Re: [R] Covariance-Variance Matrix and For Loops

That's very helpful Michael, thank you. I will add it to the arsenal. -- View this message in context: http://r.789695.n4.nabble.com/Covariance-Variance-Matrix-and-For-Loops-tp3859441p3863098.html Sent from the R help mailing list archive at Nabble.com. _

Re: [R] Covariance-Variance Matrix and For Loops

Surprising: must be newer update than I realizedanyways, here's the code if you want to add it manually: simplify2array <- function (x, higher = TRUE) { if (length(common.len <- unique(unlist(lapply(x, length > 1L) return(x) if (common.len == 1L) unlist(x,

Re: [R] Covariance-Variance Matrix and For Loops

Hello again, sapply works. However it does not explicitly call a simplify function, but rather seems to handle the case within its own body of code. I should be able to figure out basically what simplify2array does from the code though. function (X, FUN, ..., simplify = TRUE, USE.NAMES = TRUE)

Re: [R] Covariance-Variance Matrix and For Loops

I don't have access to older versions of R right now, but if you have a recent install you are probably running 2.13.1 or 2.13.0. Can you run the following: X <- list(a= rnorm(5), b= rnorm(5)) sapply(X, min) ? sapply calls simplify2array() so if this works take a look at the code for sapply (j

Re: [R] Covariance-Variance Matrix and For Loops

Thank you Michael. I think my initial problem may have been due to a 'clerical error' upriver, so I appreciate you taking the time to give me this help. Unfortunately, my version of R does not contain simplify2array() and does not find it in help (?simplify2array) - which is strange because I jus

Re: [R] Covariance-Variance Matrix and For Loops

Without seeing cvm1_list, I can't guarantee this will work, but consider this: testList = list(rnorm(500), rnorm(500), rnorm(500), rnorm(500), rnorm(500)) testMat = simplify2array(testList) covTest = cov(testMat) Running your code works on my testList, so I can't help there without a reproducible

[R] Covariance-Variance Matrix and For Loops

Hello, I am very new to R (as my Subject probably indicates). I want to do something that should, I think, be very simple. I have five vectors in a list and I want to construct a covariance matrix out of them. Given a 5X5 matrix cvm1, and the list of vectors, cvm1_list, I thought the following w