關於 apply r ，我們在網路上蒐集到這些相關的討論、資訊與評價

#11. R tutorial on the Apply family of functions - DataCamp

How To Use apply() in R · X is an array or a matrix if the dimension of the array is 2; · MARGIN is a variable defining how the function is applied: when MARGIN=1 ...

#12. [R]高級結構指令(lapply, sapply和apply)的用法 - CSDN博客

[R]高級結構指令(lapply, sapply和apply)的用法 · #data · data1<-list(num=c(1:5), name=c(10,20,30),mat=matrix(1:15,nrow = 3,ncol = 5)) · #result · cal1 ...

#13. R語言apply()用法及代碼示例- 純淨天空

R program to illustrate # apply() function # Creating a matrix A = matrix(1:9, 3, 3) print(A) # Applying apply() over row of matrix # Here margin 1 is for ...

#14. R軟體apply系列基本函數的運用 - 統計、分析、運算- 痞客邦

... 然而R 程式中卻不可用太多的迴圈，否則會大大降低程式執行的效率！以紐約市空氣品質資料為例，其為包含六個變數的154 筆資料，以apply 函數可以輕易.

#15. R语言学习笔记（四）：apply，sapply，lapply，tapply - 博客园

apply () apply（m，dimcode，f，fargs） m 是一个矩阵。 dimcode是维度编号，取1则为对行应用函数，取2则为对列运用函数。 f是函数fargs是f的可选参数 ...

#16. R系列之apply函数家族

这篇文章学习了R中常用的apply函数家族，主要包括apply(对矩阵、数据框和数组进行行列的操作)、lapply(作用于列表和数据框，对列表中的每个元素进行 ...

#17. R apply家族函數 - 統計與R

因為R內建的函數都是經過編譯的，所以執行的效率會比自己寫迴圈還好。 apply(array, margin, function, ...) 將矩陣依據行或列把所有的元素代入運算

#18. APPLY in R with apply() function [with EXAMPLES] - R Coder

The apply command in R allows you to apply a function across an array, matrix or data frame. You can do this in several ways, depending on the value you specify ...

#19. Chapter 4: apply Functions - A Language, not a Letter ...

Apply functions are a family of functions in base R which allow you to repetitively perform an action on multiple chunks of data. An apply function is ...

#20. 「R」apply,lapply,sapply用法探索- 云+社区 - 腾讯云

apply 函数族是R语言中数据处理的一组核心函数，通过使用apply函数，我们可以实现对数据的循环、分组、过滤、类型控制等操作。但是，由于在R语言 ...

#21. apply family in r apply(), lapply(), sapply(), mapply() and tapply()

The apply family is an inbuilt R package, so no need to install any packages for the execution. The main advantage of apply function is we can ...

#22. lapply: Apply a Function over a List or Vector - Rdrr.io

apply , tapply , mapply for applying a function to multiple arguments, ... dump: Text Representations of R Objects duplicated: Determine Duplicate Elements ...

#23. apply Functions in R (6 Examples) | lapply, sapply, vapply ...

How to use the family of different apply functions in R - 6 R programming examples - Comprehensive instructions - Complete syntax in RStudio.

#24. Apply Functions Over Array Margins - R

Returns a vector or array or list of values obtained by applying a function to margins of an array or matrix. Usage. apply(X, MARGIN, FUN, ..., simplify = TRUE) ...

#25. Apply - Spatial Data Science with R

Apply ¶. The “apply family” of functions ( apply , tapply , lapply and others) and related functions such as aggregate are central to using R. They provide ...

#26. Data Frames and Apply - CMU Statistics

Data frames. The format for the “classic” data table in statistics: data frame. Lots of the “really-statistical” parts of the R programming ...

#27. R: apply-like function that returns a data frame? - Stack Overflow

You can use the apply family but, you're right, the result is either a matrix or a list . Not a big deal though to get back to a data.frame .

