[Scilab-Dev] Fwd: Allan variance

[Sylvestre Ledru]

Le mardi 14 juin 2011 à 20:02 +0200, Paul Cazottes a écrit :
> Hello,
> 
> I would like to make a Allan varian script. This tool was first designed for 
> time reference, and is becoming a de-facto standard to show the performance of 
> inertial sensors (accelerometers and gyrometers).
> 
> We now can find scripts for Matlab as contribution, but I was not able to find 
> it for scilab. I made one and would like to bring it to scilab, with full help 
> etc etc.
Thanks!

> Is it possible for scilab devs to explain me:
> - how to make an optionnal argument in the syntax? Presently I would like to 
> have a  syntax as AllanM(X,st,Npoints) where Npoints is optionnal and defaults 
> to 100.
See argn:
http://help.scilab.org/docs/5.3.2/en_US/argn.html

Example:
function AllanM(X,st,Npoints)    
    if argn(2) == 2 then
        Npoints = 2
    end
endfunction


> - write a help file? I didn't find an official tutorial in scilab.org 
We are using docbook for the help. You will find a module example in
contrib/toolbox_skeleton

you will find some help page examples in it.


> - parallelize? The for loop is fully parallelizable. The Allan variance is 
> simple to calculate yet CPU intensive on large sets. Maybe parrallelization is 
> more for Scilab 6?
See parallel_run
http://help.scilab.org/docs/5.3.2/en_US/parallel_run.html

but it does not work under Windows.

> I would greatly appreciate helt on these points. Thanks for scilab devs to 
> bring this product to everybody!
Thanks!

Sylvestre