關於 map_dbl(r package) ，我們在網路上蒐集到這些相關的討論、資訊與評價

#11. 36 Using the purrr package | R for Epidemiology

We used purr 's map_dbl() function to iteratively calculate the mean of each column in the df_xyz data frame. There are other map functions beside map_dbl() .

#12. 8 Functionals | Advanced R Solutions

map_dbl (mtcars, sd) #> mpg cyl disp hp drat wt qsec vs am gear #> 6.027 1.786 ... library(ggplot2) df_trials <- tibble::tibble(p_value = map_dbl(trials, ...

#13. R中的函数编程包purrr

最近需要用R做一些快速的试验，但是数据是时序化的，使用R进行ETL比较 ... n = 10) %>% map_dbl(mean) # Or use an anonymous function 1:10 ...

#14. Getting started with the purrr package in R - University of ...

For example, if we want a vector instead of a list we can use the map_dbl function. The “_dbl” indicates that it returns a vector of type double ...

#15. purrr

library (purrr) mtcars %>% split(.$cyl) %>% map(~ lm(mpg ~ wt, data = .)) %>% map(summary) %>% map_dbl("r.squared"). Note the three types of input to map() ...

#16. R for Data Science Chapter 17 - Amazon AWS

package <U+393C><U+3E31>tidyverse<U+393C><U+3E32> was built under R version ... Those summary functions returned doubles, so we need to use map_dbl():

#17. map() Function in R: How to Install Purrr Package - R-Lang

The purrr package improves the R's functional programming (FP) toolkit. ... The map_dbl() function returns a double vector.

#18. Apply Mapping Functions in Parallel using Futures • furrr

You can install the released version of furrr from CRAN with: ... reference page can be useful to get a general overview of the functions in the package, ...

#19. 16 Iteration, loops, and lists | The Epidemiologist R Handbook

The purrr package is the tidyverse approach to iterative operations - it works ... to produce character vectors, and map_dbl() to produce numeric vectors).

#20. purrr - METACRAN

purrr enhances R's functional programming (FP) toolkit by providing a complete ... returns lists; map_dbl() returns double vectors), or they throw an error.

#21. 3-Functional programming

​http://data.library.virginia.edu/getting-started-with-the-purrr-package-in-r/​. ​https://www.youtube.com/watch?v=A8UaL47UXYE​. #10-The map functions.

#22. Lecture 7: Functional-style programming in R — Data 531

Our series of R lectures will be presented by Dr. Tiffany Timbers, ... but for now, let's tour a simple R package to get a better understanding of what they ...

#23. purrr: Introduction and Application - Josh McCrain

This tutorial provides a brief introduction to the purrr package, ... familiar with the logic behind base R's apply family of packages, ...

#24. Extract slope and r squared from grouped linear models using ...

... map_dbl('r.squared'), slope = tidy %>% map_dbl(function(x) x$estimate[2])) ... library(tidyverse) library(broom) #read in the dataset ...

#25. R Packages for Data Analysis | STAT 545 @ UBC

Add a license Update an R package via semantic versioning, NEWS, ... it can take either a vector or list, using purrr's map_dbl() function.

#26. 社群媒體分析期末報告-從陸劇探討如何創造熱門話題 - RPubs

The following objects are masked from 'package:igraph': ## ## compose, ... perplex = map_dbl(drama_article_ldas, topicmodels::perplexity)) ...

#27. 21 Iteration | R for Data Science

... mastered the for loops provided by base R, you'll learn some of the powerful programming tools provided by purrr, one of the tidyverse core packages.

#28. purrr - Roshan Talimi

https://cran.r-project.org/web/packages/purrr/purrr.pdf ... function returns map list map_chr character vector map_dbl double (numeric) vector map_dfc data ...

#29. Lesser known purrr tricks | R-bloggers

purrr is a package that extends R's functional programming capabilities. It brings a lot of new stuff to the ... map_dbl(numbers, sqrt).

#30. Learn to purrr - Rebecca Barter

It's one of those packages that you might have heard of, ... introduces map functions (the tidyverse's answer to base R's apply functions, ...

#31. R語言中的purrr:map()函數 - 台部落

map_dbl ()，map2_dbl()，pmap_dbl(). 返回的是一個雙精度向量 library(purrr) fun=function(x){x+0.11} funxy=function(x,y){x-y+0.69} ...

