如何輕鬆安全地在R中重塑我的數據？

Question

我經常使用「wide format」格式的數據爲同一個變量提供多個列（請參閱here），我希望以長格式輸入數據（請參閱here）。你有任何簡單和安全的解決方案？

Answer 1

當你的兩個例子不具有相同的數字，不知道這是否是你想要什麼：

data <- read.table(text='"id","name1","name2","x1","x2" 
1,"Mr a","Mr c","0.575710014459387","-0.991747242336918" 
2,"Mr b","Mr d","-0.126033858727122","0.854792650572792"', sep=',', header=TRUE) 

reshape(data, direction = 'long', idvar = 'id', varying = list(c('x1', 'x2'), c('name1', 'name2')), times=c('a', 'b')) 

Answer 2

或者與熔體功能UNPIVOT：

library(reshape2) 
data <- read.table(text='"id","name1","name2","x1","x2","Mr a","Mr c","0.575710014459387","-0.991747242336918","Mr b","Mr d","-0.126033858727122","0.854792650572792"', sep=',', header=TRUE) 
reshape(data, direction = 'long', idvar = 'id', varying = list(c('x1', 'x2'), c('name1', 'name2')), times=c('a', 'b')) 
melt(data,c("id","name1","name2"),variable.name="x",value.name="value")