search for: spectrometry

...a statistics question but here I go. I am using the nls function with a Gaussian distribution, see coding below. When I run the nls I get an error back saying that I have a linear gradient. I then, of course am unable to do anything else. The data that I am using are intensity values from some mass spectrometry data. Is there something I can do to stop the linear gradient, and I dare to ask why am I getting a linear gradient. I apologies if I haven't supplied enough information or I have made some mistake in my coding. The coding below works on some of the data but not all. Thank you f...

..., see below: https://cran.r-project.org/web/packages/bst/index.html The order of vignette links on CRAN is different from what I hoped for: > vignette(package="bst") Vignettes in package 'bst': pros Cancer Classification Using Mass Spectrometry-based Proteomics Data (source, pdf) static_khan Classification of Cancer Types Using Gene Expression Data (Long) (source, pdf) khan Classification of Cancer Types Using Gene Expression Data (Short...

...ect...... > index [1] "10" "40" Is there a way to take cc[i:index[i-1],] to another format as to where each block could be worked on separately. ie so in one block would be rows1:10 the next block would be rows11:40 and so on. Thanks, Paul -- Research Technician Mass Spectrometry o The / o Scripps \ o Research / o Institute

...ke to check A and B by these columns. If I find that the number in A[9,x] and B[9, x] are the same then I want to remove the row that it is comparing from A. So overall, if something appears in B then I remove it from A. Cheers, Paul Research Technician Mass Spectrometry o The / o Scripps \ o Research / o Institute [[alternative HTML version deleted]]

Dear colleague, Just an e-mail to know if they are people working in the field of chemoinformatic that are using R in their work. If yes I was wondering if we couldn't exchange tips and tricks about the use of R in this area ? Best regards Fred Ooms [[alternative HTML version deleted]]

...lt;- data B 100 400 200 100 C 500 400 200 1000 ^ | samples I would like to plot these however, all I get is a very messed up plot. It may be due to the size of the matrix, it is 7746 rows long. But I thought for R that shouldn't make a difference. Cheers, Paul Research Technician Mass Spectrometry ? o The ? / o Scripps ? \ ? o Research ? / o Institute

Hello, I'm doing some scripting and I've noticed that R doesn't seem to have an if (cond){ do }ifelse (cond) { do } else { do } type block. Is this correct or am I missing something. THX Paul -- Research Technician Mass Spectrometry o The / o Scripps \ o Research / o Institute

...is/looks like: > dim(xs) [1] 400 4 > xs[1:5,] x y Z1 Z2 1 27172.4 19062.4 0 128 2 27000.9 19077.8 0 0 3 27016.8 19077.5 0 0 4 27029.5 19077.3 0 0 5 27045.4 19077.0 0 0 Cheers, Paul -- Research Technician Mass Spectrometry o The / o Scripps \ o Research / o Institute

...earch UK Manchester Institute (www.cruk.manchester.ac.uk). Located in Manchester UK, the Cancer Research UK Manchester Institute is a centre for excellence in cancer research. We occupy state-of-the-art laboratories and provide exceptional core facilities including next generation sequencing, mass-spectrometry, advanced imaging, High Performance Computing, bioinformatics, histology, and flow cytometry. We are core-funded by Cancer Research UK (www.cancerresearchuk.org), the world?s largest cancer organisation, are an Institute of The University of Manchester (www.manchester.ac.uk), and are adjacent to Th...

