[英]R - how do I run each function in a list of functions with parameters given by a vector
[英]How do I run functions within another function in R?
我看到了一个与此类似的问题,但是我没有完全理解答案。 这是我的原始功能:
fxn_import_data <- function(file_path, filen)
{work <-setwd(file_path)
yelp <- stream_in(file(filen)) #creating a data fram called yelp using stream_in function}
#head(yelp, 10)
yelp_flat<- flatten(yelp) #helps turn JSON files with multiple df's into tabular format
#str(yelp_flat) #displays abbreviated content (not needed for this data set)
scoop <- as_data_frame(yelp_flat)
}
此功能的目的是打开我的数据的文件源并解压缩它。 我需要这些数据来运行我的下一个功能,如下所示:
fxn_create_meta<- function(fxn_import_data, scoop) {return(scoop)
fxn_import_data <- function(file_path, filen)
scoop <- as_data_frame(yelp_flat)
scoop$homePlayers <- NULL #eliminates homePlayers column
scoop$awayPlayers <- NULL
pop <- scoop %>% separate(ball, c("ball_x", "ball_y", "ball_z"), sep = ",")
#separates one column into multiple
l <- pop %>% separate(ball_x, c("throw","ball_x"), sep = "c")
gh <- l %>% separate(ball_z, c("ball_z", "tra"), sep = "\\)")
Meta <- gh %>% separate(ball_x, c("kol", "ball_x"), sep = "\\(")
Meta$tra <- NULL
Meta$kol <- NULL
Meta$throw <- NULL
return(Meta)
}
但是,当我尝试运行第二个函数时,它告诉我对象“ scoop”未定义。 我该如何解决?
您可以编写两个函数,第二个函数在其中运行第一个函数:
fxn_import_data <- function(file_path, filen)
{work <-setwd(file_path)
yelp <- stream_in(file(filen))
yelp_flat<- flatten(yelp)
scoop <- as_data_frame(yelp_flat)
}
fxn_import_data <- function(file_path, filen){
scoop <- fxn_import_data(file_path, filen)#RUN THE FIRST FUNCTION AND SAVE THE RESULT AS scoop
scoop$homePlayers <- NULL
scoop$awayPlayers <- NULL
pop <- scoop %>% separate(ball, c("ball_x", "ball_y", "ball_z"), sep = ",") l <- pop %>% separate(ball_x, c("throw","ball_x"), sep = "c")
gh <- l %>% separate(ball_z, c("ball_z", "tra"), sep = "\\)")
Meta <- gh %>% separate(ball_x, c("kol", "ball_x"), sep = "\\(")
Meta$tra <- NULL
Meta$kol <- NULL
Meta$throw <- NULL
return(Meta)
}
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