Re: some general questions

[Tuomo Keskitalo <Tuomo.Keskitalo@iki.fi>]

Hello,

your ideas seem quite promising, I look forward to see your code. :-)

On 10/06/2009 11:34 PM, Gerard Jungman wrote:

>>>  Q6. More a statement than a question: We should be more explicit
>>>      about the levelization of the design. This means expressing
>>>      the dependence of components clearly. For example, matrix
...
> I don't think this is a problem for machine solution. It's up to
> us to decide how the thing is organized. What depends on what,
> which parts are foundational, and which parts are built on
> top of those? Then we should organize the code so it
> expresses that.

I run a few ad hoc shell commands described below, to find the 
interdependencies within current GSL directories. Even though the 
results are probably not complete nor fully correct, this might provide 
a starting point for the organization?

-----

Lowest level ("many" dependencies): blas, block, cblas, complex, vector, 
err, ieee_utils

Intermediate level (at least one other directory seems to use these): 
eigen, histogram, integration, linalg, min, permutation, poly, randist, 
rng, roots, sort, statistics

Highest level (no other directory seems to use these): bspline, cdf, 
cheb, combination, const, deriv, dht, diff, fit, fft, interpolation, 
monte, multifit, multimin, multiroots, ntuple, ode-initval, qrng, siman, 
specfunc, sum, wavelet

-----

I got to this result by running the following commands with zsh in 
gsl-1.13 root directory, and by ogling the resulting 
gsl-dependencies.txt file.

for f in `find -type d`; do; for g in `grep include $f/*.h $f/*.c`; do; 
echo "$f : $g" >> out; done; done;

grep ': <' <out | sort | uniq | egrep -v 'doc/examples' > 
gsl-dependencies-all.txt

for f in `find -type d | perl -pe 's/\.\///' | sort`; do; echo "$f is 
used by:" >> gsl-dependencies.txt; grep $f gsl-dependencies-all.txt | 
egrep -v "^\.\/$f" >> gsl-dependencies.txt; echo "" 
 >>gsl-dependencies.txt; done;

-- 
Tuomo.Keskitalo@iki.fi
http://iki.fi/tuomo.keskitalo