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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am having trouble rendering an algebraic expression with a summation sign (capital Sigma). I want an expression that looks like this, using variables for the numeric portions of the expression:<o:p></o:p></p>
<p class="MsoNormal"><img width="279" height="62" id="Picture_x0020_1" src="cid:image003.jpg@01D26D87.FB7A6240"><o:p></o:p></p>
<p class="MsoNormal">I am able to render the integration sign using this code:<o:p></o:p></p>
<p class="MsoNormal">$function = "$numer/$denom [pi + int($sum_numer/($sum_denom_n_coeff n - $sum_denom_const),1,3)*sin($w nt)]";<o:p></o:p></p>
<p class="MsoNormal">…providing an expression that looks like this:<o:p></o:p></p>
<p class="MsoNormal"><img width="276" height="52" id="Picture_x0020_2" src="cid:image004.png@01D26D87.FB7A6240"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">But when I try to render the summation sign using this code:<o:p></o:p></p>
<p class="MsoNormal">$function = "$numer/$denom [pi + sum($sum_numer/($sum_denom_n_coeff n - $sum_denom_const),n,1,3)*sin($w nt)]";<o:p></o:p></p>
<p class="MsoNormal">…I get the following:<o:p></o:p></p>
<p class="MsoNormal"><img width="361" height="56" id="Picture_x0020_3" src="cid:image005.png@01D26D87.FB7A6240"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have spent a couple of hours looking through the Maxima Manual and other references, as well as some examples I have found online, but have not been able to figure out the syntax for rendering the summation sign. Can anyone offer advice
on how to do this?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Also, although not so important, if someone can tell me how to replace the outer parentheses with square brackets, and/or how to display the numeric part of the sine argument with commas (e.g., 90,000 vs 90000), I would really appreciate
it.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Gene L. Harding, PE<o:p></o:p></p>
<p class="MsoNormal">Associate Professor of ECET<o:p></o:p></p>
<p class="MsoNormal">574-520-4190<o:p></o:p></p>
<p class="MsoNormal">Purdue University-South Bend<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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