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sub(pattern, replacement, x, ignore.case = FALSE, fixed = FALSE) #大致与 grep 一样,但是是搜索出来并将之用 replacement 替换掉 #注意一点,sub("\\s", ".", "Hello There") 返回值为 Hello.There, 其中***"\s"是一个用来查找空白的正则表达式***,而用两个"\"因为一个"\"在 R 中为转义符...
str_replace_all(string=.,pattern="t",replacement="u") 字符串连接 # pastepaste("control",1:3,sep="_")# str_c()library(stringr)str_c("control",1:3,sep="_") 字符串拆分 # strsplittext<-"I love R.\nI'm fascinated by Statisitcs."cat(text)strsplit(text,split=" ")strsplit(text...
He seeks to defend this claim via a replacement, and hence a redefinition, of the relevant critical terminology. Rather than adopting the standa... R. R. Edwards - 《Swiss Papers in English Language & Literature Spell》 被引量: 2发表: 2011年 Structural basis of ribosomal 30S subunit ...
3R是就是Reduction（减少）、Replacement（替代）、Refinement（优化）的简称。当前在西方国家受动物保护运动的影响，在实验动物行业内，兴起了“三R”运动，即实验动物的减少、替代和优化。 “减少”就是利用体外方法或其他非生物学方法减少活体动物使用的数量。比如生物研究领域制备单克隆抗体，就要把一种细胞打到小鼠...
滥用化学农药会引起的“3R”问题是指以下哪几个?某工程采用《建设工程工程量清单计价规范》,招标人提供的工程量清单中挖土方的工程量为2600m3,投标人根据其施工方案计算出的挖土方作业量为4300m3,完成该分项工程的直接工程费为76000元,管理费20000元,利润5000元,其他因素均不考虑,则投标人应报的综合单价为( )
Spectrum Health in Grand Rapids, Mich., has developed a quality improvement (QI) program that focuses on 35 high-volume adult and pediatric conditions, including joint replacement. A key focus of Spectrum Health's quality efforts has been on improving care for ...