Displaying 20 results from an estimated 20000 matches similar to: "question about rev"
2005 May 30
3
how to "singlify" entries
hi netters
I have a rather simple question. I have a data frame with two variables X
and Y, both of which are factors. X has 100 levels while Y has 10 levels
only. The data frame has 100 rows in all, so for X the values are unique,
and Y has many replicate values. Now I wanna reduce the data frame into 10
rows only, according to the 10 levels of Y. I don't care which value of X
is in
2007 Apr 24
2
(no subject)
I wanna display some data which there are subsets of a dataframe called "don" but there are errors like this
> L=as.numeric(levels(factor(don$Id_Cara)))
> for(i in L){
+ donC(i)=subset(don, Id_Cara == i, select = c( Id_TrT1, Id_Geno, Id_Rep, Val_O))
+ donC(i)
+ }
Erreur dans donC(i) = subset(don, Id_Cara == i, select = c(Id_TrT1, Id_Geno, :
impossible de trouver la
2003 Jul 16
1
bwplot does something weird with Hmisc library attached
Dear all
I would like to ask you about possible bug in using bwplot (from lattice) together
with Hmisc library attached. I found it in my actual data, but here is a toy
example. It appears only when some levels are missing.
library(lattice)
library(Hmisc)
# preparing data
x1<-rnorm(10,5,1)
x2<-rnorm(10,5,5)
x3<-rnorm(10,1,1)
x4<-rnorm(10,1,5)
x<-c(x1,x2,x3,x4)
x<-c(x,x+5)
2005 May 24
3
Reversing axis in a log plot (PR#7894)
Full_Name: Christian Marquardt
Version: 2.1.0
OS: Linux (Redhat 9)
Submission from: (NULL) (151.170.240.10)
Following the advice of a reader of R-help, I would now like to submit this as a
bug report:
Say we have
x = seq(1,3, by = 0.01)
y = exp(x)
Plotting and reversing linear axis is fine
plot(x,y)
plot(x,y, ylim = c(30,1))
as is a usual log-plot:
plot(x,y, log =
2011 Aug 18
3
How to get the descriptive statistic of the whole dataframe?
Hi all:
If I have a dataframe of N columns.If I wanna get the min(or max,or
mean...etc)of the whole dataframe,how to do it quickly?
What I can do is only:
min(data[,1:ncol(data)])
Any other suggestion?
Thanks!
best
[[alternative HTML version deleted]]
2009 Aug 19
5
scale or not to scale that is the question - prcomp
Dear all
here is my data called "rglp"
structure(list(vzorek = structure(1:17, .Label = c("179/1/1",
"179/2/1", "180/1", "181/1", "182/1", "183/1", "184/1", "185/1",
"186/1", "187/1", "188/1", "189/1", "190/1", "191/1", "192/1",
2018 Feb 12
2
plotting the regression coefficients
Hi Petr and Richard;
Thanks for your responses and supports. I just faced a different problem.
I have the following R codes and work well.
p <- ggplot(a, aes(x=Phenotypes, y=Metabolites, size=abs(Beta),
colour=factor(sign(Beta)))) +
theme(axis.text=element_text(size = 5))
p1<-p+geom_point()
p2<-p1+theme(panel.grid.major = element_blank(),
panel.grid.minor = element_blank(),
2018 Feb 12
3
plotting the regression coefficients
Hi
After melt you can change levels of your factor variable. Again with the toy example.
> levels(temp$variable)
[1] "y1" "y2" "y3" "y4"
> levels(temp$variable) <- levels(temp$variable)[c(2,4,1,3)]
> levels(temp$variable)
[1] "y2" "y4" "y1" "y3"
>
And you will get graphs with this new levels ordering.
2018 Feb 12
0
plotting the regression coefficients
Petr, there was a thinko in your response.
tmp <- data.frame(m=factor(letters[1:4]), n=1:4)
tmp
tmp$m <- factor(tmp$m, levels=c("c","b","a","d")) ## right
tmp[order(tmp$m),]
tmp <- data.frame(m=factor(letters[1:4]), n=1:4)
levels(tmp$m) <- c("c","b","a","d") ## wrong
tmp[order(tmp$m),]
changing levels
2008 Jan 10
6
4 dimensional graphics
Dear all
I want to display 4 dimensional space by some suitable way. I searched
CRAN and found miscellaneous 3 dim graphics packages which I maybe can
modify but anyway I am open to any hint how to efficiently display data
like:
longitude, latitude, height, value
Thank you
Petr Pikal
petr.pikal at precheza.cz
2018 Feb 13
0
plotting the regression coefficients
Hi
scale_colour_gradient(?red?, ?blue?)
should do the trick.