#28. Matrix Function in R - Master the apply() and sapply ...

R matrix function tutorial covers matrix functions in R; apply function and sapply function with uses and examples to understand the concept thoroughly.

#29. Apply function to every value in R dataframe - GeeksforGeeks

In R Programming Language to apply a function to every integer type value in a data frame, we can use lapply function from dplyr package. And if ...

#30. apply vs lapply vs sapply vs mapply vs tapply vs rapply vs vapply

Apply function in R: The family comprises: apply, lapply , sapply, vapply, mapply, rapply, and tapply. The Family of Apply functions pertains to the R base.

#31. Package future.apply - CRAN

These future_*apply() functions come with the same pros and cons as the corresponding base-R *apply() functions but with the additional ...

#32. The Ultimate Swiss Army Knife of apply Family in R - Analytics ...

Apply functions are most widely used for transforming data in R. Lets use R and learn about the various set of apply functions.

#33. R语言中的apply()，lapply()，sapply()，tapply()函数以及示例

如果将R与Anaconda一起安装，则apply（）集合与R基本软件包捆绑在一起。apply（）函数可以提供许多函数，以对对象（数据框，列表，向量等）的集合执行冗余 ...

#34. 24. apply() ファミリー - affrc

一つの関数を複数のオブジェクトに適用して得られた結果をベクトルや行列，リストとして一括で返す．例えば m × n 行列 X の全ての要素に 1 を足す場合，R では繰り返し文 ...

#35. apply() Function in R with Example - R-Lang

The apply() in R function returns a vector or array or list of values attained by applying a function to the margins of a matrix or an ...

#36. plyr : apply - R Note

R 迴圈的效能不好，因此用PLYR中的APPLY家族取代循環計算，APPLY的函數們主要 ... lapply: Apply a Function over a List or Vector (用於LIST和向量or ...

#37. Apply - Randolph-Macon College

Applying to Randolph-Macon is convenient...and free! There are two ways to apply: through the Common Application or through R-MC's Application.

#38. The Apply Family of Functions

R is bad at looping. A more vectorized way to do this is to use the apply() function. In this example, apply extracts each column as a vector, ...

#39. R apply家族函数详解

因为向量在R中在底层用C语言优化过，运行更快，性能更好，在使用R时，要尽量用array的方式思考，避免for、while循环语句，特别是数据量大的时候。 apply函数族是R语言中 ...

#40. Dealing with Apply functions in R | by vikashraj luhaniwal

Apply functions in R. Iterative control structures (loops like for, while, repeat, etc.) allow repetition of instructions for several numbers of times.

#41. R語言向量化運算：apply函數族用法心得 - 每日頭條

至於R寫循環為什麼執行效率低下，小編也從技術論壇上得到了一些解釋。說是像for和while之類的循環語句是基於R本身來實現的，而apply函數族的向量化運算是 ...

#42. How to Apply Functions on Rows and Columns in R - dummies

In R, you can use the apply() function to apply a function over every row or column of a matrix or data frame. This presents some very handy opportunities.

#43. Apply a Function over a List or Vector - R

Apply a Function over a List or Vector. Description. lapply returns a list of the same length as X , each element of which is the result of applying FUN to ...

#44. split-apply-combine strategy in R: R 的分進合擊 - Maxkit

split-apply-combine SAC strategy 是R 語言在處理大量資料的策略，有人直接翻譯成「拆開-套用-整合」，有人翻譯成「化整為零」，我有另一個更貼切的 ...

#45. R语言apply系列介绍

apply 函数有3个参数：a. 第一个为输入的数据，要求为矩阵或者数据框的形式b. 第二个参数指的是按行还是按列来进行计算，为1时是按行进行计算， ...

#46. How to Apply - Application Guide - NIH OER

How to Apply - Application Guide. Use the application instructions found ... R. Research Instructions, Guidance for research only, PDF · PDF.

