Displaying 20 results from an estimated 11000 matches similar to: "graph label greek symbol failure"
2009 Jul 13
2
graph: axis label font
Hi,
excuse me for my english, i am using R on windows and i have to do several
graphs with axis labels and the axis text thicks has a specified font type,
(Arial) and a specified font size. How can i do these? Thank you in advance
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2009 Jul 14
5
Nested for loops
Hi,
I have spent some time locating a quite subtle (at least in my
opinion) bug in my code. I want two nested for loops traversing the
above-diagonal part of a square matrix. In pseudo code it would
something like
for i = 1 to 10
{
for j = i+1 to 10
{
// do something
}
}
However, trying to do the same in R, my first try was
for (i in 1:10)
{
for (j in (i+1):10)
{
//
2009 Jul 22
5
Find multiple elements in a vector
Hi,
Given a vector, say
x=sample(0:9,10)
x
[1] 0 6 3 5 1 9 7 4 8 2
I can find the location of an element by
which(x==2)
[1] 10
but what if I want to find the location of more than one number? I could do
c(which(x==2),which(x==3))
but isn't there something more streamlined? My first guess was
y=c(2,3)
which(x==y)
integer(0)
which doesn't work. I haven't found any clue in the R
2009 Jul 20
5
heatmap plot
Dear R community!
I am trying to create a heatmap based on the following data. As you can see the diagonal (0,0 to 10,10) is always 0). If I run the heatmap command like i posted it I get a graph with horizontal lines.
What is my mistake?
> heatmap(activity.matrix, Rowv = NA, Colv = NA, scale="column", xlab="x Compounds", ylab="y Compounds",
2009 Sep 30
5
Rounding error in seq(...)
Hi,
Today I was flabbergasted to see something that looks like a rounding
error in the very basic seq function in R.
> a = seq(0.1,0.9,by=0.1)
> a
[1] 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
> a[1] == 0.1
[1] TRUE
> a[2] == 0.2
[1] TRUE
> a[3] == 0.3
[1] FALSE
It turns out that the alternative
> a = (1:9)/10
works just fine. Are there any good guides out there on how to deal
2009 Jul 17
2
Re placing null values (#NULL!)
I am stumped. I have a data set with multiple columns and about 65,000 case.
Some of the cases have a "#NULL!" value so for dataframe "Props_":
access_emp pct_vacant TAVAIL park PARKACRES totlandare
4538 52.15 #NULL! 0 1 22.99 74,129.70400
4539 52.15 .09 0 1 22.99 982,850.80400
10292 54.20
2009 Oct 02
2
plot ᵒ C in graph axis label
Readers,
I have tried to use a plotmath command to add the temperature degree
sign (i.e. ? C) to the axis label of a graph:
> x<-(1:10)
> y<-(200:191)
> plot(x~y,ylab=expression(*degree~C))
Error: syntax error, unexpected '*', expecting ',' in
"plot(x~y,ylab=expression(*"
According to plotmath manual, the syntax is '*degree' and I am able to
use
2008 Sep 18
2
Writing greek letters and subscripts in graph
Dear R-users,
I would like to write Greek letters followed by subscripts in a graph (on the X-axis and in a legend). I would appreciate any help.
thank you,
delphine courvoisier
************************************
Delphine Courvoisier
Clinical Epidemiology Division
University of Geneva Hospital
+4122 37 29029
2011 Aug 25
1
Combining a greek letter and a newline on the same label
Hi,
I would like to add a two-lines label consisting of:
"Delta word1\n
word2"
(with Delta being the actual greek letter).
However, when I try "expression(paste(Delta,"word1\nword2"))", I obtain the
following display:
"word1\n
Delta word2".
Do you have any idea on how to obtain the desired display?
Thank you for your help!
