如何为ggplot的AES使用数据帧的名称和行名? [英] How to use names and rownames of a dataframe for the aes of ggplot?
问题描述
我有一个看起来像这样的数据框enrichment_df
I have a dataframe enrichment_df
that looks like this
meclocycline pimozide isocorydine alvespimycin
day1_day3__sham3_strict_enrichment -0.869 0.855 -0.859 0.539
hour4_day1_day3__sham3_strict_enrichment -0.294 0.268 -0.539 -0.120
day7_day14__sham3_strict_enrichment -0.333 0.404 0.297 0.233
day90__sham3_strict_enrichment -0.511 -0.657 -0.519 0.184
day14__sham3_strict_enrichment -0.239 -0.420 0.513 -0.422
day7__sham3_strict_enrichment -0.394 -0.380 -0.408 0.337
,我想用 https://stackoverflow.com/a/23228273/651779 中的示例制作一个重叠的条形图.一个>.我希望填充为行名,x轴为列名.我尝试用
and I want to make an overlapping barplot with the example from https://stackoverflow.com/a/23228273/651779. I want the fill to be the rownames, and the x-axis the colnames. I try to plot it with
ggplot(enrichment_df, aes_string(names(enrichment_df), fill = rownames(enrichment_df))) +
geom_bar(position = 'identity', alpha = .3)
但是,这给出了错误object 'day1_day3__sham3_strict_enrichment' not found
如何在ggplot的AES(或aes_string)中使用行名和列名?
How can I use the rownames and colnames in the aes (or aes_string) of ggplot?
推荐答案
每当使用ggplot
时,您都应该使用长格式的数据:
Whenever using ggplot
you should have your data in long format:
enrichment_df[ "day" ] <- rownames(enrichment_df)
df.molten <- melt( enrichment_df, id.vars="day", value.name="Enrichment", variable.name="Antibiotics" )
head(df.molten)
day Antibiotics Enrichment
1 day1_day3__sham3_strict_enrichment meclocycline -0.869
2 hour4_day1_day3__sham3_strict_enrichment meclocycline -0.294
3 day7_day14__sham3_strict_enrichment meclocycline -0.333
这可以由
ggplot(df.molten, aes( x = Antibiotics, y = Enrichment, fill = day ) ) +
geom_bar( position = "identity", stat = "identity", alpha = .3 )
我不确定是否要查找具有负值的position = "identity"
.
I'm not sure though if position = "identity"
with negative values is what you are looking for.
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