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对于以下样本数据集功能之间:错误位置必须是0,且n在该过滤器和求和由日期范围
set.seed(123)
library(dplyr)
Sessions <- ceiling(rnorm(50, mean = 3000, sd = 300))
Registrations <- ceiling(rnorm(50, mean = 800, sd = 100))
Conversions <- ceiling(rnorm(50, mean = 400, sd = 50))
Date_Range = seq(Sys.Date() - 50, Sys.Date() - 1, by = 1)
sample_data <- data.frame(Date_Range,Sessions, Registrations, Conversions)
sample_data <- tbl_df(sample_data)
我已经对于给定的度量,其是为了提供总和的以下函数日期范围:
sumByDates <- function(startDate, endDate, metric) {
sum(filter(sample_data, Date_Range >= startDate & Date_Range <= endDate) %>% select(metric))
}
现在,如果我这样做:
sumByDates(Sys.Date()-5, Sys.Date()-1, Sessions)
我会得到:
Error: Position must be between 0 and n
Called from: combine_vars(vars, ind_list)
Browse[1]> Q
如何在给定Date_Range
的sample_data
中给定指标的总和?