search for: stropharia

Hi everyone, i'm having a problem extracting objects out of functions i've created, so i can use them for further analysis. Here's a small example: # --------------------------- test <- function(i, j){ x <- i:j y <- i*j z <- i/j return(x,y,z) } # --------------------------- This returns the 3 objects as $x, $y and $z. I cannot, however, access these objects

Dear R users, I have various vector geometry operations to perform on 3-D coordinate data located on multiple (500+) csv files. The code I have written for the calculations works just fine. I have written a 'for' loop to automate the task of extracting the coordinates from the files and perform the analyses. The loop works reasonable well, but if the number of csv files is greater than

Dear R users, I've had no joy finding a solution to this online or in any of my R books. Many thanks in advance for any help you can give. I'm seeking to output a data frame (or matrix - it doesn't matter which for my purposes) to a .txt file, but omit any row or column names. The data frame that I'm using doesn't actually have column or row names to start with as it has been

Any help with this problem would be greatly appreciated: I need to produce a custom plot i haven't come across in R. Basically, I want to show means, 1st standard deviation and 5th and 95th percentiles visually, using something resembling a boxplot. Is it possible to completely customize a boxplot so that it shows means as the bar (instead of, not as well as medians), standard deviations at

R users, I've been searching around for a solution to this for a few days, any help would be appreciated. I have working R code (a custom function) that transforms 3D coordinate data into angles (between any three sets of coordinates). The code outputs a single scalar (an angle). For my research I will have several hundred .csv files containing coordinate data - each file is a set of

Dear R users, I am running R 2.10.0 on OS X 10.5.8. I had been running 2.10 successfully for about a week (and have used previous R versions for 2+ years on the same computer) until 2 days ago it failed to start up for me. Now when I try to start R, the application tries to initiate for several minutes then crashes. Looking at the activity monitor, my memory usage goes from having about 1.6Gb

Dear R users, I am running R 2.10.0 on OS X 10.5.8. I had been running 2.10 successfully for about a week (and have used previous R versions for 2+ years on the same computer) until 2 days ago it failed to start up for me. Now when I try to start R, the application tries to initiate for several minutes then crashes. Looking at the activity monitor, my memory usage goes from having about 1.6Gb

Dear R users, I want to perform an exact permutation of multisets. I have looked at the coin package, but it doesn't seem to offer what I am looking for. I want to perform permutations (exact - without duplications) on multisets of scalars (e.g., the multiset 0,0,1,2,2). I want to output all the possible permutations into a data frame so that each multiset permutation occupies a row (or

R users, Is it possible to do 'exact' permutation tests in R? If I run a perm.test or permutation.test.discrete on a data set that has, for example, 720 possible permutations, will that test permute ALL of those possible permutations, or will it just permute 720 random permutations (thus allowing some possibilities to repeat and some not to be permuted at all)? I'm a little confused

Dear R users, I am conducting multiple comparisons among 12 groups (after a significant F-test) that are heteroscedastic (as judged by a significant Levene's test). It seems from the literature that the Games-Howell post-hoc test is the most appropriate for these data - but, I can't seem to locate a function on the R-site or CRAN or the help lists that implements this test in any R

Dear R users, i am fairly new to R and am having trouble creating code to solve a problem. I've searched the list, combed Crawley's 'R book' and several others, but can't quite find what i want. I want to generate permutations of various 'blocks' of 14 numbers. Each number within a block is a character state for a particular biological taxon. In the example below, for