Subsetting is no exception, with both the brackets [] and subset() function accomplishing the same thing. You can choose between the two, depending on whether you prefer low-level control or high-level simplicity. Consider advancing your skills with our Machine Learning Scientist in R career ...
范例1: # R program to create#subsetof a data frame# Creating a Data Framedf<-data.frame(row1 =0:2, row2 =3:5, row3 =6:8)print("Original Data Frame")print(df)# Creating a Subsetdf1<-subset(df,select= row2)print("Modified Data Frame")print(df1) 输出: [1] "Original Data Fr...
shrinkage <- function(fit, k=10, seed = 1){ require(bootstrap) theta.fit <- function(x, y){lsfit(x, y)} theta.predict <- function(fit, x){cbind(1, x) %*% fit$coef} x <- fit$model[, 2:ncol(fit$model)] y <- fit$model[,1] set.seed(seed) results <- crossval(x, y...
# seurat-object-4.0.4/R/seurat.R:2497:subset.Seurat <- function( # seurat-object-4.0.4/R/assay.R:858:subset.Assay <- function(x, cells = NULL, features = NULL, ...) { # 这是一个S3类,有针对 Assay 和 Seurat 类的函数实现。 (1) subset.Seurat() #' @describeIn Seurat-methods ...
【题目】设$$ E \subset R ^ { n } $$,点$$ x \in R ^ { n } $$到集合E的距离定义为$$ p ( x , E ) = i n f \rho ( x , y ) . $$证明:(1)若E是闭集,$$ x \in E $$,则$$ p ( x , E ) > 0 $$(2)若E是E连同其全体聚点所组成的集合(称为E...
在R中,我们可以使用简单的c()函数来创建一个向量,c 的本意即为concatenate(连接)。下面的代码中小编创建了一个包含五个元素的向量,并将其赋值给变量x,而x的本质是一个指针,通过这个指针可以对向量元素进行增删或者更改的操作来进行重赋值。 x <- c(18,34,49,52,81) ...
解析 答案见上3【解析】$$ x \in R | x ^ { 2 } + 1 = 0 = \varnothing , x \in R $$ $$ x ^ { 2 } - 1 = 0 = - 1 , 1 $$,故集合A是集合 {-1,1}的非空子集,所以集合A的个数为 $$ 2 ^ { 2 } - 1 = 3 . $$ . ...
Results: All patients showed retinal alterations, but early diagnosis was associated with a milder phenotype and a longer preservation of visual function. Among symptomatic patients, only one showed mild retinal involvement at the time of diagnosis. Conclusion: Despite the small number our study ...
In R, how to split/subset a data frame by factors in one column?,按照某列的值拆分data.frameMydataislikethis(forexample):IDRateState124AL235MN346FL434AL578MN699FLIwanttosplitthe...
3 InSet是一个表示正整数集合的类,成员函数InSubSet是判断集合B是否为集合A的子集,IsMemberOf来判断一个正整数是否在此集合中,请编写成员函数InSubSet,输出: 集合A:1 2 3 5 8 10 集合B:2 8 集合B是集合A的子集 相关知识点: 试题来源: 解析 if (end < set.GetEnd()) return false; for (int i...