ggplot显示堆叠时不计数的百分比

Question

I am trying make a stacked barplot of following data:

 df_APP -> Date        CBPP3  ABSPP    PSPP   CSPP
           2018-06-01 254551  27413 1991168 157034
           2018-05-25 253297  27241 1987753 155648
           2018-05-18 253759  27428 1984125 154796
           2018-05-11 253270  27149 1980743 153637
           2018-05-04 252583  27135 1972850 152593

I use following code to melt the data and delete rows with NAs:

APP <- as.data.frame(df_APP)
new_APP <- melt(APP, id = "Date")
new_APP <- new_APP[-which(is.na(new_APP$value)),]

I plot the melted dataset using:

ggplot(new_APP, aes(x=Date, y=value, fill = variable)) +
geom_bar(position = "fill", stat = "identity") 

My graph does not show count but percent instead as you can see below, and I cannot figure out why.

Answer 1

When you visit the bar charts reference you can read the following:"By default, multiple bars occupying the same x position will be stacked atop one another by position_stack(). (...) Finally, position_fill() shows relative proportions at each x by stacking the bars and then standardising each bar to have the same height."

Delete the position = "fill" argument and it should show a "count" legend instead of a percentage.

Answer 2

Position fill will fill up the full chart across every point to show the ratio. Hence the "fill" that exists. That is a stacked bar chart that you have posted

ggplot(new_APP, aes(x=Date, y=value, fill = variable)) + geom_col()

can work, also

ggplot(new_APP, aes(x=Date, y=value, fill = variable)) +
geom_bar(position = "stack", stat = "identity") 

can work.