which()R语言中的函数用于返回对象的索引,这些索引对于作为参数传递的逻辑运算返回true。 用法: which(x, arr.ind) 参数:x:逻辑对象arr.ind:显示索引的布尔值 范例1: # R program to illustrate # the use of which() function # Create a matrix x <- matrix(1:9,
Example 1: Basic Application of which FunctionExample 1 illustrates how to use the which() function in the R programming language. First, we have to create some example data:x <- c(1, 5, 4, 8, 4) # Create example vector x # Print example vector # 1 5 4 8 4...
We’ve used the sapply function in R along with the which() method here. The which() function has returned only the names of numerical columns as per the input condition. If you a data analyst, then which() function will be invaluable for you. Which function with Matrix in R Finally, ...
We’ve used the sapply function in R along with the which() method here. The which() function has returned only the names of numerical columns as per the input condition. If you a data analyst, then which() function will be invaluable for you. Which function with Matrix in R Finally, ...
#attention:i可以用任意的字母表示,j,k,l等等,i只是一个指代,具体还是看in后面是什么。 #1:3 可以换成向量,包括numeric、character等等,i会遍历向量中的各个元素,循环 3、while count <- 0 while(count < 5){ print(count); count <- count + 1 ...
In this tutorial, we will learn what control statements in R programming are, and its types. Here, we will discuss If, If- Else and for loop in R programming.
Writing for, while loops is useful when programming but not particularly easy when working interactively on the command line. There are some functions which implement looping to make life easier lapply: Loop over a list and evaluate a function on each elementsapply: Same as lapply but try to ...
However, we do not aim to train readers fully in the R programming language (which is beyond the scope of this chapter). In particular, we plan to introduce the necessary commands as the need arises in the chapter. To begin, we outline the steps needed to install R: 1. Go to https:...
Now things get interesting — In this casethe environment in which a function is defined is the body of another function! make.power<- function(n) { pow <- function(x) { x^n } pow } This function returns another function asits value ...
R Programming Language At this point you should know how toapply the which function to matricesin R. Please tell me about it in the comments section, in case you have additional comments and/or questions. I’m Joachim Schork. On this website, I provide statistics tutorials as well as cod...