Displaying 20 results from an estimated 30000 matches similar to: "Using plotmath expressions in lattice key text"
2008 Apr 02
1
Trouble combining plotmath, bquote, expressions
I'm using R-2.6.2 on Fedora Linux 9.
I've been experimenting with plotmath.
I wish it were easier to combine expressions in plotmath with values
from the R program itself. There are two parameters in the following
example, the mean "mymean" and standard deviation "mystd". I am able
to use bquote to write elements into the graph title like
mu = mymean
and R will
2005 Aug 14
1
complex expression with plotmath
Hello everyone,
I want to define a function that receives the name of two variables
(may include Greek letters and subscripts) and uses them into the
title of a plot.
My best attempt is the following:
myplot <- function(var1, var2) {
v=paste(var1,"==1 & ",var2,"==2");
plot(1:10, main=parse(,,v))
}
But when I call it with something like myplot("Q[i]",
2009 Jun 03
1
Would like to add this to example for plotmath. Can you help?
Greetings:
I would like comments on this example and after fixing it up, I need
help from someone who has access to insert this in R's help page for
plotmath.
I uploaded a drawing
http://pj.freefaculty.org/R/Normal-2009.pdf
that is created by the following code
http://pj.freefaculty.org/R/Normal1_2009_plotmathExample.R
This will be a good addition to the plotmath help page/example.
2008 Jun 25
0
Use plotmath expressions read from a text file in mtext/bquote
Hello R-help List
I am writing some R scripts to create graphs of water quality trends
that will be called by a web service running R. The axis titles will
need to change as the input data (ie. water quality variable) changes
according to a user's choice made via a web page. The way I am
currently passing call-specific parameters to the R script is via a text
file created on the fly by the
2010 Jul 06
1
plotmath vector problem; full program enclosed
Here's another example of my plotmath whipping boy, the Normal distribution.
A colleague asks for a Normal plotted above a series of axes that
represent various other distributions (T, etc).
I want to use vectors of equations in plotmath to do this, but have
run into trouble. Now I've isolated the problem down to a relatively
small piece of working example code (below). If you would
2010 Jan 25
2
Two == expressions in bquote
Hi,
I want to put text on a plot containing something like: a = b^2 = <squared numeric value of b> using bquote.
Example:
mu = 5
plot(1:10,1:10)
text(2,8, bquote(delta == mu^2)) # This works
text(2.5,8, bquote(phantom(0) == .(mu^2))) # but is unpredictable
text(2,8, bquote(delta == mu^2 == .(mu^2))) # This doesn't work
The last text function returns the error:
2009 Sep 02
2
combining grid.text, expression and variables
Dear R-users,
I am trying to use the grid.text and expression functions to display
several character strings and plotmath text on a viewport. Some strings
can include a variable portion (PI.limits in the following example),
which I thought could be implemented by combining the bquote and the
expression functions. Unfortunately, my expressions do not seem to be
evaluated. I would greatly
2008 Apr 08
2
plotmath "overstrikes" in output on a Linux system
I've been testing plotmath. But I'm getting some funny output one one
computer. The problem is that characters are 'jumbled' and overstrike
when symbols are introduced.
Sample code:
mu <- 440.0
sigma <- 12.5
myx <- seq( mu - 4*sigma, mu+ 4*sigma, length.out=500)
myDensity <- dnorm(myx,mean=mu,sd=sigma)
# Here's one way to retrieve the values of mu and sigma and
2023 Jun 08
2
need help with plotmath and/or plotting unicode characters
R 4.2.3
OS X
Colleagues
This should be easy -- but not for me.
I want to plot text similar to this:
N ? XX: YY
where XX can be either 1 or 50 and YY is an integer
I envision that there would be two solutions:
UNICODE: If I can generate "?" via unicode, the problem is solved:
mtext(side=3, paste0("N ", UNICODE, " ", XX, ": ", YY))
PLOTMATH:
2009 Jan 27
1
Plotmath and line breaks in long annotations for plots
I'm trying to combine multi-line text and math annotations on a plot
and am not having much luck. I looked at various suggestions in the
archives, but I cannot coerce any of them to do what I want. I'm
beginning (finally?!) to think that there is an entirely better
approach than the one I have tried.
