R打印到CSV子集化“枢轴”表 [英] R printing to CSV subsetted 'pivot' tables
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问题描述
我试图write.csv大量的数据透视表样式表(如下表b):
进口商< - c(法国,西班牙,德国,法国,西班牙,法国,法国,法国,德国)
出口商 - c(秘鲁,巴西,阿根廷,智利,智利,秘鲁,秘鲁,巴西,巴西)
货物< ,Wine,Wine,Cars,Bananas,Bananas,Cars,Bananas,Wine)
df< -data.frame(import,exporter,货物)
table_a< - table(df $ importer,df $ exporter)
write.csv(table_a,table_a.csv)
table_b < df $ exporter,df $ goods)
write.csv(table_b,table_b.csv)
但CSV输出采用平面格式
以下是您以计数形式保留数据而不是首先计算行百分比。
I'm trying to write.csv a large number of pivot style tables (as per table b) below:
importer <- c("France", "Spain", "Germany", "France", "Spain", "France", "France", "France", "Germany")
exporter <- c("Peru", "Brazil", "Argentina", "Chile", "Chile", "Peru", "Peru", "Brazil", "Brazil")
goods <- c("Apples", "Wine", "Wine", "Cars", "Bananas", "Bananas", "Cars", "Bananas", "Wine")
df <-data.frame(importer, exporter, goods)
table_a <- table(df$importer, df$exporter)
write.csv(table_a, "table_a.csv")
table_b <- table(df$importer, df$exporter, df$goods)
write.csv(table_b, "table_b.csv")
But the CSV output is in the flat format see table_b, where as I would like to show as per the proper table see table a. Any ideas if/how I can achieve this?
解决方案
We can use dcast
from the reshape2
package to reshape the data into a three-way table analogous to an Excel pivot table:
library(reshape2)
pivot3 = dcast(df, goods + importer ~ exporter, fun.aggregate = length)
# Convert values to percent of row
pivot3[, sapply(pivot3, is.numeric)] =
pivot3[, sapply(pivot3, is.numeric)]/rowSums(pivot3[, sapply(pivot3, is.numeric)])
write.csv(pivot3, "table_c.csv")
Below is what you get if you leave the data in form of counts instead of calculating row percentages first.
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