Axis Labels in R: p(Y=y | theta = something) -

i've searched on , can't find code having conditional sign in

p(a|b)

the code (generic r code, not ggplot) i'm using

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

what gives me label

pr(|(y=y,theta=0.2), n=10)

where theta proper greek symbol, mytheta 0.2, , n 10. that's not working conditional sign. looks me r taking | or...

i haven't tried ggplot yet, working in plain r first.

thanks help.

i thought pretty interesting see 'pipe' (vs. 'or') parsed polish notation. conditional-bar can accessed symbol font using methods described in ?plotmath , ?points

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

(i did try making special user-defined function using %|% missing conditional symbol, failed.)

to comment-question asking illustration (actually 2 versions of how use substitute in 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