The essential problem is that line breaks (\n) don't seem to behave
the way I
2012 Mar 16
2
variable values in plotmath expressions
## I would like help in using variable values in plotmath expressions
## in lattice
x <- 1:10
y <- 1:10
pval <- .95
plot(y ~ x, ## works as I want in base graphics
main=substitute(list(alpha * " = " * group("",list(p),"")),
list(p=pval)))
plot(y ~ x, ## doesn't work as intended: "pval" is displayed
main=substitute(list(alpha *
2011 Jun 02
2
lattice + plotmath: how to get a variable in bold face?
Dear all,
How can I get a bold "1000" in the title? I would like to use a variable (as opposed to putting in "1000" directly).
library(lattice)
N <- 1000
xyplot(0~0, xlab.top=list(label=as.expression(bquote(bold("foo" ~ .(N) ~ "bar"))), font=2, cex=1.2))
## => "font=2" is ignored (of course)
Cheers,
Marius
2010 Aug 27
3
How to plot an expression-label with variable text
Disclaimer: I have read plotmath, but maybe it's too late today:
How do I get the two labels to be the same:
plot.new()
lab =expression(paste("Estimated ", t[50]," from tgv"))
text(0.5,0.5,lab)
# Should look the same as above. I could not get the substitute right:
what = "tgv"
lab =expression(paste("Estimated ", t[50]," from ",what))
2010 Aug 01
3
Constructing arguments for plotmath
Colleagues,
I am encountering difficulty adding formatted text to a graphic. Specifically, I want to add a superscript in the middle of a text string but I would like to format the text string on the fly. The commands:
plot(1,1)
ARG <- bquote('TEXT'^'\u00ae')
mtext(ARG, line=-2, side=1)
yield the desired output.
However, my goal is to paste together a string, then pass
2008 Dec 31
3
Plotmath with values?
I hope to use the plotmath facility to print titles that mix
math and values of R variables.
The help for "plotmath" has an example, which after repeated
reading, I find baffling. Likewise, I have read the help file
for "substitute" (wqhich seems to be needed) without ever
understanding what it does, other than being used in some magic
incantations.
I would like to do
2004 Apr 14
1
ltext, plotmath, and substitute
I am interested to use plotmath functions within a panel function but am having
some problems getting the code right. Within each panel I am plotting the data,
fitting a regression line, and would like to print the regression equation.
Here is a trivial example of what I'd like to do:
# generate simple data
tmp.df <- data.frame(id = rep(1:4, each=4),
time = rep(1:4, 4),
das =
2011 Jun 02
2
plotmath: paste string and expression [from a vector of expressions]
Dear all,
I have a vector of expressions and would like to "paste" some string to it before using it in a plot:
vars <- vector("expression", 2)
vars[1] <- expression(alpha)
vars[2] <- expression(beta)
plot(0, 0, main=substitute(bold("Foo" ~~ VAR), list(VAR=vars[2]) ))
Although I tried hard, I just can't figure out how to solve this. The title should be
2012 Nov 14
2
vectorized plotmath expressions via substitute()
hi all - i've seen versions of this question before, but none seem to get
directly at my solving my (probably very simple) issue:
i simply want to annotate the tick marks on an axis with (superscripted)
10^x notation, and tried this:
axis(1, at = axTicks(1), as.expression(substitute(10^foo, list(foo =
axTicks(1))))
thinking the as.expression/substitute would create the appropriate
2012 Oct 05
1
Format of numbers in plotmath expressions.
I want to do something like:
TH <- sprintf("%1.1f",c(0.3,0.5,0.7,0.9,1))
plot(1:10)
legend("bottomright",pch=1:5,legend=parse(text=paste("theta ==",TH)))
Notice that the final "1" comes out in the legend as just plain "1" and NOT
as "1.0" although TH is
[1] "0.3" "0.5" "0.7" "0.9"
2009 Oct 19
1
How do I wrap a long mixed text/math expression in an axis label?
I would like to wrap a y-axis label onto two lines. My label is an expression
containing both text and math symbols. I have looked at plotmath,
strsplit(), strwrap(), deparse(), do.call(), substitute() and bquote().
Based on previous posts, I can get plain text to wrap. However, when I try
these methods on my label, the exact string is returned, rather than
evaluating the math symbols.
My