search for: anlaysi

Hello all, I'm dealing with geochemical analyses of some rocks. If I use the full composition (31 elements or variables), I can get reasonable separation of my 6 sources. Then when I go onto do LDA with the 6 groups, I get excellent separation. I feel like I should be reducing the variables to thos that are providing the most discrimination between the groups as this is important

...e! With some help from our head of department, they have now agreed to install R but only if they receive an email from 'R' ensuring that it is licensed for commercial use, is compaitable with Windows XP and will not affect the networked computer system here. My only other option for data anlaysis is Excel, we have no money for S-plus or any other stats programme. Can anyone suggest anything or send me a suitable email? Many thanks, Georgina ***************************************************************** The information contained in this message may be confide...{{dropped:12}}

Hi, I am using R for microarray data anlaysis. When I normalize my data, it converts all my data in to log base 2 values. how can I convert back to log base 10..is there any function in R which I can use or how can I take anti log. or is there any function in R for antilog. Please let me know,..if anyone knows.. Thank you so much, Sauri...

...though I were working with 219*17-17=3706 degrees of freedom, when in fact I have but 219-17=202 df. I'm probably being dense on this one, but is there a way I can set df to the proper number so that summary.lm does the correct significance test? Or should I be doing an entirely different anlaysis? Thanks, -jlb -- ************************************ Joseph P. LeBouton Forest Ecology PhD Candidate Department of Forestry Michigan State University East Lansing, Michigan 48824 Office phone: 517-355-7744 email: lebouton at msu.edu

Hi~ helpers. I was surprised by R data type. I use to data type like table. I don't know R allow several data type such as list, number, matrix in the same matrix. I want to use plsr in pls package to anlaysis data. So, I read R help and example of plsr. that example show me that data as yarn has three colname as NIR, density and train. the NIR was 268(No. of col) X 71(No. of row) matrix, but density was just 71 list yarn[1] indicate NIR, and yarn[2] indicate density so I just tested like that TES...

Hello, Is it possible to include information about phylogenetic relatedness among species (when species are replicates for each study within a meta-analysis) in a meta-anlaysis in the metafor package? Alternatively, I wonder if the method f Lajeunesse 2009 American Naturalist has been adopted in R in any fashion? Thanks, Scott Chamberlain [[alternative HTML version deleted]]

I have R version 2.9.1 on my computer and the anlaysis is not working because I need to update to R version 2.12.0 the latest release. The person incharge of IT tried to download R version 2.12.0 but .exe file referenced in install isn't there - What might we be doing wrong? We have downloaded as tar.gz, uncompress then look for .exe fil...

...be regressed upon suitably transformed lagged values of another variable(s)]. I am quite new to the R-language and am not very much aware of the availbaility of suitable package(s)/ code in the language. Can any one help me in letting me know of appropriate package/procedural steps to undertake the anlaysis. Kindly let me know as well, format of the input data file for such a package.   Regards   Amarjit Singh Sethi Bollywood, fun, friendship, sports and more. You name it, we have it on http://in.promos.yahoo.com/groups/bestofyahoo/ [[alternative HTML version deleted]]

I have just put up a new executable as a replacement for the one in rseptbeta.zip there have only been a few changes; mostly to the menu's. I am about to start on a major overhaul including getting survival to work and grabbing the 0.60 version once it's stable. Please let me know about other enhancements you want.... robert

I have just put up a new executable as a replacement for the one in rseptbeta.zip there have only been a few changes; mostly to the menu's. I am about to start on a major overhaul including getting survival to work and grabbing the 0.60 version once it's stable. Please let me know about other enhancements you want.... robert

dcemriS4: A package for medical image anlaysis The dcemriS4 package is a major update, and S4 implementation, of the dcemri package.? All previous functionality has been replicated, for DCE-MRI and DWI, with specific emphasis on cancer imaging applications.? Additional major features include: ? o S4 classes for NIfTI and Analyze data format...

...I am about > > to start on a major overhaul including getting survival to work and > > grabbing the 0.60 version once it's stable. > > > > --->> Please let me know about other enhancements you want....<<--- > > I'm very interested in time series anlaysis (acf, pacf, arima modelling, and all > other) is a possible enhancement for the WINDOWS 95 version of R!(?) > > Thanks. > > Andrea Rossetti. > Well, what I meant was enhancements to the user interface. I'm afraid that I don't have enough time to add statistical fu...

R-help, I am trying to perform a basic anlaysis of the BreastCancer data from "mlbench" using the svm() function in "e1071". I use the following code library("e1071") library("mlbench") data(BreastCancer) BC <- subset(BreastCancer, select=-Id) pairs(BC) model <- svm(Class ~ ., data=BC, cross=10)...

...study showed a potential failure level of 1%. A sample size was calculated to detect a potential shift from this 1% level to a 2.5%, at an alpha level of 0.025 and beta of 0.1. The sample size required is therefore 756 per condition. Acceptance criteria is 14 failures or less per condition. Power anlaysis of one proportion: Numeric Results for testing H0: P=P0 versus H1: P>P0 Test Statistics: Exact Test Power N Proportion Given H0 Proportion Given H1 Target Alpha Actual Alpha Beta (P0) (P1) 0.9007 756 0.01...

dcemriS4: A package for medical image anlaysis The dcemriS4 package is a major update, and S4 implementation, of the dcemri package.? All previous functionality has been replicated, for DCE-MRI and DWI, with specific emphasis on cancer imaging applications.? Additional major features include: ? o S4 classes for NIfTI and Analyze data format...

...e 'Error in catmapobject$ci : $ operator is invalid for atomic vectors' Am I right in thinking the order should be follows: catmapobject1<-catmap('rs2305764.txt', 0.95, TRUE, TRUE) catmap.forest(catmapobject1, TRUE, TRUE) I think I am failing to assign the results of the meta anlaysis - catmap('rs2305764.txt', 0.95, TRUE, TRUE)--- to an object in R, and then have catmap.forest act on that object. thanks Matthew [[alternative HTML version deleted]]

...code, or what earlier passes have done, it will reschedule everything, fully serializing dependence chains. At that time, we noticed horrible performance on some crypto benchmarks. We decided to pay a small price in spill code for avoiding worst-case performance. We also realized after performance anlaysis, that incrementally tuning these heuristics to avoid test-suite regressions was not leading toward an overall better scheduler for real programs. We decided that, since some targets need an MI-level scheduler anyway, we should redirect efforts into that project. The high-level design goal of MI s...

...(Li, Bingshan) 6. Re: How to plot "greater than" symbol on the x-axis (John Fox) 7. Re: periodicity validation (stephen sefick) 8. Task View for Chemometrics and Computational Physics (Katharine Mullen) 9. Re: Variable Selection for data reduction and discriminant anlaysis (Katharine Mullen) 10. Re: How to plot "greater than" symbol on the x-axis (Henrik Bengtsson) 11. Re: How to plot "greater than" symbol on the x-axis (Henrik Bengtsson) 12. Re: How to plot "greater than" symbol on the x-axis (Gabor Grothendieck...

Hi Andy, We have done some experimental evaluation of the different schedulers in LLVM 3.3 (source, BURR, ILP, fast, MI). The evaluation was done on x86-64 using SPEC CPU2006. We have measured both the amount of spill code as well as the execution time as detailed below. Here are our main findings: 1. The SD schedulers significantly impact the spill counts and the execution times for many