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Dear List, I am using the bioconductor package Category to do some gene enrichment analysis, and usually save my KEGGmnplot's using a dev2bitmap command. This has worked just fine, until suddenly earlier today I got this error-message: > dev2bitmap...
Thanks for these replies. @Peter - are these methods only suitable for pearson covariances? That would def explain my issues. Sorry for my ignorance, but I would highly appreciate an explanation. My original covariance matrix is calculated using spearman as well...
A clarification - yes, calculating the pearson covariance does give the expected results. I dont fully understand why yet, but many thanks for this help! 2012/8/12 Boel Brynedal <brynedal at gmail.com>: > Thanks for these replies. > @Peter - are these...
Hi, I have a 900,000,000*9,000 matrix where I need to calculate the correlation between all entries along the smaller dimension, thus creating a 9k*9k correlation matrix. This matrix is too big to be uploaded in...
Hi All, I'm working on analyzing a large data set, lets asume that dim(Data)=c(1000,8700). I want to calculate the canberra distance between the columns of this matrix, and using a toy example ('test' is a...
Hi, I want to simulate a data set with similar covariance structure as my observed data, and have calculated a covariance matrix (dimensions 8368*8368). So far I've tried two approaches to simulating data: rmvnorm from the mvtnorm package...
Hi, thanks for the reply. I am not assuming that the supplied covariance vector in any way captures the 'true' covariance matrix of the population, but thats not what I am after either. I just want to simulate data that...
Hi All, I want to select rows at random from a large data.frame while achieving a particular distribution defined my a given subset of this data.frame. How can I do this? More details and what I've done...
Stefan, that looks wonderful! I am most certainly going to try to download and use your 'wordspace', even though I am unsure on how to even download it at this point. Many thanks! But yes, I need the Canberra distance...
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