knitr
out.width
fig.width
render_book()
serve_book()
toc_depth
fig.cap
fig.pos="H"
axis description cs
declare function
pgfmathparse
pgfmathdeclarefunction
|-
-|
pgfplotsinvokeforeach
addplot+
%>%
dplyr
ggplot2
%/%
rep
seq
<<-
tableone
lifelines
%r
https://zh.wikipedia.org/wiki/愛因斯坦-德哈斯效應
https://en.wikipedia.org/wiki/Einstein%E2%80%93de_Haas_effect
https://www.youtube.com/watch?v=BbEHApXFTQc