如何调整 geom_line 中的线条大小而不获取另一个（无用的）图例？

发布于 2024-09-12 18:03:18 字数 722 浏览 1 评论 0原文

我想调整我的线条（两条）的大小，因为我觉得它们太瘦了。以下代码执行此操作，但创建了 size 的图例，这是无用的，因为 size 没有可以映射到它的变量。

qplot(date,value,data=graph1,geom="line",colour=variable,xlab="",ylab="",size=1)
+ scale_y_continuous(limits = c(-0.3,0.3)) + opts(aspect.ratio = 2/(1+sqrt(5))) 
+ scale_colour_manual("Variable",c(Line1="red",Line2="blue")) 
+ opts(legend.size="none")

我的图由两条线组成，代表同一时间跨度内两个不同变量的时间序列。该变量映射为颜色。如果我尝试影响线条的大小，qplot 总是尝试将“大小”映射到另一个参数并显示另一个图例。

我还关注了此讨论，最终以 Hadley 结束告诉其他人删除部分图例尚未实现。据我所知，向混合中添加另一个参数意味着需要该参数的图例。也许我只是出于视觉原因使用了错误的命令来影响线条大小。

感谢您的任何建议！

原文

i´d like to adjust the size of my lines (both of them), because i feel they're too skinny.
The following code does so, but creates a legend for size, which is useless since size has no variable that can be mapped to it.

qplot(date,value,data=graph1,geom="line",colour=variable,xlab="",ylab="",size=1)
+ scale_y_continuous(limits = c(-0.3,0.3)) + opts(aspect.ratio = 2/(1+sqrt(5))) 
+ scale_colour_manual("Variable",c(Line1="red",Line2="blue")) 
+ opts(legend.size="none")

My plot consists of two lines representing a time series of two different variables over the same time span. The variable is mapped to color. If I try to influence the size of the line, qplot always tries to map "size" to another parameter and display another legend.

I also followed this discussion, that ended with Hadley telling the others that removing a part of the legend is not implemented yet.
I understand that adding another paramater to the mix implies the need of a legend for this parameter. Maybe I am using the wrong command to influence line size just for visual reasons.

Thx for any suggestions!

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明媚如初 2024-09-19 18:03:18

我相信在 qplot() 中，所有美学设置都被解释为在 aes() 内。如果您不希望尺寸设置出现在图例中，请按原样用 I() 包裹该值。

qplot(date, value,data=graph1,
      geom="line",
      colour=variable,xlab="",
      ylab="",
      size= I(1))+
   scale_y_continuous(limits = c(-0.3,0.3))+
   scale_colour_manual("Variable",c(Line1="red",Line2="blue"))+ 
   opts(legend.size="none",
        aspect.ratio = 2/(1+sqrt(5)))

现在不应该有尺寸图例了。

另一件需要注意的事情是，现在可以从图例中消除美学尺度。例如，如果您想以更困难的方式删除尺寸比例，您可以这样做

last_plot() + scale_size(legend = F)

I believe in qplot() all aesthetic settings are interpreted as being within aes(). If you don't want your size setting to appear in the legend, wrap the value with I() for as-is.

qplot(date, value,data=graph1,
      geom="line",
      colour=variable,xlab="",
      ylab="",
      size= I(1))+
   scale_y_continuous(limits = c(-0.3,0.3))+
   scale_colour_manual("Variable",c(Line1="red",Line2="blue"))+ 
   opts(legend.size="none",
        aspect.ratio = 2/(1+sqrt(5)))

Now there shouldn't be a size legend.

Another thing to note is that eliminating an aesthetic scale from the legend is now possible. If, for instance, you wanted to remove the size scale a harder way, you could do