直角坐标与极坐标的转换---例题

森之张卫东

2. <div>function [r, theta] = rect2polar(x, y)</div><div>%RECT2POLAR Convert rectangular to polar coordinates</div><div>%<span class="Apple-tab-span" style="white-space:pre">        </span>Function RECT2POLAR accept the rectangular coordinates</div><div>%<span class="Apple-tab-span" style="white-space:pre">        </span>(x, y) and converts them into the polar coordinates</div><div>%<span class="Apple-tab-span" style="white-space:pre">        </span>(r, theta), where theta is expressed in degrees.</div><div>%</div><div>%<span class="Apple-tab-span" style="white-space:pre">        </span>Calling sequence:</div><div>%<span class="Apple-tab-span" style="white-space:pre">                </span>[r, theta] = rect2polar(x, y)</div><div>%</div><div>%<span class="Apple-tab-span" style="white-space:pre">        </span>Define variables:</div><div>%<span class="Apple-tab-span" style="white-space:pre">        </span>r<span class="Apple-tab-span" style="white-space:pre">                        </span>--Length of polar vector</div><div>%<span class="Apple-tab-span" style="white-space:pre">        </span>theta<span class="Apple-tab-span" style="white-space:pre">                        </span>--Angle of vector in degrees</div><div>%<span class="Apple-tab-span" style="white-space:pre">        </span>x<span class="Apple-tab-span" style="white-space:pre">                        </span>--x-position of point</div><div>%<span class="Apple-tab-span" style="white-space:pre">        </span>y<span class="Apple-tab-span" style="white-space:pre">                        </span>--y-position of point</div><div>%</div><div>%<span class="Apple-tab-span" style="white-space:pre">        </span>Record of revisions:</div><div>%<span class="Apple-tab-span" style="white-space:pre">                </span>Date<span class="Apple-tab-span" style="white-space:pre">                </span>Programmer<span class="Apple-tab-span" style="white-space:pre">                </span>Descriptoin of change</div><div>%<span class="Apple-tab-span" style="white-space:pre">                </span>====<span class="Apple-tab-span" style="white-space:pre">                </span>=========<span class="Apple-tab-span" style="white-space:pre">                </span>===============</div><div>%<span class="Apple-tab-span" style="white-space:pre">                </span>09/19/00<span class="Apple-tab-span" style="white-space:pre">        </span>S.J.Chapman<span class="Apple-tab-span" style="white-space:pre">                </span>Original code</div><div>
   
3. </div><div>r = sqrt( x .^2 + y .^2);</div><div>theta = 180/pi * atan2(y, x);</div><div></div>

<div>function [r, theta] = rect2polar(x, y)</div><div>%RECT2POLAR Convert rectangular to polar coordinates</div><div>%<span class="Apple-tab-span" style="white-space:pre">        </span>Function RECT2POLAR accept the rectangular coordinates</div><div>%<span class="Apple-tab-span" style="white-space:pre">        </span>(x, y) and converts them into the polar coordinates</div><div>%<span class="Apple-tab-span" style="white-space:pre">        </span>(r, theta), where theta is expressed in degrees.</div><div>%</div><div>%<span class="Apple-tab-span" style="white-space:pre">        </span>Calling sequence:</div><div>%<span class="Apple-tab-span" style="white-space:pre">                </span>[r, theta] = rect2polar(x, y)</div><div>%</div><div>%<span class="Apple-tab-span" style="white-space:pre">        </span>Define variables:</div><div>%<span class="Apple-tab-span" style="white-space:pre">        </span>r<span class="Apple-tab-span" style="white-space:pre">                        </span>--Length of polar vector</div><div>%<span class="Apple-tab-span" style="white-space:pre">        </span>theta<span class="Apple-tab-span" style="white-space:pre">                        </span>--Angle of vector in degrees</div><div>%<span class="Apple-tab-span" style="white-space:pre">        </span>x<span class="Apple-tab-span" style="white-space:pre">                        </span>--x-position of point</div><div>%<span class="Apple-tab-span" style="white-space:pre">        </span>y<span class="Apple-tab-span" style="white-space:pre">                        </span>--y-position of point</div><div>%</div><div>%<span class="Apple-tab-span" style="white-space:pre">        </span>Record of revisions:</div><div>%<span class="Apple-tab-span" style="white-space:pre">                </span>Date<span class="Apple-tab-span" style="white-space:pre">                </span>Programmer<span class="Apple-tab-span" style="white-space:pre">                </span>Descriptoin of change</div><div>%<span class="Apple-tab-span" style="white-space:pre">                </span>====<span class="Apple-tab-span" style="white-space:pre">                </span>=========<span class="Apple-tab-span" style="white-space:pre">                </span>===============</div><div>%<span class="Apple-tab-span" style="white-space:pre">                </span>09/19/00<span class="Apple-tab-span" style="white-space:pre">        </span>S.J.Chapman<span class="Apple-tab-span" style="white-space:pre">                </span>Original code</div><div><br /> </div><div>r = sqrt( x .^2 + y .^2);</div><div>theta = 180/pi * atan2(y, x);</div><div></div>

详细内容见附件：

森之张卫东

2. function [r, theta] = rect2polar(x, y)
   
3. %RECT2POLAR Convert rectangular to polar coordinates
   
4. %        Function RECT2POLAR accept the rectangular coordinates
   
5. %        (x, y) and converts them into the polar coordinates
   
6. %        (r, theta), where theta is expressed in degrees.
   
7. %
   
8. %        Calling sequence:
   
9. %                [r, theta] = rect2polar(x, y)
   
10. %
    
11. %        Define variables:
    
12. %        r                        --Length of polar vector
    
13. %        theta                        --Angle of vector in degrees
    
14. %        x                        --x-position of point
    
15. %        y                        --y-position of point
    
16. %
    
17. %        Record of revisions:
    
18. %                Date                Programmer                Descriptoin of change
    
19. %                ====                =========                ===============
    
20. %                09/19/00        S.J.Chapman                Original code
    
21. 
    
22. r = sqrt( x .^2 + y .^2);
    
23. theta = 180/pi * atan2(y, x);
    

function [r, theta] = rect2polar(x, y)<br /> %RECT2POLAR Convert rectangular to polar coordinates<br /> %        Function RECT2POLAR accept the rectangular coordinates<br /> %        (x, y) and converts them into the polar coordinates<br /> %        (r, theta), where theta is expressed in degrees.<br /> %<br /> %        Calling sequence:<br /> %                [r, theta] = rect2polar(x, y)<br /> %<br /> %        Define variables:<br /> %        r                        --Length of polar vector<br /> %        theta                        --Angle of vector in degrees<br /> %        x                        --x-position of point<br /> %        y                        --y-position of point<br /> %<br /> %        Record of revisions:<br /> %                Date                Programmer                Descriptoin of change<br /> %                ====                =========                ===============<br /> %                09/19/00        S.J.Chapman                Original code<br /> <br /> r = sqrt( x .^2 + y .^2);<br /> theta = 180/pi * atan2(y, x);<br />

司马追

好东西，我喜欢！！！！