如何用ggplot创建并排的条形图（用于多个系列）？

我有两组数据（3列：x = categorical，y =数字，l =位置），我想创建一个条形图，其中包含x轴上的类别，对于每个类别的值，垂直条，颜色不同，每个位置的y值。默认情况下，Excel/OpenOffice生成这种图表。如何用ggplot创建并排的条形图（用于多个系列）？

我试图

qplot (x,y,data=mydata,col=location, geom="histogram")

但它产生堆积条形图，不并排。然后我查看了ggplot2文档，没有找到任何其他可以使用的geom（见下面的完整列表）。

这不可能与ggplot2？

在此先感谢。

Name Description 
abline - Line, speciﬁed by slope and intercept 
area - Area plots 
bar - Bars, rectangles with bases on y-axis 
blank - Blank, draws nothing 
boxplot - Box-and-whisker plot 
contour - Display contours of a 3d surface in 2d 
crossbar - Hollow bar with middle indicated by horizontal line 
density - Display a smooth density estimate 
density_2d - Contours from a 2d density estimate 
errorbar - Error bars 
histogram - Histogram 
hline - Line, horizontal 
interval - Base for all interval (range) geoms 
jitter - Points, jittered to reduce overplotting 
line - Connect observations, in order of x value 
linerange - An interval represented by a vertical line 
path - Connect observations, in original order 
point - Points, as for a scatterplot 
pointrange - An interval represented by a vertical line, with a point 
in the middle 
polygon - Polygon, a ﬁlled path 
quantile - Add quantile lines from a quantile regression 
ribbon - Ribbons, y range with continuous x values 
rug - Marginal rug plots 
segment - Single line segments 
smooth - Add a smoothed condition mean 
step - Connect observations by stairs 
text - Textual annotations 
tile - Tile plot as densely as possible, assuming that every tile is the same size 
vline - Line, vertical

来源

2010-09-07 wishihadabettername

几何对象，而不是几何对象。 – hadley 2010-09-07 23:08:16

我已经纠正了这个问题。并感谢您创建ggplot2！ – wishihadabettername 2010-09-08 00:33:19

有一个position参数默认为stack这里。使用：

qplot (x,y,data=mydata,col=location, geom="bar", position="dodge")

这是在手册中，只需搜索“闪避”。另外，如果y值给出了条的高度，则可能需要“条”几何。

来源

2010-09-07 19:59:14 Aniko

如何用ggplot创建并排的条形图（用于多个系列）？

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