<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /></head><body style='font-size: 10pt; font-family: Verdana,Geneva,sans-serif'>
<div class="pre" style="margin: 0; padding: 0; font-family: monospace">Hi All<br /> <br /> I'm wondering what is the way to solve the following study (but at the same time I'm not sure that the problem has been correctly posed) ... I'm a bit "disrupted" by theta scalar that depends itself on x value.</div>
<div class="pre" style="margin: 0; padding: 0; font-family: monospace"> </div>
<div class="pre" style="margin: 0; padding: 0; font-family: monospace">The problem seems to be non linear and I tried (but I failed) in using fsolve.</div>
<div class="pre" style="margin: 0; padding: 0; font-family: monospace"> </div>
<div class="pre" style="margin: 0; padding: 0; font-family: monospace">Any suggestion where I've to see to?</div>
<div class="pre" style="margin: 0; padding: 0; font-family: monospace"> </div>
<div class="pre" style="margin: 0; padding: 0; font-family: monospace">Thanks for your time and help</div>
<div class="pre" style="margin: 0; padding: 0; font-family: monospace"> </div>
<div class="pre" style="margin: 0; padding: 0; font-family: monospace">Paul</div>
<div class="pre" style="margin: 0; padding: 0; font-family: monospace"> </div>
<div class="pre" style="margin: 0; padding: 0; font-family: monospace"> </div>
<div class="pre" style="margin: 0; padding: 0; font-family: monospace"> </div>
<div class="pre" style="margin: 0; padding: 0; font-family: monospace">#################################################</div>
<div class="pre" style="margin: 0; padding: 0; font-family: monospace">
<pre><span>function</span> <span>y</span><span>=</span><span>calculus</span><span>(</span><span>x</span><span>)</span>
<span>theta</span> <span>=</span> <span>[</span> <span>1</span> <span>100</span> <span>200</span> <span>300</span>
<span>1000</span> <span>1200</span> <span>1500</span> <span>2000</span><span>]</span><span>'</span><span>;</span>
<span>theta_interp</span> <span>=</span> <span>interp1</span><span>(</span><span>theta</span><span>(</span><span>:</span><span>,</span><span>1</span><span>)</span><span>,</span><span>theta</span><span>(</span><span>:</span><span>,</span><span>2</span><span>)</span><span>,</span><span>x</span><span>,</span><span>'</span><span>linear</span><span>'</span><span>)</span><span>;</span>
<span>y</span> <span>=</span> <span>-</span><span>theta_interp</span> <span>*</span> <span>0.268</span> <span>+</span> <span>120</span> <span>-</span><span>x</span><span>;</span> <span>//pause</span>
<span>// if theta = 1 : y = 0 -</span><span>></span><span> x = 120 - 0.268 = 119.73</span>
<span>// if theta = 100 : y = 0 -</span><span>></span><span> x = 120 - 26.8 = 93.2</span>
<span>// if theta = 200 : x = 66.4</span>
<span>// if theta = 300 : x = 120 - 0.268 = 39.6</span>
<span>// can we say that y belongs to [39.6 , 119.73] ?</span>
<span>endfunction</span>
<span>[</span><span>x</span><span>,</span><span>v</span><span>,</span><span>info</span><span>]</span> <span>=</span> <span>fsolve</span><span>(</span><span>0</span><span>,</span><span>calculus</span><span>)</span>
</pre>
</div>
</body></html>