我正在尝试创建一个将列表作为输入并返回汇总数据框的函数。但是,在尝试了多种方法后,我无法将列表传递给聚合函数。
到目前为止,我有以下内容,但它失败了。
library(dplyr)
random_df <- data.frame(
region = c("A", "B", "C", "C"),
number_of_reports = c(1, 3, 2, 1),
report_MV = c(12, 33, 22, 12)
)
output_graph <- function(input) {
print(input$arguments)
DF <- input$DF
group_by <- input$group_by
args <- input$arguments
flow <- ddply(DF, group_by, summarize, args)
return(flow)
}
graph_functions <- list(
DF = random_df,
group_by = .(region),
arguments = .(Reports = sum(number_of_reports),
MV_Reports = sum(report_MV))
)
output_graph(graph_functions)
这工作的地方:
library(dplyr)
random_df <- data.frame(
region = c("A", "B", "C", "C"),
number_of_reports = c(1, 3, 2, 1),
report_MV = c(12, 33, 22, 12)
)
output_graph <- function(input) {
print(input$arguments)
DF <- input$DF
group_by <- input$group_by
args <- input$arguments
flow <- ddply(
DF,
group_by,
summarize,
Reports = sum(number_of_reports),
MV_Reports = sum(report_MV)
)
return(flow)
}
graph_functions <- list(
DF = random_df,
group_by = .(region),
arguments = .(Reports = sum(number_of_reports),
MV_Reports = sum(report_MV))
)
output_graph(graph_functions)
有人会知道将函数列表传递给的方法ddply
吗?或者另一种方法来实现聚合一组动态变量的相同目标。