similar to: Newbie question: Linear regression with error bars.

Hi, I'm sorry to send email to everyone on this list, but I have a simple question which is bothering me and I can't seem to figure out the correct answer. I just downloaded R and I'm trying to reproduce some simple analysis I've done on other packages. In particular, if I have a vector of experimental values and a vector of their uncertainties, is there a way to plot the

I've thrown a couple of useful functions into a new package "gregmisc" and uploaded them to ftp://ftp.ci.tuwien.ac.at/incoming/gregmisc_0.1.1.tgz Here's DESCRIPTION: Package: gregmisc Description: Misc Functions written/maintained by Gregory R. Warnes Title: Greg's Miscellaneous Functions Version: 0.1 Date: 2001/05/24 Depends: R Maintainer: Gregory R. Warnes

Dear R Experts, Is there a way in R to add an error bar (say in the y direction) for each data point? Thanks Ming Chow -- __________________________________________________________________ -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help",

Dear R Experts, Is there a way in R to add an error bar (say in the y direction) for each data point? Thanks Ming Chow -- __________________________________________________________________ -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help",

I'm a newcomer to R. I can't seem to find any documentation how to add error bars to points in scatter plots. I guess I could plot the points, then compute and plot line segments in the X and/or Y directions to represent the errors? - Mike -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read

I'm new to R (and to S) and am wondering about code from pages 72 and 83 of MASS (Venables+Ripley, 3rd edition), to draw an envelope on a QQ plot. Copying from the book, I've got: #... code whose gist is "a.fit <- nls(..." num.points <- length(resid(a.fit)) qqnorm(residuals(a.fit)) # illustrate data-model residuals qqline(residuals(a.fit)) samp <-

Full_Name: Volker Franz Version: 2.0.1 (2004-11-15) OS: Mac OSX / Debian Submission from: (NULL) (84.58.8.232) Hi there, the new version of plotCI (Version: 2.0.3 of gplots) produces errors if the upper or lower error bars should be omitted by passing NULL as an argument. Older versions of plotCI had no problem with this. Here is an example: library(gplots) means <- c(1,2,3,4,5) upperw

I' ve seen that several people are looking for a function that creates a barplot with an error indicators (I was one of them myself). Maybe you will find the following code helpful (There are some examples how to use it at the end): # Creates a barplot. #bar.plot() needs a datavector for the height of bars and a error #indicator for the interval #many of the usual R parameters can be set:

Hello all, I am an undergraduate student who is having syntax issues trying to get error bars on my graph. This is the data, which I assigned the name "Saline" to. Time Average SEM 1 -20 0.000000 0.0000000 2 3 30 0.000000 0.0000000 4 45 3.227902 0.7462524 5 60 5.066664 1.1623944 6 80 6.107491 1.5027762 7 110

HOwdy I read R books about scale function for variable transformation. Acoording to this book scale function leads me to better regression results. Or am I worng? I hope somebody tell me about a scale function? Is it for variable transformation? -- Kum-Hoe Hwang, Phone : 82-31-250-3516Email : phdhwang@gmail.com [[alternative HTML version deleted]]

Hi I think this is mostly a question of preference for my part, but I think it would give an overall better quality feel. What I'm talking about is mostly the movement it uses. As I've come to understand, it uses velocity and direction, and a target point. This means that it updates it velocity and direction every X seconds (timestep), and gives it the possibility to be

Dear all, I am using the DeSolve Package to simulate a system dynamics model. At the problematic point in the model, I basically want to decide how many products shall be produced to be sold. In order to determine the amount a basic forecasting model of using the average of the last 12 time periods shall be used. My code looks like the following. ? [?] # Time units in month START<-0;

i use library(ncdf) to read this file as follow library(ncdf) sst.nc = open.ncdf(title) lonall = get.var.ncdf(sst.nc,'lon') latall = get.var.ncdf(sst.nc,'lat') precip = get.var.ncdf(sst.nc,'pre') close(sst.nc) if i use this method my pc freeze and not respond until i restart it is there -- View this message in context:

Hello All, Many thanks to the help I have received so far. Here is an example data set I hope to plot Data1 Year Data SE 1 2005 2 0.01 2 2006 4 0.01 3 2007 5 0.01 4 2008 2 0.01 5 2009 3 0.01 6 2010 6 0.01 Data2 Year Data SE 1 2006 32 1 2 2007 100 2 3 2008 60 4 4 2009 67 3 5 2010 8 1 Notice Data2 has one less years worth of data than Data1 (which is my

Dear list members, I would like to create two series of plotted mean values and error bars, yet with different locations along the x-axis. Plotting of first series using plotCI with the standard arguments goes without any problem. However I do not succeed to add the second series in the same plot, which should be horizontally shifted from the first series along the x-axis. The “add=TRUE”

Hi there, am trying to run a linear regression with a slope of 0. I have a dataset as follows t d 1 303 2 302 3 304 4 306 5 307 6 303 I would like to test the significance that these points would lie on a horizontal straight line. The standard regression lm(d~t) doesn't seem to allow the slope to be set. Any help very welcome. ed

Can anyone tell me how I can supply more than one graph to plotCI (gplots) at once? Below is what I tried, also with rbind instead of cbind. What is the way to do this (in general, I think)? Problem is that lines of 1-st and 2-nd series are mixed, while they have nothing to do with each other. I also tried calling plotCI with argument add=TRUE, which didn't seem to work (that is actually

summary: image.plot-ing two sets of netCDF data, with the second derived from the first. First plots to PDF as expected (title, data, legend). Second plots the data and title, but abends before drawing the legend, with > Error in if (del == 0 && to == 0) return(to) : > missing value where TRUE/FALSE needed > Calls: plot.layers.for.timestep -> image.plot -> seq ->

Dear R-list, I'm iterating several calls to plotCI [gplots], like so: plotCI( x = xvals.f[sorted], y = yvals.f[sorted], xlim = c(xmin, xmax), ylim = c(ymin, ymax), pch = plot_symbols[graph_idx], type = "b", lty = plot_linetypes[1], col = plot_colors[graph_idx], barcol = plot_colors[graph_idx], uiw = NA, xlab = "", ylab = "", add =

Got problems with plotCI (plotrix) I only want to plot the upper part of the error bar in my barplot I had the exact same commands working two months ago Now I wanted to change the legend and when I ran it again plotCI stopped working. To me it seems like there must some bug in R library(plotrix) library (graphics) x = matrix(c( 13.75516276, 3.944604404,