Create a background set from a comma separated Ensembl BioMart mapping file
创建一个背景设置从一个逗号分隔的Ensembl人类BioMart映射文件
译者:生物统计家园网 机器人LoveR
描述----------Description----------
This function determines which external IDs (e.g. microarray probe IDs) can be uniquely mapped to ENSEMBL IDs and returns the SIGORA IDs of such identifiers. In order to use sigs_background, you need to specify a vector containg the list of assayed genes as SIGORA IDs. A convenient way for creation of such a vector is to download a comma separated (.csv) file from Ensembl BioMart (http://www.ensembl.org/biomart/martview) that maps human ENSEMBL Gene IDs to microarray probe IDs. You would then run create_bg on the downloaded file.
此功能确定外部ID(例如芯片探针的ID)唯一映射到ENSEMBL的ID和返回SIGORA的ID,这样的标识符。为了使用sigs_background,你需要指定一个向量containg检测的基因的SIGORA的ID列表。这样的向量创造一个方便的方法是下载一个逗号分隔(CSV)文件映射人类的ENSEMBL基因身份证Ensembl人类BioMart(http://www.ensembl.org/biomart/martview)芯片探针的ID。然后,您可以运行create_bg下载的文件。
用法----------Usage----------
create_bg(filename)
参数----------Arguments----------
参数:filename
The name of the mapping file. This should be a comma separated (.csv) file (e.g. from BioMart) where the first column contains the human/mouse ENSEMBL Gene IDs and the second column contains the mapped probe IDs.
映射文件的名称。这应该是一个逗号分隔(CSV)文件(例如从BioMart)的第一列包含人/鼠ENSEMBL的基因ID和第二列包含对应的探针标识。
参见----------See Also----------
sigs_background
sigs_background
实例----------Examples----------
## Not run: [#不运行:]
## Assuming your data came from an Affymetrix HGu133B chip and you have[#假设你的数据来自一个Affymetrix HGu133B芯片,你有]
## downloaded the probe ID mappings to a file called ENS_hgu133b_Chip_uniq.txt: [#下载,探针ID映射到称为ENS_hgu133b_Chip_uniq.txt的文件:]
hgu133b_bg<-create_bg('ENS_hgu133b_Chip_uniq.txt')
## now you can run sigs_background with the background [#现在你可以运行sigs_background的背景]
##(bg-genes argument) set to hgu133b_bg.[#(BG基因参数)设置到hgu133b_bg。]