1 stands for row, 2 stands for column... In the example above, we collapse the 3rd dimension (there would be no 3rd dimension in the result), and maintain the 1st and 2nd dimension (row & column)
In this case, start with understanding basic programming concepts, such as data structures (matrices, data frames, indexing these),forloops and functions in R. The online version of Garrett Grolemund'sHands-On Programming with Rwalks you through these concepts nicely. ...
is.data.frame & as.data.frame Functions in R Apply Function to Each Cell of Data Frame in R Change Classes of Data Frame Columns Automatically Replace Entire Data Frame Column in R Built-in R Commands (+ Examples) All R Programming Tutorials ...
apply函数可以看作是循环的替代方法，在R语言中，apply函数的变体有很多，好多时候同学搞不清到底该用apply呢，还是tapply呢还是sapply呢。今天就给大家系统地写一写。The apply() function can be feed with many functions to perform redundant application on a collection of object (data frame, list, vector,...
apply函数可以看作是循环的替代方法,在R语言中,apply函数的变体有很多,好多时候同学搞不清到底该用apply呢,还是tapply呢还是sapply呢。今天就给大家系统地写一写。 The apply() function can be feed with many functions to perform redundant application on a collection of object (data frame, list,vector, et...
R实现 sapply() 函数 R实现 tapply() 函数 R实现 apply(), lapply(), sapply(), and tapply() in R 在本文中,我们将了解R 编程语言中的 apply()、lapply()、sapply() 和 tapply() 函数。 apply() 集合是 R 基本包的一部分。这一系列函数帮助我们将某个函数应用于某个dataframe、列表或向量,并根据我...
The Apply Family of FunctionsIf one has to debate on a few powerful features of R programming, the apply family of functions, would find a mention. It is used commonly to avoid using looping structures such as for and while even though they are available in R....
apply函数可以看作是循环的替代方法,在R语言中,apply函数的变体有很多,好多时候同学搞不清到底该用apply呢,还是tapply呢还是sapply呢。今天就给大家系统地写一写。 The apply() function can be feed with many functions to perform redundant application on a collection of object (data frame, list, vector, ...
These Functions are discussed below. Table wise Function Application: pipe() Row or Column Wise Function Application: apply() Element wise Function Application: applymap() Table wise Function Application: pipe() Pipe() function performs the custom operation for the entire dataframe. In below ...
The previous R code returned each vector index position of elements that are either equal to 4 or equal to 1. We were able to return this result by using the |-operator.Example 3: Count Occurrences Using which & length FunctionsIn this Example, I’ll show how to use the which function...