Andreas Leha <andreas.leha <at> med.uni-goettingen.de> writes:
>
> Hi Michael,
>
> Michael Weylandt <michael.weylandt <at> gmail.com> writes:
>
> > Hi,
> >
> > I want to put a summary of my analysis at the beginning of a document
> > using results calculated at the end of the document. Is this possible?
[snip]
> >
> > Is this possible in a single pass?
Not quite. The method suggested by Andreas computes the result twice. If
there is any randomness in the results (as in the example) you will get a
different answer in the summary than when the block is later evaluated.
> > I've played with #+NAME and
> > <<block()>> but haven't gotten the out-of-order evaluation quite
> > right.
You can use
#+results: the-mean
before
#+NAME: the-mean
#+begin_src R
mean(x)
#+end_src
which is after 'theanalysis' block.
And if the format is not pleasing add a filter that reformats the result.
> >
> > Michael
> >
>
> How about something along:
>
> --8<---------------cut here---------------start------------->8---
> #+TITLE: Test
> #+AUTHOR: Michael Weylandt
> #+PROPERTY: header-args:R :session *__R__* :exports both
>
> * Summary
> The mean result was src_R[:exports results :var
analysisresults=theanalysis()]{mean(unlist(analysisresults))}
>
> * Analysis,
> We do some complicated calculations:
>
> #+name: theanalysis
> #+BEGIN_SRC R
> x <- rnorm(5)
> #+END_SRC
> --8<---------------cut here---------------end--------------->8---
It might be better to mark all the blocks in the doc ':eval never'
and ':exports code' or ':exports none' and put blocks before the first
headline that do all the calcs from noweb references, and put the #+results
lines (if you need them) wherever you want them in the doc. Like so:
--8<---------------cut here---------------start------------->8---
#+TITLE: Test
#+AUTHOR: Michael Weylandt
#+PROPERTY: header-args:R :session *__R__* :exports both
#+NAME: master
#+BEGIN_SRC R :noweb yes :results silent :exports results
<<theanalysis>>
#+END_SRC
* Summary
The mean result was src_R[:exports results]{mean(x)}
* Analysis,
We do some complicated calculations:
#+name: theanalysis
#+BEGIN_SRC R :eval never :exports code
x <- rnorm(5)
#+END_SRC
--8<---------------cut here---------------end--------------->8---
IMO, needing ':exports results' for inline src blocks is a bug not a
feature.
HTH,
Chuck