#32. furrr r package Archives - Análise Macro

Graças ao esforço da comunidade de R já foram criados diversos pacotes que ... do pacote purrr do tidyverse para iterações no R. A função map_dbl() retorna ...

#33. purrr for biostatisticians - Daniel D. Sjoberg

purrr package. purrr enhances R's functional programming ... other purrr package functions ... tidyr::nest + dplyr::mutate + purrr::map_dbl. trial %>%.

#34. Functional programming - biostat2

purrr enhances R's functional programming toolkit by providing a complete and ... apply() family still useful to avoid dependencies (package development) ...

#35. Functional Programming in R with purrr | by Thomas Mock

Eventually you hopefully get exposed to the tidyverse , and you find how this “ opinionated collection of R packages designed for data ...

#36. Itération de fonctions avec purrr - R-atique

purrr, c'est un package du tidyverse (qui compte d'autres ... moyennes=map_dbl(x,mean,na.rm=TRUE) print(moyennes) ## [1] 33 NaN 2 15 7 4 5.

#37. {purrr} beyond map(): my talk at satRday Joburg 2020

Of all the R packages I have used, {purrr} has had the single most transformative ... try to convert each element to integer using map_dbl.

#38. 3 Efficient programming - Bookdown

The purrr package has some type consistent alternatives to base R functions. For example, map_dbl() etc. to replace Map() and flatten_df() to replace unlist() .

#39. here are some needed R packages # (if you get an - Chegg

here are some needed R packages # (if you get an error loading a package, install it first using the function install.packages) library(gapminder)

#40. Functional Programming / purrr package - 블로그 - 네이버

map_dbl () returns a double vector. # map_chr() returns a character vector. library(purrr). map_dbl(df, mean). map_dbl(df, quantile, probs ...

#41. Purrr and map: an introduction - R, it's OK I guess

Then, the map_dbl line says “for each of the things in x , run the function double_it on that thing”. The idea is not that you would actually ...

#42. Tidyverse split-apply-combine example

Here we use spread() from the tidyr package. ... The map() function from purrr returns a list, while the map_dbl() function returns a vector ...

#43. R中的函式程式設計包purrr - ITW01

最近需要用R做一些快速的試驗，但是資料是時序化的，使用R進行ETL比較麻煩（ ... n = 10) %>% map_dbl(mean) # Or use an anonymous function 1:10 ...

#44. 在R 中查詢向量的模式 - Delft Stack

R Stat. 創建時間: July-14, 2021. 使用自定義函式查詢R 向量的眾數; 使用 map_dbl 將 FindMode 函式應用於R 中的每個資料框列. 本文將解釋如何在R 中找到向量的眾數的 ...

#45. To purrr or not to purrr - Mango Solutions

The purrr package, which forms part of the tidyverse ecosystem of packages, further enhances the functional programming aspect of R. It ...

#46. What Are the Tidyverse Packages in R Language?

Tidyverse Packages in R. There are eight core Tidyverse packages namely ggplot2, dplyr, tidyr, readr, purrr, tibble, stringr, and forcats that ...

#47. Purrr tutorial - Sander Wuyts

Purrr is one of those tidyverse packages that you keep hearing about, ... Map linear model into summary function to get r squared r2 = map_dbl(model, ...

#48. Futures and furrr - Duke Statistical Science

The future package provides a simple way to evaluate R expressions ... Compare the performance of doing this with map_dbl() and future_map_dbl() .

#49. The Magic of Purrr | C. Lente

Have you ever heard about an R package called purrr ? ... But map() has many sister functions, map_xxx() ( map_dbl() , map_chr() , map_lgl() ...

#50. Compute/Visualize Drive Space Consumption of Your ...

Compute/Visualize Drive Space Consumption of Your Installed R Packages ... select(pkg_dir) %>% mutate(pkg_dir_size = map_dbl(pkg_dir, ...

#51. Easy error handling in R with purrr's possibly | InfoWorld

See how the purrr package's possibly() function helps you flag errors and keep going when applying a function over multiple objects in R.

#52. R Data Science Quick Reference - Passei Direto

Veja grátis o arquivo R Data Science Quick Reference enviado para a disciplina ... 118, 120 filter() function, 117 Forcats package (see Factors) force_tz() ...

