r apply dataframe
3. lapply 4. sapply 5. mapply 6. rapply 7. vapply 8. eapply. R 1. 文件 ... lapply 會對list 和data.frame 進行處理，回傳的方式將會是list 的型態。, dat <- data.frame(x=c(1,2), y=c(3,4), z=c(5,6)) apply(dat[,c('x','z')], 1, ..... The downside is that I believe R will make a copy of your data table.
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 r apply dataframe 相關參考資料
掌握R语言中的apply函数族| 粉丝日志
但是，由于在R语言中apply函数与其他语言循环体的处理思路是完全不一样的， ... 定义一个结果的数据框> df<-data.frame() # 定义for循环> for(i in ... http://blog.fens.me R 群組資料處理- apply | 龍崗山上的倉鼠
3. lapply 4. sapply 5. mapply 6. rapply 7. vapply 8. eapply. R 1. 文件 ... 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 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, ..... The downside is that I believe R will make a copy of your data table. https://stackoverflow.com 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 data.frame . Not a big deal though to get back to a data.frame . https://stackoverflow.com R apply function with 2 dataframe - Stack Overflow
We can use Map to apply the function mmetric on the corresponding columns mapply(function(x,y) mmetric(x,y, metric='MAE'), obs, pred) # aa oo dcl iy sh ... https://stackoverflow.com R, apply function on every second column of a data frame? - Stack ...
Similarly you can do this for row/columns of a matrix or dataframe. Here we use the apply function with the second argument 2 for cols (1 for cols). I recommend ... https://stackoverflow.com R tutorial on the Apply family of functions (article) - DataCamp
In this tutorial we show the use of apply in R, its variants, and a few of its ... to see the number of rows and columns that the dataframe contains, ... https://www.datacamp.com 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. https://redoakstrategic.com Using apply, sapply, lapply in R | R-bloggers
This is an introductory post about using apply, sapply and lapply, best ... As a commenter pointed out, if you are using a data frame the data ... https://www.r-bloggers.com Apply function for each Row in an R Data Frame - Tutorial Kart
R Tutorial - We shall learn how to apply a function for each Row in an R Data Frame with an example R Script using R apply function. https://www.tutorialkart.com |