#47. 在R 中應用多引數函式 - Delft Stack

R Function. 創建時間: January-22, 2021. 在任何程式語言中，函式都是必不可少的。函式是一個程式碼塊，它可以被呼叫來執行程式設計中的特定操作。 在R 中，我們有內 ...

#48. r 語言apply

管理. R語言apply()函數用法. 在R語言的幫助文檔里，apply函數的功能是：. Retruns a vector or array or list of values obtained by applying a function to margins ...

#49. Apply an R Function in Spark — spark_apply • sparklyr

Applies an R function to a Spark object (typically, a Spark DataFrame). spark_apply( x, f, columns = NULL, memory = TRUE ...

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#51. The Apply Family of Functions in R | Analytics Steps

The apply() Function in R Programming. The apply function helps us to apply a function on rows or columns (margins) of a matrix or a data frame.

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#54. Apply Function to Elements in Parallel using Futures - GitHub

Introduction. The purpose of this package is to provide worry-free parallel alternatives to base-R "apply" functions, e.g. apply() , ...

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#56. Syntax 2: R's transform() function - 4 data wrangling tasks in R ...

dataFrame$newColumn <- apply(dataFrame, 1, function(x) { . . . } ) The line of code above will create a new column called "newColumn" in the data frame; the ...

#57. R apply functions - Amazon AWS

R apply functions · row and column functions: rowSums, colSums, rowMeans, colMeans · apply family: apply, lapply, sapply, vapply, mapply, rapply, and tapply ...

#58. 如何使用pandas 的apply？Dataframe 加入新Column？Python ...

output = r['column1'] + r['column2']. return output. # 以apply_fx 建立新的列（Column）. df['column3'] = df.apply(apply_fx, axis=1).

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#60. [R][翻譯] apply、sapply、lapply之區別

R 和一般程式語言或統計軟體的不同在於進行迴圈運算時，可以使用向量的方式來處理，也就是本文主要要介紹的apply、sapply和lapply。

#61. Apply a function to each group — group_map • dplyr

Apply a function to each group. Source: R/group_map.R. group_map.Rd ... A function or formula to apply to each group. If a function, it is used as is.

#62. Function (Java Platform SE 8 ) - Oracle Help Center

Interface Function<T,R> ... Represents a function that accepts one argument and produces a result. This is a functional interface whose functional method is apply ...

#63. Understanding apply(), lapply(), sapply(), tapply() Functions in ...

The name R is given to the programming language based on Ross and Robert's names. As the R programming language is ...

#64. R語言中apply/ sapply/ lapply 用法 - MiluQ

今天要介紹R 裡面的apply/ sapply/ lapply 等系列函數提供了另一種方式，真要說一句形容的話，那就像是用樂高蓋大樓的感覺，搭配 magritt package ...

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#66. R : Apply Function on Rows - ListenData

R : Apply Function on Rows. This tutorial explains how to apply functions on rows. Sample Data.

#67. Functionals - Advanced R.

The chances are that you've already used a functional: the three most frequently used are lapply() , apply() , and tapply() . All three take a function as ...

#68. How To: Apply Family of R Functions - Red Oak Strategic

The apply function in R is used as a fast and simple alternative to loops. It allows users to apply a function to a vector or data frame.

#69. R語言中的apply函數族 - 人人焦點

apply 函數族是R語言中數據處理的一組核心函數，通過使用apply函數，我們可以實現對數據的循環、分組、過濾、類型控制等操作。但是，由於在R語言 ...

#70. 关于r：分组函数(tapply，by，aggregate)和* apply系列| 码农家园

Grouping functions (tapply, by, aggregate) and the *apply family每当我想在R中做mappy时，我通常会尝试在apply系列中使用一个函数。

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Temporary religious worker (R-1) visas are for persons who want to enter the ... Your spouse and unmarried children under age 21 may apply for R-2 visas to ...

