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How to use grep to match multiple strings in the same line? grep 'string1\|string2' filename grep -E "string1|string2" filename How can I grep for a s 阅读全文
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打开虚拟机进入Ubuntu系统，首先要安装VirtualBox增强功能包(VBoxGuestAdditions) 。 点击运行后，系统会自动安装，安装完成后要求重启系统。 在本机系统设置一个共享文件夹，用于与Ubuntu交互的区域空间。 右击状态栏上共享文件夹图标或菜单栏“设备-共享文件夹”，打开共 阅读全文
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安装方法一（下载安装；繁琐）： 1 下载R源代码原码下载地址https://cloud.r-project.org/https://cloud.r-project.org/src/base/R-3/R-3.4.2.tar.gz2 安装编译环境yum -y install gccyum install 阅读全文
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centos下安装完EPEL源, 然后更新一下yum缓存, 如果发现这样的错误:Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again这就表明需要更新CA证书了，那么只需要更 阅读全文
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A carriage return linefeed (CRLF) is a special sequence of characters, used by DOS/Windows, to signify the end of a line of text. However, in *nix, on 阅读全文
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row.names(x)row.names(x) <- value rownames(x, do.NULL = TRUE, prefix = "row") rownames(x) <- value colnames(x, do.NULL = TRUE, prefix = "col") colname 阅读全文
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REF: https://puma.princeton.edu/cgi-bin/tools/viewSchema.pl?table=CLINICAL_SAMPLE http://isb-cancer-genomics-cloud.readthedocs.io/en/latest/sections/p 阅读全文
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https://www.r-bloggers.com/number-formatting/ https://stackoverflow.com/questions/3443687/formatting-decimal-places-in-r https://stat.ethz.ch/R-manual 阅读全文
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ERROR: The estimated pi0 <= 0. Check that you have valid p-values or use a different range of lambda. 重现错误的代码： ps <- runif(3e5)library(qvalue)ps <- ps 阅读全文