help me with Maxima

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Am 16 Mar 2006 um 8:53 hat Tecnico Bonacini geschrieben:

> 
> How could i solve system of non-linear equations (equations with sin(), cos(), log(), ....) with 
> Maxima?
> 
> In Maxima Primer there is onlythis example:
> 
> solve([x+y+z=5,3*x-5*y=10,y+2*z=3],[x,y,z]);
> 
> 
> Thank you
> 
> Best Regards
> 
> Massimo

Hello Massimo,

please have a look at mnewton.mac, which you find in 

Maxima-5.9.2\share\maxima\5.9.2\share\contrib

There is also a demo file.

Example: sin(x)+2*log(y)=0, 3*x+y=0

(%i12) load(mnewton);
(%o12) F:/Programme/Maxima-5.9.2/share/maxima/5.9.2/share/contrib/mnewton.mac

(%i13) mnewton( [ sin(x)+2*log(y), 3*x+y ], [x,y], [1,1] );
(%o13) 	       [[x = - 0.40612911733193, y = 1.218387351995787]]

Hope that helps

Volker van Nek

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<div align="left"><font face="Arial"><span style="font-size:10pt">Am 16 Mar 2006 um 8:53 hat Tecnico Bonacini geschrieben:</span></font></div>
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<div align="left"><font face="Arial" color="#7f0000"><span style="font-size:10pt">&gt; </span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span style="font-size:10pt">&gt; How could i solve system of non-linear equations (equations with sin(), cos(), log(), 
....) with </span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span style="font-size:10pt">&gt; Maxima?</span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span style="font-size:10pt">&gt; </span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span style="font-size:10pt">&gt; In Maxima Primer there is onlythis example:</span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span style="font-size:10pt">&gt; </span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span style="font-size:10pt">&gt; solve([x+y+z=5,3*x-5*y=10,y+2*z=3],[x,y,z]);</span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span style="font-size:10pt">&gt; </span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span style="font-size:10pt">&gt; </span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span style="font-size:10pt">&gt; Thank you</span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span style="font-size:10pt">&gt; </span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span style="font-size:10pt">&gt; Best Regards</span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span style="font-size:10pt">&gt; </span></font></div>
<div align="left"><font face="Arial" color="#7f0000"><span style="font-size:10pt">&gt; Massimo</span></font></div>
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<div align="left"><font face="Arial"><span style="font-size:10pt">Hello Massimo,</span></font></div>
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</div>
<div align="left"><font face="Arial"><span style="font-size:10pt">please have a look at mnewton.mac, which you find in </span></font></div>
<div align="left"><br/>
</div>
<div align="left"><font face="Arial"><span style="font-size:10pt">Maxima-5.9.2\share\maxima\5.9.2\share\contrib</span></font></div>
<div align="left"><br/>
</div>
<div align="left"><font face="Arial"><span style="font-size:10pt">There is also a demo file.</span></font></div>
<div align="left"><br/>
</div>
<div align="left"><font face="Arial"><span style="font-size:10pt">Example: </span></font><font face="Arial"><span style="font-size:10pt">sin(x)+2*log(y)=0, 3*x+y=0</span></font></div>
<div align="left"><br/>
</div>
<div align="left"><font face="Arial"><span style="font-size:10pt">(%i12) load(mnewton);</span></font></div>
<div align="left"><font face="Arial"><span style="font-size:10pt">(%o12) F:/Programme/Maxima-5.9.2/share/maxima/5.9.2/share/contrib/mnewton.mac</span></font></div>
<div align="left"><br/>
</div>
<div align="left"><font face="Arial"><span style="font-size:10pt">(%i13) mnewton( [ sin(x)+2*log(y), 3*x+y ], [x,y], [1,1] );</span></font></div>
<div align="left"><font face="Arial"><span style="font-size:10pt">(%o13) &#160;&#160;&#160;&#160;&#160;&#160; [[x = - 0.40612911733193, y = 1.218387351995787]]</span></font></div>
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<div align="left"><font face="Arial"><span style="font-size:10pt">Hope that helps</span></font></div>
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<div align="left"><font face="Arial"><span style="font-size:10pt">Volker van Nek</span></font></div>
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