关于 r:ggplot 在期望闪避图时产生堆积条

ggplot producing stacked bar when expecting a dodge chart

我有一个数据集，在一张表中显示产品、会计期间和交易。

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app$FISCAL_PERIOD <-(201604,201604,201604,201605,201605,201605,201606,201606,201606,201607,201607,201607,201608,201608,201608,201609,201609,201610,201610,201611,201611)

app$Product <- c("Product 1","Product 3","Other","Product 1","Product 3","Other","Product 1","Product 3","Other","Product 1","Product 3","Other","Product 1","Product 3","Other","Product 2","Product 3","Product 2","Product 3","Product 2","Product 3")

app$sum_trans<-c(78,23410,1946,84,29532,417,16,30364,129,305,32386,584,424,20873,274,20,20929,470,19261,10,6131)

当我运行它时，我得到了我希望的图表，一个"躲避"的条形图：

ggplot(data=app, aes(x=FISCAL_PERIOD, y=sum_trans, fill=Product)) + geom_bar(stat="identity", position=position_dodge(), colour="black")

但是当我运行它时，我得到了一个堆积条形图，这不是我需要的：

ggplot(data=app, aes(x=Product, y=sum_trans, fill=FISCAL_PERIOD)) + geom_bar(stat="identity", position=position_dodge(), colour="black")

这可能是因为 ggplot 不将 FISCAL_PERIOD 变量理解为因子变量。这应该可以解决问题：

1 2	ggplot(data=app, aes(x=Product, y=sum_trans, fill=as.factor(FISCAL_PERIOD))) + geom_bar(stat="identity", position="dodge", colour="black")