#72. apply() or sapply()

apply () function: ... apply(variablename,2,mean) #calculates the mean value of each column in the data frame ... Note how you can nest functions in R.

#73. R: Apply a Function over a List or Vector - MIT

sapply is a user-friendly version and wrapper of lapply by default returning a vector, matrix or, if simplify = "array" , an array if appropriate, by applying ...

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High-density lipoproteins (HDL) are key players in cholesterol metabolism homeostasis since they are responsible for transporting excess cholesterol from ...

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#76. R数据分析：apply()的各种变体你分清了吗？ - 51CTO博客

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。

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#79. Functions in R - apply(), mapply(), tapply(), lapply()

new blog Functions in R We are going to introduce some basic functions which can help us to work easily in day-to-day work. apply() The ...

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#81. Apply Functions in R and Python - Water Programming: A ...

Then, I will briefly go over anonymous functions in Python. The Apply Function in R. The apply function is used to manipulate data frames, ...

#82. Using the apply family of Functions in R | DataScience+

apply. apply can be used to apply a function to a matrix. For example, let's create a sample dataset: data <- ...

#83. The apply(), sapply(), lapply() and tapply() Functions in R ...

The family of apply() functions in R is used to apply user-defined functions to the elements of complex structures like matrices, lists or data frames.

#84. 30 天学会R DAY 13：apply族函数：用来批量作业的函数

R 语言中，apply族函数是非常重要的函数，它在很多场景下，可以代替循环语句，简化程序写作过程，实现高效的统计分析，因此我们称之为批量处理函数。

#85. DevOps R - Apply Data Science

This course will teach you how to provide a Server with any R service: RStudio Server, Shiny Server (free or Pro version), Shiny Proxy (the Open Source ...

#86. R: Apply a Function over a List or Vector - UCLA Math

lapply {base}, R Documentation. Apply a Function over a List or Vector. Description. lapply returns a list of the same length as X . Each element of which ...

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Information and details about how to apply to the Pickering Fellowship. The application deadline for the 2022 Thomas R. Pickering Foreign Affairs Fellowship ...

#88. Chapter 2 Vectorization, *apply and for loops - Sahir Bhatnagar

This section will cover the basics of vectorizations, the *apply family of functions and for loops. 2.1 Vectorization. Almost everything in R is a vector. A ...

#89. Kotlin 的scope function: apply, let, run..等等 - 只放拖鞋的鞋櫃

第一個定義的 run 用了泛型，定義它的回傳值是 。 run 接受了一個叫做block 的lambda，lambda 的型別是執行之後會回傳R，所以 run 的實作就是 ...

#90. A Guide to apply(), lapply(), sapply(), and tapply() in R

This tutorial explains the differences between the built-in R functions apply(), sapply(), lapply(), and tapply() along with examples of how ...

#91. R: Reduce() – apply's lesser known brother - ZHAW Blog

apply () applies a function on one of the dimensions of a matrix or array and returns a vector, matrix or array. These are very useful, but they ...

#92. The Apply Functions in R. This is a somewhat detailed…

The second argument is list(dat$Grazing). This tells R to take the category values in the Grazing column of dat dataset (a factor variable ...

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#94. applyで、データフレームの行ごとの計算 - Rプログラム ...

R では、for ループを使わずに多量データの一括処理をシンプルに書ける apply 系の関数というものが用意されています。 apply のほか、tapply, lapply, ...

#95. [R] 效能(1) apply和他的快樂朋友們 - 宅男路上

在R的世界裡，for迴圈是幾乎所以R programmer都要盡量避免的，因為for迴圈真的很容易拖慢速度！ apply系列的函數可以把運算向量化(vectorization)，讓 ...

#96. 阿雷边学边教R语言第7期—apply家族函数 - BiliBili

#97. apply(), lapply(), sapply() and tapply() Functions in R

The apply() function is used to apply a function to the rows or columns of matrices or data frames. It assembles the returned values into a vector, and then ...

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