User: zhihua li

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zhihua li120
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Posts by zhihua li

<prev • 12 results • page 1 of 2 • next >
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Answer: A: install biomaRt failed - configuration failed for XML and RCurl
... thanks netters. my system is x86_64-unknown-linux-gnu, SUSE LINUX 10.0. i tried yast2 but couldn't find corresponding library files for libxml2 and librcurl. does anyone know about some source containing these packages? thank you very much! >From: Diego Diez >To: zhihua li >Subject: ...
written 13.2 years ago by zhihua li120
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install biomaRt failed - configuration failed for XML and RCurl
... Hi, netters, recently i've been trying to install biomaRt. I'm using Suse and have R 2.3.0 installed. > source("http://www.bioconductor.org/biocLite.R") > biocLite("biomaRt") Then I was told XML and RCurl are dependencies. And the program proceeded to download XML,RCurl and biomaRt, followe ...
biomart written 13.2 years ago by zhihua li120
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ask for some code to remove absent genes
... hi netters, i have a gene expression matrix where rows are genes and columns are conditions. The values are either "A"(absent) or "P"(present). There are 15 conditions in total. If a gene is absent in most of these conditions, say at least 13 out of the 15 values are "A", then I would like to remov ...
written 14.5 years ago by zhihua li120 • updated 14.5 years ago by stecalza@tiscali.it290
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Comment: C: load AnnBuilder and install XML
... Actually I've tried to install XML directly from CRAN. But it failed. > install.packages("XML") trying URL `http://cran.r-project.org/bin/windows/contrib/2.0/PACKAGES' Content type `text/plain; charset=iso-8859-1' length 27110 bytes opened URL downloaded 26Kb Warning message: No package "XML" o ...
written 14.7 years ago by zhihua li120
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load AnnBuilder and install XML
... Hi netters I've downloaded and installed AnnBuilder. When I loaded it, I was told that the dependent package XML had not been installed. According to the manual of AnnBuilder, the XML package can be found in CRAN. But I can't find a windows binary there. Instead, I went to http://www.omegahat.org/R ...
annbuilder written 14.7 years ago by zhihua li120 • updated 14.7 years ago by Seth Falcon7.4k
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Answer: A: finding and averaging replicate gene records
... Thanks to all your reply. It is true that by averaging expression values for (putatively) the same gene we will lose some information. But sometimes it's the reduction of the data size that is more favorable. Especially when one is trying to perform a computation-consuming algorithm to one's data. ...
written 14.7 years ago by zhihua li120
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finding and averaging replicate gene records
... Hi netter! In most microarray slides a single gene will be represented by multiple items. Sometimes it's unforseable because they have different genbank accession numbers and you will not find them until you get a unigene list for all your gene items. Now I have a dataframe . The rows are gene re ...
microarray written 14.7 years ago by zhihua li120
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Answer: A: asking for some code
... Ya, it works! maybe I made some mistakes writing the if...else clause yesterday. Thanks! >From: "STKH (Steen Krogsgaard)" >To: "zhihua li" >Subject: RE: [BioC] asking for some code >Date: Thu, 10 Mar 2005 14:20:28 +0100 > >Is there anything wrong with > >if (clause1) { ...
written 14.7 years ago by zhihua li120
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Comment: C: asking for some code
... Thanks for all the help! I'm on the border of resolving the problem but......... for the if-else clause, I alwayse got error message when using if..else if....else.....statement. I looked it up in the R mannual and found that R only have a "if....else..." structure, but doesn't have something like ...
written 14.7 years ago by zhihua li120
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asking for some code
... Dear netters, Now I have a matrix at hand. For each row, I want to find the Q5(the 5th quantile) and the Q95, and put them in a function fyn(), which will return two numbers n and m(nm, do sub3(x). The process goes on through each row in the matrix. This program isnot very complicated, but hard eno ...
process written 14.7 years ago by zhihua li120

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