[Scilab-users] Avoiding a loop

[Tim Wescott]

I had a cool solution for you, but then I saw that you're implementing
a difference equation, with current values of batt (for instance)
depending on prior values.

I think that no, you can't eliminate the loop.  If speed is a concern
and if you're using the code heavily, you can put it in a C function --
but that's only for really heavy pro users.

On Wed, 2017-05-10 at 17:23 +0200, Frieder Nikolaisen wrote:
> Hello,
> I did write an example code, but I do not like the time consuming way
> I solved the problem. With 50 000 lines in the matrix, it wouldn't be
> fun.
> How can I avoid using the for-loop?
> 10,     80;
> 11,     200
> 15,     0];
> 
> batt = 1000;
> gen = 0;
> 
> n = 1
> for n=1:5
> 
>     if P(n,2) > 100 then
>         if batt > 800 then batt = batt - P(n,2) * (P(n+1,1) - P(n,1))
>         else
>         gen = gen + P(n,2) * (P(n+1,1) - P(n,1))
>         end
>     
>     else
>     batt = batt - P(n,2) * (P(n+1,1) - P(n,1))
>     end
> disp('n ' + string(n))
> disp('batt ' + string(batt))
> disp('gen ' + string(gen))
> end
> Thanks alot!
> 
> Best regards
> Frieder 
>  
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-- 

Tim Wescott
www.wescottdesign.com
Control & Communications systems, circuit & software design.
Phone: 503.631.7815
Cell:  503.349.8432