[scilab-Users] Matlab to Scilab conversion

[StŽéphane Mottelet]

Hi,

before launching loader.sce, you should have run builder.sce once (for all).
The following commands should work

--> cd plotlib021-install
--> exec builder.sce

then you can issue a

--> exec loader.sce

to load the toolbox. If you need to load the plotlib each time you 
launch Scilab,
edit your .scilab startup script :

scipad(SCIHOME+"/.scilab")

and add the following line therein :

exec path/plotlib021-install/loade.sce

(replace "path" with the actual path to "plotlib021-install")

S.


Lester Anderson a écrit :
> Hello Dave
>  
> Thanks for the pointer on the toolbox idea. Downloaded and have tried 
> to install/setup on Windows Vista but can't get it to work. Think it's 
> something to do with the path. At the moment I extracted the toolbox 
> folder to C:\users\lester\documents\plotlib021-install   I also use 
> Windows XP but haven't got around to testing on there. I have both 
> version 5.01 and 5.1
>  
> Tried loading the loader.sce file into Scilab:
>  
> Startup execution:
>   loading initial environment
>  mclose: Cannot close file whose descriptor is 2: File is not active.
>    exec('builder.sce',-1)
>                           !--error 241
> File "builder.sce" does not exist or read access denied.
>  
> at line      11 of exec file called by :   
> exec("C:/Users/Lester/Documents/plotlib021-install/loader.sce");
> in  execstr instruction    called by : 
>  
> Given that I am still pretty new with Scilab, it would be useful to 
> know how the scilab plot commands could be used to generate the 
> graphic I showed previously.
>  
> Sorry if this is a basic question/problem but got to learn by asking 
> :) I'm sure I'm missing some basic things with regards to the toolbox 
> issue, but I thought they were pre-built and all you did was run the 
> loader.sce file to get them into Scilab?
>  
> Thanks for the assistance in advance.
>  
> Lester
>  
>  
>
>     ----- Original Message -----
>     *From:* dmcomer at dmcmicro.com <mailto:dmcomer at dmcmicro.com>
>     *To:* users at lists.scilab.org <mailto:users at lists.scilab.org>
>     *Sent:* Wednesday, September 02, 2009 6:50 PM
>     *Subject:* Re: [scilab-Users] Matlab to Scilab conversion
>
>     Lester,
>      
>     If you do not have the plotlib toolbox installed, I recommend it.
>     It will handle the semilogx command
>     without having to convert to the Scilab plot command. Not that the
>     plot command is bad, just easier
>     to convert. Post if yo uhave problems getting plot lib working. I
>     just did this myself. Plotlib can be found
>     on the Scilab contributions site.
>      
>     Dave
>
>         -----Original Message-----
>         *From:* Lester Anderson [mailto:lester at arctica1.wanadoo.co.uk]
>         *Sent:* Wednesday, September 2, 2009 01:30 PM
>         *To:* users at lists.scilab.org
>         *Subject:* [scilab-Users] Matlab to Scilab conversion
>
>         Hello
>          
>         I am fairly new to using Scilab (and Matlab) but need to
>         convert some existing files. I have attached an example which
>         I can't get to work and the image of the correct plot from Matlab.
>          
>         Original Matlab file:
>          
>         rho_m=3300; % in kg/m^3
>         rho_infill=2700;    % in kg/m^3
>         E=1e11;    % in kg/m/s^2
>         v=0.25;
>         g=9.81; % in m/s^2
>         l1=1e3:2e3:50e3;    % in m
>         l2=75e3:25e3:1000e3;    % in m
>         l=[l1 l2];  % in m
>         k=1./l; % in 1/m
>          
>         for Te=0:10e3:100e3    % in m
>             D=E*Te^3/(12*(1-v^2));
>             phi=1./((D.*k.^4./((rho_m-rho_infill)*g))+1);
>             semilogx(k,phi)
>             hold on
>             title('\Phi _e(k) for various T_e')
>             xlabel('Wavenumber k')
>             ylabel('\Phi _e(k)')
>         end
>         text(1.7e-6,0.5,'T_e=100km')
>         text(3.6e-5,0.5,'T_e=10km')
>         text(8e-5,0.95,'T_e=0km')
>          
>         Output from the conversion below:
>          
>         // Display mode
>         mode(0);
>          
>         // Display warning for floating point exception
>         ieee(1);
>          
>         rho_m = 3300;
>         // in kg/m^3
>         rho_infill = 2700;
>         // in kg/m^3
>         E = 100000000000;
>         // in kg/m/s^2
>         v = 0.25;
>         g = 9.81;
>         // in m/s^2
>         l1 = 1000:2000:50000;
>         // in m
>         l2 = 75000:25000:1000000;
>         // in m
>         l = [l1,l2];
>         // in m
>         k = 1 ./l;
>         // in 1/m
>          
>         for Te = 0:10000:100000
>           // in m
>           D = (E*(Te^3))/(12*(1-v^2));
>           phi = 1 ./((D .*(k .^4)) ./((rho_m-rho_infill)*g)+1);
>           // !! L.14: Matlab function semilogx not yet converted,
>         original calling sequence used.
>           semilogx(k,phi)
>           set(gca(),"auto_clear","off")
>           title("\Phi _e(k) for various T_e")
>           xlabel("Wavenumber k")
>           ylabel("\Phi _e(k)")
>         end;
>         // !! L.20: Matlab function text not yet converted, original
>         calling sequence used.
>         text(0.0000017,0.5,"T_e=100km")
>         // !! L.21: Matlab function text not yet converted, original
>         calling sequence used.
>         text(0.000036,0.5,"T_e=10km")
>         // !! L.22: Matlab function text not yet converted, original
>         calling sequence used.
>         text(0.00008,0.95,"T_e=0km")
>          
>         Hopefully someone can see what is needed to get things
>         working. Thanks in advance all.
>          
>         Lester Anderson
>

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