Sebastien
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2009 Aug 13
2
randomForest question--problem with ntree
Hi,
I would like to use a random Forest model to get an idea about which variables from a dataset may have some prognostic significance in a smallish study. The default for the number of trees seems to be 500. I tried changing the default to ntree=2000 or ntree=200 and the results appear identical. Have changed mtry from mtry=5 to mtry=6 successfully. Have seen same problem on both a Windows
2009 Aug 16
5
Plot(x,y)
Hi ,
I am using the plot function for some data , and the plot is coming back
pure black , with scales on the side .
Regards
Malcolm
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2009 Jul 16
4
loading a file in R in mac OS X
Hello,
Please forgive me that this question is so basic, but i have not been able
to find a solution in any of the basic R introductions, in the R wiki, or in
the stats textbook i'm using to learn R. I run R on a macintosh, and i have
not been able to load any data files yet. For instance, if I have a data
table in a file called schools.txt on my desktop, i've been trying to load
the
2006 Apr 21
1
R graph strip in Greek Letters
Hi all,
I have one question on xyplot() function.
I am trying to produce a graph by this code.
tmp <- data.frame(a=rnorm(20),
b=rnorm(20),
rho=factor(rep(1:2, c(10,10))),
k=factor(rep(1:5,4)))
tmp.lattice <-
xyplot(a ~ b | rho*k, data=tmp,
par.strip.text=list(font=5),
strip=function(...) strip.default(...,
2009 Jul 16
5
Transformation of data!
Hi Colleagues,
Could you please help?
I get as the output of my calculations following
[1] 0.000000e+00 1.890000e-04 3.933000e-05 1.701501e-04 2.040456e-04
[6] 3.119242e-04 2.545665e-04 1.893930e-03 1.303112e-03 9.880183e-04
[11] 1.504378e-03 1.549246e-03 5.877690e-04 4.771359e-04 8.528219e-04
How is it possible to transform the data to get a vector as following
10
2009 Jul 18
1
Building a big.matrix using foreach
Hi there!
I have become a big fan of the 'foreach' package allowing me to do a
lot of stuff in parallel. For example, evaluating the function f on
all elements in a vector x is easily accomplished:
foreach(i=1:length(x),.combine=c) %dopar% f(x[i])
Here the .combine=c option tells foreach to combine output using the
c()-function. That is, to return it as a vector.
Today I discovered the
2009 Sep 11
4
R on Multi Core
Hi,
Our discussions about 64 bit R has led me to another thought.
I have a nice dual core 3.0 chip inside my Linux Box (Running Fedora 11.)
Is there a version of R that would take advantage of BOTH cores??
(Watching my system performance meter now is interesting, Running R will
hold a single core at 100% perfectly, but the other core sites idle.)
Thanks!
--
Noah
2010 Oct 04
2
plotmath: how to use greek symbols in expression(integral(f(tau)*dtau, 0, t))?
I would like to use greek "tau" as a symbol of variable to integrate
over in plotmath
expression(integral(f(tau)*dtau, 0,t))
but nothing seems to work. I tried d{\tau}, d\tau, etc.,
without any success
Is it possible? How can I accomplish this?
Best regards,
Ryszard
--------------------------------------------------------------------------
Confidentiality Notice: This message is
2010 Mar 23
1
Bold greek letters using plotmath
I'm trying to annotate some graphics using plotmath and finding out that the
code I'm using isn't bolding the greek letters - it bolds the rest (once I
adjusted the numerics to characters), it's just failing on the greek
characters.
Any suggestions welcomed.
Jim Price.
Cardiome Pharma Corp.
Test code:
plot(1:5, type = 'n')
# The not bold version
text(2, 2:4, cex =
2024 Mar 11
1
evince not showing "greek" and "math" in *.pdf plots
This problem has bugged me for several years now,
and our own IT staff has tried a few things, but then never
cared enough to persist fixing it.
It *is* a bug in evince, the standard pdf viewer on Fedora and
IIUC also quite few other Linux distributions, and
*not* a bug in R; hence I am asking for help/hints here.
A very simple example:
2003 Sep 12
2
Getting greek letters in plot labels and title
Hi,
Does any one knows how to include greek letters in plot labels and plot
titles ?
Thanks a lot
paul
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