#53. A Guide to the Tidyverse – Purrr - People, Networks, Data ...

Quick notes on handy tools for R . ... one for each common type of output: map_lgl() , map_int() , map_dbl() , map_chr() , and map_df() .

#54. Going Off the Map: Exploring purrr's Other Functions - Hooked ...

purrr is a package for functional programming in R. If you're familiar with it, it's probably because of ... map_dbl(my_vector, ~ .x + 10)

#55. One Stop Tutorial On purrr Package In R | R Statistics Blog

Installing purrr package. The purr package can be downloaded using three different methods. As it is part of tidyverse package in R. I guess the ...

#56. How to get help with R package development? R-package ...

We hope to build a community of R package developers who can help each ... lbound = bound + lfact, iterations = purrr::map_dbl(topic_model, ...

#57. Lecture note on purr

We could do that using the shorthand for anonymous functions: models %>% map(summary) %>% map_dbl(~.$r.squared)

#58. R系列之map函数家族

map(.x, .f, ...) ：返回值为列表; map_lgl() 、 map_int() 、 map_dbl() 、 map_chr() ：返回特定数据类型的向量，在使用 ...

#59. What is Tidyverse | Tidyverse Package in R - Analytics Vidhya

Tidyverse is the most powerful collection of R packages. Learn about the tidyverse package in R and how each package works and get the full ...

#60. Chuleta de purrr - enRdados

esta es la forma mas sencilla install.packages("tidyverse") # AComo ... map_int() salida como vector de enteros. map_dbl() número doble.

#61. An introduction to R using the tidyverse

The tidyverse is a set of R packages that try to make your life easier when working with ... Here we use map_dbl, to ensure that we get a double value back.

#62. 7 Levels of Data Manipulation with the tidyverse: Part 2

The purrr package expands on R's natural strength in functional ... Because we used map_dbl() as opposed to map() , it forced the row_count ...

#63. Apply a function to each element of a list or atomic vector

Source: R/map.R. map.Rd ... map_lgl() , map_int() , map_dbl() and map_chr() return an atomic vector of the indicated type (or die trying).

#64. Advent of Code 2021-01 with R & JavaScript - Colin Fay

I'll try in this post to write R code that looks like the ... thanks to the {bubble} package:https://github.com/ColinFay/bubbleInstructions ...

#65. master · Stéphane Guillou / DSH - GitLab

Double click on RStudio, which will install both R and RStudio. With RStudio open, let's make sure we have the necessary packages installed by ...

#66. Piping with Purrr - Nate Day

Piping %>% in R has been around since the debut of library(magrittr) in 2014 ... Other helper functions like map_chr , map_lgl and map_dbl are similar to ...

#67. R语言中的purrr:map()函数_辉的博客

map_dbl ()，map2_dbl()，pmap_dbl(). 返回的是一个双精度向量 library(purrr) fun=function(x){x+0.11} funxy=function(x,y){x-y+0.69} ...

#68. Principles of Tidy Data | Applied R Code

library (magrittr). library(dplyr) ... of functions in base R and the various map() functions in the purrr package are the core tools for this purpose.

#69. Iteratively applying models - machinegurning.com

One thing I particularly like so far is the purrr package which he describes in the ... b = coef(fit)[[2]], R2 = summary(fit)$r.squared, ...

#70. 2 A tidyverse primer | Tidy Modeling with R

The tidyverse is a collection of R packages for data analysis that are developed with common ... map_dbl(head(mtcars$mpg, 3), sqrt) #> [1] 4.583 4.583 4.775.

#71. Chapter 3 Wrangling Data in the Tidyverse

1 R Packages. While there are tons of R packages out there to help you work with data, we're going to cover the packages and functions within those ...

#72. Package 'purrr'

Package 'purrr'. October 18, 2017 ... R topics documented: ... map_lgl() a logical vector, map_int() an integer vector, map_dbl() a double.

#73. Easy way to make a codebook in R - Alexandru Cernat

R is one of the most popular packages in the social and data sciences. ... a string vector while map_dbl() creates a numeric vector.

#74. Functional Progamming in R with purrr - The Mockup Blog

Eventually you hopefully get exposed to the tidyverse, and you find how this “opinionated collection of R packages designed for data ...

