similar to: Perpendicular symbol in plotmath?

Hi, I am trying to draw a perpendicular line from a point to two points. Mathematically I know how to do it, but to program it, I encounter some problem and hope can get help. Thanks. I have points, A, B and C. I calculate the slope and intercept for line drawn between A and B. I am trying to check whether I can draw a perpendicular line from C to line AB and get the x,y value for the point D

Dear All, I am sure this is a one-liner, but I cannot find the R command to generate the LaTex symbols \perp and \parallel. Consider for instance the figure (one can use any kind of data for the plot) pdf("friction_linear_chain_perpendicular.pdf") par( mar = c(4.5,5, 2, 1) + 0.1) plot(data[ ,1], data[

Hello Could someone please direct me to the correct commands for adding accents (grave and aigu) to a letter in a plot title, label, or in added text? I'm sure there's a handy list somewhere, but I've failed in coming up with the correct search words to find it. Thank you muchly! Jen

Tena koe Simon plot(1:10, 1:10, type='n') polygon(c(2,3,6,8), c(2,5,5,3), density=20, angle=90) polygon(c(2,3,6,8), 5+c(2,5,5,3), density=20, angle=0) I don't understand your problem. Perhaps if you "provide[d] commented, minimal, self-contained, reproducible code" it would help. HTH .... Peter Alspach -----Original Message----- From: R-help [mailto:r-help-bounces at

Thanks for the question. Here is a sample of the code for my plot: Top = c(34, 39, 42, 45, 46, 41, 41, 40, 43, 38, 33, 33) Bottom = c(24, 29, 32, 36, 32, 34, 32,41, 40, 39, 29, 24) plot(1,1, col = "white", xlim = c(1.3,11.7), ylim = c(0,80), axis = FALSE, xaxt = "n") axis(1, at = c(1:12)) polygon(c(c(1:12),c(12:1)), c(top, bottom), col =

Hello, I'd like to add labels to my plot that include a male or female symbol as subscript. I'm working in Windows Vista and R 3.0.0. I am able to add the male symbol to the plot as regular text (NOT as subscript), e.g. with: mtext("Male\u2642") This displays the word "Male" followed by the male symbol on the plot. But "\u2642" does not work when I try to

The angle is not based on the polygon edges, but it can seem that way if you do not use the asp=1 argument in your plot. Try this example, > plot(1:10, 1:10, type='n') > x <- c(1, 3, 5, 3) > y <- c(3, 5, 3, 1) > polygon(x, y, angle=0, density=10) > polygon(x, y + 4.5, angle=45, density=10) > polygon(x + 4.5, y + 4.5, angle=90, density=10) > polygon(x + 4.5, y,

I am trying to use the angle option in polygon to create polygons filled with horizontal and vertical lines. The polygons I am crating are irregular and it the angle function appears to set the angle of the shading perpendicular to the polygon sides rather than perpendicular to the axes. Is there any way to set the angle relative to the axes rather than relative to the polygon sides?

Filling polygons with lines is a throwback to the time when the height of quality graphics was the mechanical pen plotter (a device that used a pen in a mechanical arm to draw the plot on a piece of paper). Computing and printing technology has advanced quite a bit from that day, so you may want to reconsider why you want polygons filled with lines instead of just a solid color (and I consider

Hi, The following command: axis(1, at= 1:50, labels= sampleNames(data)) produces an X-axis with 50 ticks and labels drawn from the sampleNames namespace. Problem is the labels at each tick are printed parallel to the x-axis and thus run into each other. How do I specify for the labels to be printed perpendicular to the x-axis? Thanks in advance. Anjan -- =================================== anjan

This was reported to me by a colleague in China, so I may not be reproducing exactly what they are seeing (which I suspect is rw2011), but this is what I see: > version _ platform i386--netbsdelf arch i386 os netbsdelf system i386, netbsdelf status major 2 minor 1.1 year 2005 month 06 day 20 language R > help(Hershey) : : If the 'vfont' argument

Hello R users, I am new to R, so this may be a very stupid question. I need to subscript the dotted circle (Hershey escape sequence "\\SO") to a string. I tried using text(.5,.5,substitute( R[disk] == 5 R["\\SO"] ) ) but it turns out to be a syntax error. Do you have any suggestion? Thanks Gaetano

Dear R experts- I'm running R 1.2.3 (2001-04-26) on Linux. I need to get special symbols, such as a circle with a dot in it as used to indicate Solar units in astronomy, into my plot axis labels. How can I do this? Using the R documentation on the Hershey font sets, one can plot a Solar symbol within the world coordinates of a plot like this: >plot(1:10,1:10)

I would like to make my horizontal barplot vertical axis labels perpendicular to the axis. I tried las=1, srt=90; I even tried yaxt='n' thinking I'd put the labels in using mtext, but the axis continued to be drawn. Can anyone help me with this? My barplot() statement looks like this: barplot(height=foo$rebint[o1], names=foo$Unit[o1], horiz=TRUE, col=mycolors[foo$type[o1]],

Hi all, for example: > X<- rnorm(1000) > X0 <- 0.899 I want to draw a density distribution plot with a arrow pointer indicating the position of X0, meanwhile, giving out the p-value. any functions? Thanks very much.

yes I have tries, and nothing. It just shows the strings with the slashn, just like i typed it. -----Original Message----- From: Rashid Nassar [mailto:rnassar at duke.edu] Sent: ÐÝì?ôç, 16 Óå?ôåìâñßïõ 2004 15:44 To: Christos Rodopoulos Subject: Re: [R] How do I insert a newline in my title in a plot? Have you not tried what you have already suggested: title("this is a title\nIn 2

Also, I am wondering if there is any source where the expressions of many symbols are collected. Thanks you very much!!! Li, Xiang(Sean)

Hey Felix, So basically what you want is a figure containing a block of four plots, with a main title for the figure? If that's the case then something like this should work: # BEGIN CODE # par(oma=c(0,0,1,0), mfrow=c(2,2)) for(i in 1:4){ plot(NA,xlim=range(0,10),ylim=range(-5,5)) title(paste("Plot ",i,sep="")) } par(mfrow=c(1,1), oma=c(0,0,1,0)) mtext("Main

Dear R users, I need to plot to perpendicular straight lines. However, although I set the coefficients so that the lines are perpendicular, they do not look to be so in the plot. Here is a minimal working example: plot(x=c(-1, 1), y=c(-1, 1)); abline(a=0, b=1/sqrt(2)); abline(a=0, b=-1/sqrt(2)) Please tell me if the same problem is valid by you. I am running R-2.10.1 on Linux. Is there a way

I would like to label an x-axis with the nabla symbol. I have tried this with the following symbol escape sequence plot(1:5, 1:5, xlab=""); title(xlab="\\dl", vfont=c("serif symbol", "plain")) but I got the warning message parameter "vfont" couldn't be set in high-level plot() function Is it possible to use a symbol escape