[英]Modifying the 'percent' format for geom_bar in ggplot2
我試圖讓geom_bar將計數除以一個歸一化因子,而不是除以sum(.. counts ..),例如
n=200
df = data.frame(let = letters[sample(1:26,n,replace=TRUE)],
cat=letters[sample(1:2,n,replace=TRUE)],
norm = as.integer(1+round(runif(n)*10))
d <- ggplot(df, aes(let,fill=cat)) +
geom_bar(aes(y = ((..count..)/sum(..count..))),position='dodge')
相反,我想除以一個歸一化因子:
d <- ggplot(df, aes(let,fill=cat)) +
geom_bar(aes(y = ((..count..)/norm)),position='dodge')
但這會產生一個錯誤:
> d
Error in (count)/norm : non-numeric argument to binary operator
這只是一個玩具的例子。 我的實際代碼有一個不同的錯誤,我還沒有復制:
> ggplot(droplevels(dfR[keep,]), aes(x=loc_breakBinned,fill=amalgamated_group) ) +
geom_bar(aes(y = ((..count..)/subject_count_ASDvTD)),position='dodge')
Error in eval(expr, envir, enclos) :
object 'subject_count_ASDvTD' not found
ggplot2堅持認為subject_count_ASDvTD
不是dfR的一部分,但快速瀏覽便清楚地表明它是:
> str(dfR[keep,c('amalgamated_group','loc_breakBinned','subject_count_ASDvTD')])
'data.frame': 3694 obs. of 3 variables:
$ amalgamated_group : Factor w/ 6 levels "ASD","CONTRAST",..: 1 1 1 1 1 1 1 1 1 1 ...
$ loc_breakBinned : Factor w/ 18 levels "pos:(10.7,12.8]_totExonD:(-0.00822,1.64]",..: 14 1 8 8 14 4 8 13 8 14 ...
$ subject_count_ASDvTD: int 213 213 213 213 213 213 213 213 213 213 ...
這里發生了什么? 為什么gant不能看到subject_count_ASDvTD
?
注意:相同的錯誤來自
ggplot(droplevels(dfR[keep,]), aes(x=loc_breakBinned,fill=amalgamated_group,y = ((..count..)/subject_count_ASDvTD) ) ) +
geom_bar(position='dodge')
解決方案是在aes中定義變量。 感謝@aosmith幫助我解決這個問題。 上面代碼的更正版本可以在下面找到:
d <- ggplot(df, aes(let,fill=cat,norm=norm)) +
geom_bar(aes(y = ((..count..)/norm)),position='dodge')
以及更復雜的實際代碼:
ggplot(droplevels(dfR[keep,]), aes(subject_count=subject_count_ASDvTD,x=loc_breakBinned,fill=amalgamated_group,y = ((..count..)/subject_count) ) ) +
geom_bar(position='dodge')
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