similar to: expressions as axis labels

A statistical question, not specific to R. I'm asking for a pointer for a source of definitive descriptions of what types of data are best summarized by the arithmetic, geometric, and harmonic means. As an aquatic ecologist I see regulators apply the geometric mean to geochemical concentrations rather than using the arithmetic mean. I want to know whether the geometric mean of a set of

[Env: R 2.14.2 / Win Xp] In the script below, I want to select some variables from rrcov::OsloTransect, delete cases with any missing data, and subset the data frame Oslo to remove cases for two levels of the factor litho that occur with low frequency. The checks I run on my new data frame Oslo look OK, but I when I try to fit a multivariate linear model with lm(), I am getting an error:

I have searched the archives and instructions high and low but have not found what I need. I have a dataframe named Data with columns: AdjResND0 - the numeric result Parameter - the classification (chemical name) Sort - the order I want the chemical names to appear, with leading zeros so all are the same length Client.Name - the sample name I am trying to generate a series of 1 page barcharts,

Hello, I am using the SEM package in R to fit a multigroup latent variable model and ran into some difficulties. I have 2 questions: 1. First, I am getting the following error message and wondering what to do to fix it: Error in solve.default((N[g] - 1) * robustVcov(mod.g, adj.obj = adj.objects[[g]])) : system is computationally singular: reciprocal condition number = 4.52055e-23

---------- Forwarded message ---------- From: alis villiyam <aalisiyan at gmail.com> Date: Mon, Jul 27, 2009 at 9:47 AM Subject: randomized block design analysis in R To: bolker at zoology.ufl.edu Dear All user Hello, I'm a student and I have some trouble with the experimental (columns-experiments) design of my project. I use a randomized block design with 4 treatments including a

On Mon, 22 Jan 2024, Rich Shepard wrote: > As an aquatic ecologist I see regulators apply the geometric mean to > geochemical concentrations rather than using the arithmetic mean. I want to > know whether the geometric mean of a set of chemical concentrations (e.g., > in mg/L) is an appropriate representation of the expected value. If not, I > want to explain this to non-technical

Dear R Community, We have recently installed R 1.5.0 on several workstations. Ever since, if I try to extract certain numbers or lines from a file (which contains many NA's), I don't only get my desired line but all other lines which contain NA's. In a file with 15000 rows and 7500 NA's this is not very practical. In the earlier R-Version this worked when I typed in the

Hi folks, Where can I find document re "how to read anova output"? Google found many of them. But seemingly non of them can explain to me following output:- > tabA = c(5.67, 5.67, 5.55, 5.57) > tabB = c(5.75, 5.47, 5.43, 5.45) > tabC = c(4.74, 4.45, 4.65, 4.94) > tabs = data.frame(tabA, tabB, tabC) > tablets = stack(tabs) > anova(lm(values ~ ind, data =

Dear R-users, I'm trying to extract the exact location of the maximum value in a vector or a matrix, meaning I want not only the maximum itself but also at which position (e.g row 6, column 12) it is located. I appreciate any suggestions. Thanks, Patrick -------------- next part -------------- A non-text attachment was scrubbed... Name: patrick.vcf Type: text/x-vcard Size: 339 bytes Desc:

Hello R I can not figure out, how to add text string or number to lines like on this image: http://r.789695.n4.nabble.com/file/n3350452/graph.png I have some data series in text file. My script: require(graphics) require(stats) graf=read.table("file",header =FALSE,sep = "", dec = ",",fileEncoding = "", encoding = "unknown", skip=19,nrows=400)

I have measured values for 47 chemicals in a stream. After processing the original data frame through reshape2, the recast data frame has this structure: 'data.frame': 256 obs. of 47 variables: $ site : Factor w/ 143 levels "BC-0.5","BC-1",..: 1 1 1 2 2 2 2 2 2 2 ... $ sampdate : Date, format: "1996-04-19" "1996-05-21" ... $ Acid :

Some chemicals have concentrations at or below the method detection limit (MDL; 'less-thans') of 0.005 mg/L. When I look at the data frame that is how the concentration is displayed. But, when I ask for a summary() of that data frame column only 0 is displayed. How can I adjust the number of digits displayed by functions such as summary()? Rich

Hi all, I have a problem with an object inside a formula in a function that I make. I create an object named qvartemp. This object is OK, look the levels: > print(levels(qvartemp)) [1] "baixomedio" "alto" Now I create a new object with a new formula: > new.form <- as.formula(gsub(qvar,"qvartemp",as.expression(mma$formula))) Look this new object: >

I've had a question a few moments ago about how to create multiple objects from multiple files within a loop. Thanks for the quick answers, it worked with "assign", like this: for(i in seq(1,nfn,1)){ fin<-paste("/home/klimet/patrick/LAEGEREN/NEBEL/FOGEVENT2000/",fn[i],sep="") assign(paste("f", i, sep = ""),

Dear Users, I have the following text plotted inside a graphic: text(16200, 2.8*0.97, expression(NH[3]==0.33-1.1 %*% 10^-5 %*% day), adj=c(1,1)) I need to include square brackets in the expression around the ammonia to have it plotted like that: [NO3-]. I tried instinctively to use %[% to plot the brackets, but it did not work. Does anybody of you know what is the correct syntax to plot

Hi all, - how can I do a barplot with rotated axis labels? I've seen the example for just a plot in the FAQ, but I'll missing the coordinates to plot my text at the right position beneath the bars. Is there any (easy?) solution? - how can I set the y-axis in a barplot to logarithmic scale? Many thanks in advance! Best Regards Tom --

pairwise.t.test is returning NAs when one of the samples only has one entry, while TukeyHSD returns results (maybe not trustworthy or believable, but results). I stumbled on this because I did not realize one of my samples only had one entry while most of the others had several hundred, so I realize this is not a desirable situation. I'm really just curious about the difference between how

Dear all, I'm using the "ape" package in R and want to draw a phylogenetic tree with not only the tip labels but also some labels for the edges. e.g. Mark the edge AB as "m" in the tree ABC. Couldn't find a way to do that. Can someone help? Thanks, Hua

Dear R Community, When making a summary with a vector, the result is "numeric" and I can recall its components (like median, mean, etc.) for further use. However, if I use summary with a matrix, the result is of mode "character" (like "Median : 1.2127") and I cannot extract the results for direct further use. Thanks for any hints, Patrick -------------- next part

>>>>> Rich Shepard >>>>> on Mon, 22 Jan 2024 07:45:31 -0800 (PST) writes: > A statistical question, not specific to R. I'm asking for > a pointer for a source of definitive descriptions of what > types of data are best summarized by the arithmetic, > geometric, and harmonic means. In spite of off-topic: I think it is a good