
(Intercept) 1.070e+03 3.856e+02 2.776 0.01350 *
cyl
2010 May 05
1
rcorr p-values for pearson's correlation coefficients
Hi! All,
To find co-expressed genes from a expression matrix of dimension (9275
X 569), I used rcorr function from library(Hmisc) to calculate pearson
correlation coefficient (PCC) and their corresponding p-values. From
the correlation matrix (9275 X 9275) and pvalue matrix (9275 X 9275)
obtained using rcorr function, I wanted to select those pairs whose
PCC's are above 0.8 cut-off and then
2007 Oct 01
4
how to plot a graph with different pch
I am trying to plot a graph but the points on the graph should be
different symbols and colors. It should represent what is in the legend.
I tried using the points command but this does not work. Is there
another command in R that would allow me to use different symbols and
colors for the points?
Thank you kindly.
data(mtcars)
plot(mtcars$wt,mtcars$mpg,xlab= "Weight(lbs/1000)",
2007 Dec 19
1
using rcorr.cens for Goodman Kruskal gamma
Dear List,
I would like to calculate the Goodman-Kruskal gamma for the predicted
classes obtained from an ordinal regression model using lrm in the Design
package. I couldn't find a way to get gamma for predicted values in Design
so have found previous positings suggesting to use :
Rcorr.cens(x, S outx = TRUE) in the Hmisc package
My question is, will this work for predicted vs
2010 Aug 04
3
retrieve name of an object?
Dear all
Is there an easier way to retrieve the name of an object? For example,
> tmp <- 1:10
> as.character(quote(tmp))
[1] "tmp"
> as.character(quote(mtcars$cyl))
[1] "$" "mtcars" "cyl"
> as.character(quote(mtcars$cyl))[3]
[1] "cyl"
The last call more than anything seems a hack. Is there a better way?
Thank you
Liviu
2012 Mar 15
2
Ggplot barchart drops factor levels: how to show them with zero counts?
Hello,
When plotting a barchart with ggplot it drops the levels of the factor for
which no counts are available.
For example:
library(ggplot)
mtcars$cyl<-factor(mtcars$cyl)
ggplot(mtcars[!mtcars$cyl==4,], aes(cyl))+geom_bar()
levels(mtcars[!mtcars$cyl==4,])
This shows my problem. Because no counts are available for factorlevel '4',
the label 4 dissapears from the plot. However, I
2004 Jun 04
1
use of "rcorr.cens" with binary response?
Dear R-helpers,
I recently switched from SAS to R, in order to model the occurrence of
rare events through logistic regression.
Is there a package available in R to calculate the Goodman-Kruskal
Gamma?
After searching a bit I found a function "rcorr.cens" which should do
the job, but it is not clear to me how to define the input vectors? Is
"x" a vector with the fitted