Actually I found it by Google
ggplot colour
http://www.cookbook-r.com/Graphs/Colors_(ggplot2)/
http://www.sthda.com/english/wiki/ggplot2-colors-how-to-change-colors-automatically-and-manually#gradient-colors-for-scatter-plots
question. So you could find it too and probably far more quickly then myself as I have also other duties.
Cheers
2003 May 20
3
plot POSIX class and identify
Hallo all
just a small question I did not find an answer in help pages.
Is it possible to use identify() after plotting with plot.POSIX to
label points and/or to find out some points?
Thanks a lot.
Best regards
Petr Pikal
petr.pikal at precheza.cz
p.pik at volny.cz
2007 Jan 05
4
Fast Removing Duplicates from Every Column
Hi,
I'm looking for some lines of code that does the following:
I have a dataframe with 160 Columns and a number of rows (max 30):
Col1 Col2 Col3 ... Col 159 Col 160
Row 1 0 0 LD ... 0 VD
Row 2 HD 0 0 0 MD
Row 3 0 HD HD 0 LD
Row 4 LD HD HD 0 LD
... ...
LastRow HD HD LD 0 MD
Now I want a dataframe that looks like this. As you see
2005 Nov 28
2
str and structable error
Hallo
I encountered a behaviour which puzzles me (but
finally I did get what I wanted).
I used structable and strucplot but I wanted to change
names of variables in structable object. I tried to subset
it, use names but to no avail. So I tried str and
expected to get a structure of an object but:
> sss<-structable(Titanic)
> str(sss)
Error in "[.structable"(x, args[[1]],
2020 Oct 23
2
How to shade area between lines in ggplot2
Thank you, but this split the area into two and distorts the shape of
the plot. (compared to
```
p + geom_abline(slope = slope_1, intercept = intercept_1 - 1/w[2],
linetype = "dashed", col = "royalblue") +
geom_abline(slope = slope_1, intercept = intercept_1 + 1/w[2],
linetype = "dashed", col = "royalblue")
```
Why there
2004 Jun 09
5
"attach" in R corr. to Spus one
Hi,
I am a newbie to R, just trying to switch from
Splus. I am wondering to know if there is any such
command in R as "attach" in Splus which can be used to
attach the full directory.
Also, any idea/referrence about, how to load c
functions in R would be highly appreciated.
Thanks,
Utsav
2002 Jan 24
5
aggregate, by tapply
Dear R users
I searched some sources but i did not find an answer.Please give
me some hint to following problem.
I would like to compute a summary statistic for some vector for
different factor levels. I know I can use tapply or aggregate but I
do not know if there is a way how to use function with several
(two) variable input (like weighted.mean).
I wrote a simple a function for factor
2006 Aug 24
2
my error with augPred
Dear all
I try to refine my nlme models and with partial success. The model is
refined and fitted (using Pinheiro/Bates book as a tutorial) but when
I try to plot
plot(augPred(fit4))
I obtain
Error in predict.nlme(object, value[1:(nrow(value)/nL), , drop =
FALSE], :
Levels (0,3.5],(3.5,5],(5,7],(7,Inf] not allowed for
vykon.fac
>
Is it due to the fact that I have unbalanced
2003 Nov 14
2
bad performance of a function
Dear all
I need to find a length of true sequences in logical vector (see example 1). I found
a possible solution which is good but if I use it on a larger data set I experience a
substantial decrease in performance (example 2).
Example 1
set.seed(111)
x <- sample(c(T,F),50, replace=T)
system.time(cetnost <- as.numeric(table(which(x)-cumsum(x[which(x)]))))
[1] 0.00 0.00 0.03 NA NA
2005 Feb 09
2
[Fwd: Re: Fw: Contour plot]
Petr,
It works perfectly! But I still have a question;
I have fit the following data;
x,y,z
1,10,11
2,11,15
3,12,21
4,13,29
5,14,39
6,15,51
7,16,65
8,17,81
9,18,99
10,19,119
>dat.lm <- lm(z~I(x^2)+y, data=dat)
>dat.lm
Call:
lm(formula = z ~ I(x^2) + y, data = dat)
Coefficients:
(Intercept) I(x^2) y
1.841e-14 1.000e+00 1.000e+00
How do I create the