...(ing) with an error code of make:*** [RS-DBI.o] Error 1 I also tried the other way that the help suggested of putting the dir in the R CMD INSTALL command but that didn't work either giving me the same help menu. I am on opensuse 10.0 x86, and yes I su(ed). Cheers, Research Technician Mass Spectrometry o The / o Scripps \ o Research / o Institute

...e made this to show. I have not produce the code yet to make my similitary matrix. Does anyone know a method to do this or do I have to write something. :( If I do any starter code :D jj. If I've read something wrong or misunderstood my apologies. cheers, Paul -- Research Technician Mass Spectrometry o The / o Scripps \ o Research / o Institute

...rg/web/packages/bst/index.html > > The order of vignette links on CRAN is different from what I hoped for: > > > vignette(package="bst") > Vignettes in package 'bst': > > pros Cancer Classification Using Mass > Spectrometry-based Proteomics Data (source, > pdf) > static_khan Classification of Cancer Types Using Gene > Expression Data (Long) (source, pdf) > khan Classification of Cancer Types Using Gene >...

....mcrc.manchester.ac.uk/>). The ACBBG incorporates postdoc-level bioinformaticians and computational biologists who provide collaborative support for the analysis of high throughput genomics data, including ChIP seq, RNA seq, whole genome DNA sequencing, microarrays and quantitative protein mass spectrometry. Based within the ACBBG, and part of an interdisciplinary team featuring programmers, computational biologists and bench scientists, senior analysts work collaboratively for extended periods with other research groups within the Institute, where they are able to bring their expertise in genomics an...

...local maxima of this function (should be about 4000). Is there a native routine for R? Thanks in advance Eryk. -- _|_ \|/ \|/ Eryk Witold Wolski tel :0049-(0)30-8413-1543 w w ?v? 'v? \'v'/ MPI Moleculare Genetik fax :0049-(0)30-8413-1139 | | /| |\/| |\ | | Mass Spectrometry Group http://www.molgen.mpg.de /.^.\ m m m m m m mail :wolski at molen.mpg.de /|\ -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info",...

...r to be functional ? and to act in a variety of regulatory roles within the cell. The successful applicant will join a highly interdisciplinary team comprising numerical- and biological-scientists who together exploit the power of new technologies such as single-cell RNA sequencing and protein mass spectrometry to investigate the fundamentals of gene expression in cancer. This project will involve applying machine learning and pattern recognition techniques to high volumes of RNA-sequencing data representing a combination of single cells, clinical samples, and experimental data generated using cell lines....

...rg/web/packages/bst/index.html > > The order of vignette links on CRAN is different from what I hoped for: > > > vignette(package="bst") > Vignettes in package 'bst': > > pros Cancer Classification Using Mass > Spectrometry-based Proteomics Data (source, > pdf) > static_khan Classification of Cancer Types Using Gene > Expression Data (Long) (source, pdf) > khan Classification of Cancer Types Using Gene >...

...group (Applied Computational Biology and Bioinformatics -- ACBB) and applying state of the art techniques (see for example, xmap.picr.man.ac.uk) to integrate, analyse and interpret datasets arising from the latest generation of microarrays (including exon, SNP and tiling arrays), quantitative mass-spectrometry and next generation sequencing. We write a lot of Bioconductor and R code - hence my posting to this list... I've included brief details below -- there's more information in the jobs section of our website (http://bioinformatics.picr.man.ac.uk) Cheers, Crispin ---- Postdoctoral Scienti...

...} } } } return (clean) } I hope that I have explained myself well. If not please let me know and I'll try to explain more. Cheers, PB Research Technician Mass Spectrometry o The / o Scripps \ o Research / o Institute [[alternative HTML version deleted]]

...reMZ, preZ,rtMSpeaks, paste(MSMSpeaks, collapse=":")) values<-rbind(values,temp.values) } #else cat(".") ? } return(values) write.csv(values, file="xcms.tsv", col.names=NA, sep="\t") }) -- Research Technician Mass Spectrometry o The / o Scripps \ o Research / o Institute

...poetry or R help. How can I make a negative number positive. Such as -5 to be +5 I tried +(-5), but that didn't work. So no, I don't mean taking a -5^2 just to get a positive number. This is in a function so it's not just -5 it's x. :) Thanks, Paul -- Research Technician Mass Spectrometry o The / o Scripps \ o Research / o Institute