#75. Lesser known purrr tricks - Econometrics and Free Software

purrr is a package that extends R's functional programming ... library(purrr) numbers <- list(11, 12, 13, 14) map_dbl(numbers, sqrt)

#76. converting map_dbl output to tibble in R tidyverse - py4u

converting map_dbl output to tibble in R tidyverse ... nrow=5)) library(dplyr) library(purrr) library(tibble) library(tidyr) # capturing all the data frames ...

#77. Hypurrr-ameter Grid Search with Purrr and Future

Pre-knowledge: Beginner to Moderate R; introductory modeling ... The very next line after the model is fit, we use map_dbl() to apply a root ...

#78. 9 Basic map functions

Fortunately, we can use functions from the purrr package to iterate through ... (All diagrams were adapted from https://adv-r.hadley.nz/functionals.html.).

#79. `dtplyr` and `tidyfast` are teaming up (well, at least in this blog ...

The dtplyr package actually only has one function: lazy_dt() . ... in each movie and return a double vector (using map_dbl() ) and get the ...

#80. September | 2015 | RStudio Blog

Purrr is a new package that fills in the missing pieces in R's ... map(summary) %>% map_dbl("r.squared") #> 4 6 8 #> 0.509 0.465 0.423.

#81. Map in r

More recently, with the advent of packages like sp, rgdal, and rgeos, R has been ... map_int() , map_dbl() and map_chr() return vectors of the corresponding ...

#82. 【R语言】优雅的循环迭代：purrr包 - 知乎专栏

用R 写循环从低到高有三种境界：手动for 循环，apply 函数族，purrr 包泛函式编程。 ... df$model %>% map(summary) %>% map_dbl("r.squared") # 用列表的元素名做 map ...

#83. purrr for analysis in R - Scott Olesen

library (tidyverse) library(ggplot2) iris %>% ggplot(aes(x = Sepal. ... In base R it is relatively straightforward to extract the slope m m ...

#84. purrr包你知道多少？ - iFuun

今天要和大家分享的是R語言數據處理的一個高級函數編程語言purrr包，該包 ... 覺得很麻煩，這時可以想到map()函數，可以使用map函數中的map_dbl():.

#85. Mean of dbl in r

More details can be found in the documentation of the GenVector package. ... Mean of a column in R can be calculated by using mean() function. map_dbl (-2: ...

#86. R语言：Purrr包探索 - 简书

library (purrr) map(2:3, samebirth) ## [1] 0.002739726 ## [1] ... 结果输出会很长，这是可以将 map 函数改为 map_dbl ，指定输出数值型的结果：.

#87. Elegante R-Programmierung mit purrr::map und genisteten ...

Hier verwenden wir map_dbl, um sicherzustellen, dass wir numerische Werte (mit Dezimalstellen) zurückerhalten. Ganze Modelle im Datensatz ...

#88. Practical R for Mass Communication and Journalism

Bob Rudis created an R package for Geocodio at https: ... data from the response_results list column using purrr's map_dbl() function (to create a vector of ...

#89. Extending Power BI with Python and R: Ingest, transform, ...

From the geosphere package, you will use the distHaversine() and distGeo() ... map_dbl(p1, ~ distHaversine(p1 p2 = jfk_coordinates, r = 6371008.771415)), ...

#90. R for Data Science: Import, Tidy, Transform, Visualize, and ...

... and saving the results is so common that the purrr package provides a family of functions to do it for you. ... map_dbl() makes a double vector.

#91. Modern Data Science with R - 第 143 頁 - Google 圖書結果

This is the main function from the purrr package. ... Teams %>% select(15:40) %>% map_dbl(mean, na.rm = TRUE) R AB H X3B HR BB SO X2B 229.707 684.623 ...

#92. R for Political Data Science: A Practical Guide - Google 圖書結果

16.4 Mapping in R Maps have been historically the main technique for ... We can do this with the map() and map_dbl() commands, from the purrr package, ...

#93. R Cookbook: Proven Recipes for Data Analysis, Statistics, ...

It's annoying when R is that cautious, but it is appropriate. ... na.rm=TRUE,. which tells R to ignore the ... package. As with other tidyverse packages, ...

#94. Alternative to for loops in R with purrr's map, map_dbl, and ...

In this screencast tutorial, Pat Schloss shows how to use the map, map_dbl, and map_dfr functions from the purrr R package to replace your for loops.