Dataframe apply R
apply() takes Data frame or matrix as an input and gives output in vector, list or array. apply() Function is primarily used to avoid explicit uses of ...,dat <- data.frame(x=c(1,2), y=c(3,4), z=c(5,6)) apply(dat[,c('x','z')], 1, function(x) sum(x) ) ... The downside is that I believe R will make a copy of your data table.
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 Dataframe apply R 相關參考資料
apply function to every element in data.frame and return data ...
frame · r dataframe element apply. UPDATE: before, I used the paste function as an example instead of an arbitrary ... https://stackoverflow.com apply(), lapply(), sapply(), tapply() Function in R with ... - Guru99
apply() takes Data frame or matrix as an input and gives output in vector, list or array. apply() Function is primarily used to avoid explicit uses of ... https://www.guru99.com Call apply-like function on each row of dataframe with multiple ...
dat <- data.frame(x=c(1,2), y=c(3,4), z=c(5,6)) apply(dat[,c('x','z')], 1, function(x) sum(x) ) ... The downside is that I believe R will make a copy of your data table. https://stackoverflow.com Dealing with Apply functions in R - Towards Data Science
Apply family in R. Apply family contains various flavored functions which are applicable to different data structures like list, matrix, array, data ... https://towardsdatascience.com How To: Apply Family of R Functions - Red Oak Strategic
https://redoakstrategic.com R tutorial on the Apply family of functions - DataCamp
In this tutorial we show the use of apply in R, its variants, and a few of its ... of data from matrices, arrays, lists and dataframes in a repetitive way. https://www.datacamp.com R 群組資料處理- apply - 龍崗山上的倉鼠
4. sapply 5. mapply 6. rapply 7. vapply 8. eapply. R 1. 文件. 2. apply ... lapply 會對list 和data.frame 進行處理，回傳的方式將會是list 的型態。 https://kanchengzxdfgcv.blogsp The Apply Family of Functions - Faculty
If your function returns a vector of constant length, R will stick the vectors ... It will work on the rows of a data frame, too, but remember: apply extracts each row as ... https://faculty.nps.edu Using apply, sapply, lapply in R | R-bloggers
As a commenter pointed out, if you are using a data frame the data types must all be the same otherwise they will be subjected to type conversion. https://www.r-bloggers.com 掌握R语言中的apply函数族| 粉丝日志
下面计算一个稍微复杂点的例子，按行循环，让数据框的x1列加1，并计算出x1,x2列的均值。 # 生成data.frame > x <- cbind(x1 = 3, x2 = c(4:1, 2:5)); x ... http://blog.fens.me |