SILVA (from Latin silva, forest, http://www.arb-silva.de) is a comprehensive resource for up-to-date quality-controlled databases of aligned ribosomal RNA (rRNA) gene sequences from the Bacteria, Archaea and Eukaryota domains and supplementary online services. SILVA provides a manually curated taxonomy for all three domains of life, based on representative phylogenetic trees for the small- and large-subunit rRNA […]
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参考这个 DATA[is.na(DATA)] <- 0 （把NA换成0） 空格在你的dataframe显示为什么？ 如果就是空格的话，dat <- as.numeric(data) 能否把空格转换为NA？
有个例子： data.txt内容为： sex,height,weight F,158,51 F,162,55 M, ,72 M,173,57 M,166,64 在R读入时，空白变为NA > x <- read.table(“data.txt”,header=TRUE,sep=”,”) > x sex height weight 1 F 158 51 2 F 162 55 3 M NA 72 4 M 173 57 5 M 166 64 BEReX is a new biomedical knowledge integration, search, and exploration tool. BEReX integrates eight popular databases (STRING, DrugBank, KEGG, PharmGKB, BioGRID, GO, HPRD, and MSigDB) and delineates an integrated network by combining the information available from these databases. Users search the integrated network by entering keywords and BEReX returns a sub-network matching the keywords. […] |
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