regressive model of l regressor variable regretless love regroup tebm regsnap regulamento tÉcnico m regular automatic upd regular beige leather regular borel measure regular chinese mba regular earnings regular expression - regular expression cl regular hydrochloric regular meeting regular mixed-layer s ...
5 5 5/1/09 UK FNA2 2 1 2 1 语句variable[condition] <- expression将仅在condition的值为TRUE时执行赋值。接下来我们创建agecat变量: 方法一: leadership$agecat[leadership$age>75]<- "Elder" leadership$agecat[leadership$age>=55&leadership$age<=75]< "Midele Aged" leadership$agecat[leadership$a...
relation operation relational communicat relational expression relational problem no relationally relationalalgebra relationconefficient relations between par relations deteriorate relationship between relationship between relationship between relationship closenes relationship diagram relationship marketin relationship of ...
语句variable【condition】<- expression,仅在conditio的值为TRUE时执行 即 变量【条件】<- 表达式 第二步创建agecat变量 leadership$agecat[leadership$age> 75] <- "Elder" leadership$agecat[leadership$age>= 55& leadership$age<=75 ] <-"Middle Aged" leadership$agecat[leadership$age <55] <- "Young"...
31、h.diff,ydiffs>which.diff,pch=16,cex=1,col=gray(.80)points(xdiffs<=which.diff,ydiffs<=which.diff,cex=.85)abline(mod,lwd=2,col=1)text(27.5,50,expression(paste("FittedValueofyat",x0)#这里expression的用法比较有意用、arrows(25,47,15,37,code=2,length=.10)ff»»»ff»»...
variable[condition] <- expression 该语句仅在condition的值为TRUE时,执行赋值操作: mydata$x1[ mydata$x1<3]<-1 也可以使用更为紧凑的写法 mydata<-within(mydata,{x1[x1<3]<-1}) 注意:逻辑运算符等号是== 三,变量的重命名 查看数据框的变量名,函数names(df)返回变量名的向量: ...
语句variable[condition] <- expression将仅在condition的值为TRUE时执行赋值 1> leadership$agecat[leadership$age<55]<-"Young"2> leadership$age[leadership$age=="99"] <-NA3> leadership$agecat[leadership$age>75]<-"Elder"4> leadership$agecat[leadership$age>=55&5+ leadership$age<=75]<-"Middle ...
语句variable[condition] <- expression将仅在condition的值为TRUE时执行赋值。 在指定好年龄中的缺失值后,接着使用以下代码创建agecat变量: 在leadership$agecat中写上了数据框的名称,以确保新变量能够保存到数据框中。 将中年人Middle Aged定义为55到75岁。如果一开始没把99重编码为age的缺失值,那么经理人5就将...
Li, Yumei, Xinzhou Ge, Fanglue Peng, Wei Li, and Jingyi Jessica Li. “Exaggerated False Positives by Popular Differential Expression Methods When Analyzing Human Population Samples.” 那么,既然我们有了p值自然就想要得到FDR以及logFC,因为只有...
as.data.frame(matrix),可以将矩阵数据转为数据框。 查看数据框 通过head()与tail()快速查看,默认提取前六行。head(df, n) 设定参数n 调整查看n行。 可以通过str() 快速了解数据集的结构信息。 ★ 1)数据集中的observation数目。通常也就是行数。