R中的轴标签:p(Y = y | theta =某物) [英] Axis Labels in R: p(Y=y | theta = something)

问题描述

我已经搜索了所有内容，找不到像这样的具有条件符号的代码

I've searched all over and can't find the code for having a conditional sign as in

p(a | b)

我正在使用的代码(通用R代码，不是ggplot)是

The code (generic R code, not ggplot) I'm using is

ylab = bquote(Pr( Y == y |  theta == .(mytheta) , n == .(n)))

这给我一个标签就是

Pr(|(Y = y，theta = 0.2)，n = 10)

Pr(|(Y=y,theta=0.2), n=10)

theta是希腊文的正确符号，mytheta是0.2，n是10. 因此，所有不起作用的是条件标志.在我看来，R正在接受|或...

Where the theta is a proper Greek symbol, mytheta is 0.2, and n is 10. So all that's not working is the conditional sign. It looks to me like R is taking the | for an or...

我还没有尝试过ggplot，但是想首先让它在普通R中工作.

I haven't tried ggplot yet, but would like to get this working in plain R first.

感谢您的帮助.

推荐答案

我认为看到'pipe'(vs.'OR')被解析为波兰语表示法非常有趣.可以使用?plotmath和?points

I thought it was pretty interesting to see that 'pipe' (vs. 'OR') get parsed into Polish notation. The conditional-bar can be accessed with the Symbol font using the methods described in ?plotmath and ?points

plot(1,1, main=bquote(Pr( Y == y ~ symbol("\275") ~ theta == .(mytheta) , n == .(n))))

(我确实尝试使用%|%作为缺少的条件符号来制作SPECIAL用户定义的函数，但失败了.)

(I did try making a SPECIAL user-defined function using %|% as the missing conditional symbol, but failed.)

在您的评论问题中要求提供插图(实际上是两种等效使用方式substitute的版本:

To your comment-question asking for an illustration (actually two versions of how to use substitute in an equivalent manner:

mytheta = 0.2
plot(rnorm(100), rnorm(100), ylab= substitute(P(Y~"|"~ mytheta ), list(mytheta=mytheta)) )
plot(rnorm(100), rnorm(100), ylab= substitute(P(Y~"|"~ theta == mytheta ), 
                                                    list(mytheta=mytheta))  )
 # Second version prints greek-theta == value

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