similar to: DOE in R

Hi. I'm a student at Simon Fraser University in British Columbia, Canada. I can't for the life of me figure out how to plot a 3D surface (A 3D response surface to be more specific) in R. I found your email address on a web board, and saw someone mention wireframe(), but using the help in R yielded no results. Any suggestions? Thanks. Dean Vrecko

Hi. I'm a student at SFU in Canada. The basic thing I want to do is calculate means of different strata. I have 2 vectors. One has the values I want to take the means from, the other is the four strata I am interested in. So I essentially want to break up the information vector into the four strata and calculate four means, one for each stratum. How can I do this in a reasonable way? Thanks

Hello. I'm looking for a way to add a line in a plot of a points that should lie along a particular line. Can I add a line to the 'plot()' function, maybe using 'abline()' so that the line is visible in the graph of 'plot()'? How? More generally, can I overlay plots over one another? Thanks. Dean Vrecko Simon Fraser University

Hello, I am having trouble by using the write.table function to write a data frame of 4 columns and 7530 rows. I don?t know if I should just use a sep="\n" and change the .xls file into a .csv file. Thanks in advance ----- Anna Lippel new in R so be careful I should be asking a loooooooot of questions!:teeth: -- View this message in context:

Dear List, I am looking for a function `Pseudo standard error' (PSE), which is available in S+ DOX (design of experiemnt) module - Is there a similar function available in R? Reference for PSE function is in the paper: 'Quick and easy analysis of unreplicated factorials' by Russell V. Lenth, Technometrics, 1989, 31, 4, 469-473. Thanks. -Nitin

The general nature of your question means there are a multitude of answers. if you type '?abline' it will give you an example of a line drawn over a plot. type ?segments, ?lines, ?points, ?text and go through the examples and try them out The help pages to the base package 'grid' includes an introduction to using the various drawing mechanisms see ?par for the 'new'

I had a question about Random Forests. I have a text file with 10 dichotomous variables and a bivariate response vector. I read this file into R as a data frame, and then used the command "randomForest(Response ~., dataset, etc.." where "Response" is the column header of the response variable and "dataset" is the name of the data frame. I get an error that says

Hi all, I imported a file (in CSV format) into R for processing, then imported the result into MySQL. However, there are *carriage return* characters (hexadecimal: *0D*) that are appended to the characters in the last field of the table. i.e *\r* appended to the character values (as shown below) Before importing into MySQL: asdf After importing into MySQL: asdf*\r* ** ** Are there any options

Hello, I have another question.... I have a data frame that looks like this: a b 2007-03-31 "20070514" "20070410" 2007-06-30 "20070814" "20070709" 2007-09-30 "20071115" "20071009" 2007-12-31 "20080213" "20080109" 2008-03-31 "20080514" "20080407" 2008-06-30

Hi there, I have a data frame with a column named "Flags", whose contents are strings containing any of the following characters, multiple characters allowed: A,B,C,D,E,F,G. Here is the head: GeocodeID PlaceID CountyCode CBSACode StateProvCode PropertyTypeGroupID Flags 1 0 0 0 0 AK 1 ABC 2

Dear Group, I am working with a large dataset where I need to select for each unique id the the unique lastpk row. Here is a sample subject: id wtdt wt lastpk 64050256 2010-09-18 275 2010-09-16 64050256 2010-09-19 277 2010-09-18 64050256 2010-09-20 272 2010-09-18 64050256 2010-09-21 277 2010-09-18 I want the result as:

Hi all, I'm new to the list but have benfited from it quite extensively. Straight to my rather strange question: I have a data frame that contains mapping rules in this way: ACCOUNT, RULE COLUMNS, Effective Date The dataframe comes from a database that stores all dates. What I would like to do is to create a data frame with only the most recent rule for each account. In traditional

I have a file like this: id n1 n2 n3 n4 n5 n6 1 3 4 7 8 10 2 2 4 1 2 4 3 10 3 7 0 0 0 0 8 4 10 1 0 0 2 3 5 11 1 0 0 0 5 what I want to do is: only if n2=0 and n3=0 and n4=0 and n5=0 then delete the row. how can I do that? thank you, karena -- View this message

Hi. I'm sure this is a simple problem, yet I can't seem to get simple help for it. I am simply trying to move my xlab in plot(). I am currently using the following commands: plot(c(-0.25,18),c(0, max(patient10)),type="n", ylab="SD of POST estimator", xlab="Scans \n (a)") But when the plot prints, the xlab is printed over top the xaxis. I tried adjusting

Hi I'd really like to get a bar plot showing the means of my anova data. I have looked everywhere and can only seem to find instructions for 2 way anova's. I basically want to look at the mean condition of my subjects spilt by age, sex and year (as a factor rather than a continuous variable, hence Anova and not Ancova). and want to show it firstly as a bar graph with standard error. I

Hi everyone, I am fitting a cox proportional hazard model with a continuous variable "x" as the covariate: fit<-coxph(Surv(time, status)~x) Now I wanted to make a plot of survival probability vs. the covariate, and the 95% confidence interval for the survival probability. It's just like a Kaplan-Meier Survival curve, except now the x axis represents the value of covariate, not

Hi All, I have a data frame with a group of variables named b1, b2, b3, ..., b18. These variables take the value 1, 2 or NA. For each observation, I want to do some computation by looping over the values for the group of variables: b1 to b18. In STATA I would do: forval i=1/18 { --- use b`i' for computation ---- } How can this be done in R? Deepankar

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DearR Users, I have a problem which I think you might be able to help. I have a dataframe which I'm trying to "filter" following different groups I specified. It's a little hard to explain, so here is an example: My dataframe: ESS DHP 1 EPB 22 2 SAB 10 3 SAB 20 4 BOJ 14 5 ERS 28 11 SAB 10 12 SAB 22 13 BOJ 26 20 SAB 10 21 SAB 22 22 BOJ 32 29 SAB 14 30 SAB

It looks like your printouts are based on the R summary() function? The function lists the number of cases in the 5 largest categories when the variable is coded as a function. Then it indicates how many other categories are present. This is described on the manual page for function summary(). In the first case the duplicates probably represent cases in your source data (a spreadsheet?), where