[英]How to transfer data from wide format to long format in Excel Or SQL?
[英]How to reshape/recast data in Excel from wide- to long-format
有一个简单的R脚本将对此有所帮助。 该函数接受csv文件的路径以及标头变量的数量。 在我提供的示例图像/数据中,有7个标头变量。 也就是说,实际数据(T9_est1)从第8列开始。
# Use the command below if you do not have the tidyverse package installed.
# install.packages("tidyverse")
library(tidyverse)
read_data_long <- function(path_to_csv, header_vars) {
data_table <- read_csv(path_to_csv)
fields_to_melt <- names(data_table[,as.numeric(header_vars+1):ncol(data_table)])
melted <- gather(data_table, fields_to_melt, key = 'variable', value = 'values')
return(melted)
}
# Change the file path to where your data is and where you want it written to.
# Also change "7" to the number of header variables your data has.
melted_data <- read_data_long("path_to_input_file.csv", 7)
write_csv(melted_data, "new_path_to_melted_file.csv")
(更新了7/25/18,提供了一种更为优雅的解决方案;再次更新了9/28/18,并进行了少许改动。)
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