MaplePrimes - Questions and Posts tagged with coeff
http://www.mapleprimes.com/tags/coeff
en-us2015 Maplesoft, A Division of Waterloo Maple Inc.Maplesoft Document SystemTue, 01 Dec 2015 05:40:04 GMTTue, 01 Dec 2015 05:40:04 GMTThe most recent questions and posts on MaplePrimes tagged with coeffhttp://www.mapleprimes.com/images/mapleprimeswhite.jpgMaplePrimes - Questions and Posts tagged with coeff
http://www.mapleprimes.com/tags/coeff
Error when fitting function to data
http://www.mapleprimes.com/questions/207303-Error-When--Fitting--Function-To-Data?ref=Feed:MaplePrimes:Tagged With coeff
<p>Dear Maple users</p>
<p>Physical experiment: I dropped a ball with low mass from a height of approximately 7 meters and wanted to test if the air resistance was proportional to the square of the velocity. I filmed the fall and used the program Logger Pro to collect data: a number of datapoints (time,height) was collected. I copy/pasted the datapoints into MS Excel, from where I could import data into Maple via <em>Tools > Assistants > Import Data ...</em> Then I wanted to make a fit with the theoretical solution, given by a function having just one parameter: the Drag coefficient. Unfortunately I received an error "complex values encountered" (see below). I can solve the problem manual by making a number of guesses for the drag coefficient, until the theoretical curve approximates the data points well. I wanted to make Maple do the fitting job, though. I will appreciate if someone could give an idea how to fit the data properly.</p>
<p>NB! Mass m and g is defined above in the Maple document. The Statistics and plots package is called too.</p>
<p><img src="/view.aspx?sf=207303_question/mapleprimes_fall.png" alt="" width="567" height="384"></p><p>Dear Maple users</p>
<p>Physical experiment: I dropped a ball with low mass from a height of approximately 7 meters and wanted to test if the air resistance was proportional to the square of the velocity. I filmed the fall and used the program Logger Pro to collect data: a number of datapoints (time,height) was collected. I copy/pasted the datapoints into MS Excel, from where I could import data into Maple via <em>Tools > Assistants > Import Data ...</em> Then I wanted to make a fit with the theoretical solution, given by a function having just one parameter: the Drag coefficient. Unfortunately I received an error "complex values encountered" (see below). I can solve the problem manual by making a number of guesses for the drag coefficient, until the theoretical curve approximates the data points well. I wanted to make Maple do the fitting job, though. I will appreciate if someone could give an idea how to fit the data properly.</p>
<p>NB! Mass m and g is defined above in the Maple document. The Statistics and plots package is called too.</p>
<p><img src="/view.aspx?sf=207303_question/mapleprimes_fall.png" alt="" width="567" height="384"></p>207303Sat, 28 Nov 2015 16:45:38 Zerik10erik10Coefficients of differential polynomial
http://www.mapleprimes.com/questions/207267-Coefficients-Of-Differential-Polynomial?ref=Feed:MaplePrimes:Tagged With coeff
<p>Hello everyone,</p>
<p> </p>
<p>I am trying to extract the coefficients from a differential poynomial. In general, this poynomial is in two variables, say u and v along with their differentials, i.e D(u) or D@@2(u) or so on. </p>
<p>Coefficients of this polynomials are rational funcitons.</p>
<p>For instance- consider the following example:</p>
<p>a(x)*v*u+v*D(u)-D(v)*u</p>
<p>then output should be [a(x), 1, -1].</p>
<p> </p>
<p>Thanks for your help.</p><p>Hello everyone,</p>
<p> </p>
<p>I am trying to extract the coefficients from a differential poynomial. In general, this poynomial is in two variables, say u and v along with their differentials, i.e D(u) or D@@2(u) or so on. </p>
<p>Coefficients of this polynomials are rational funcitons.</p>
<p>For instance- consider the following example:</p>
<p>a(x)*v*u+v*D(u)-D(v)*u</p>
<p>then output should be [a(x), 1, -1].</p>
<p> </p>
<p>Thanks for your help.</p>207267Fri, 27 Nov 2015 14:34:53 Zshzanshzanproblem in procedure
http://www.mapleprimes.com/questions/207188-Problem-In-Procedure?ref=Feed:MaplePrimes:Tagged With coeff
<p>hello all!</p>
<p>Pascal := proc (n::posint)</p>
<p>local x, y, i;</p>
<p> for i from 0 to n do print(coeffs(expand((x+y)^i)))</p>
<p>end do end proc;<br>Pascal(4);</p>
<p> </p>
<p style="text-align: center;">1<br> 1, 1<br> 1, 2, 1<br> 1, 3, 3, 1<br> 1, 4, 6, 4, 1</p>
<p> How to create </p>
<p> </p>
<p style="text-align: center;">1<br> 1 1<br> 1 2 1<br> 1 3 3 1<br> 1 4 6 4 1</p>
<p> </p><p>hello all!</p>
<p>Pascal := proc (n::posint)</p>
<p>local x, y, i;</p>
<p> for i from 0 to n do print(coeffs(expand((x+y)^i)))</p>
<p>end do end proc;<br>Pascal(4);</p>
<p> </p>
<p style="text-align: center;">1<br> 1, 1<br> 1, 2, 1<br> 1, 3, 3, 1<br> 1, 4, 6, 4, 1</p>
<p> How to create </p>
<p> </p>
<p style="text-align: center;">1<br> 1 1<br> 1 2 1<br> 1 3 3 1<br> 1 4 6 4 1</p>
<p> </p>207188Wed, 25 Nov 2015 09:48:09 ZsunflowersunflowerHow to find linear combination?
http://www.mapleprimes.com/questions/207076-How-To-Find--Linear-Combination-?ref=Feed:MaplePrimes:Tagged With coeff
<p>assume there is vector a,b,c and d which are real number or floating number</p>
<p>how to express a in linear combination of b ,c and d</p>
<p>in another words, how to find coefficient m1, m2, m3</p>
<p>in a = m1*b + m2*c + m3*d</p>
<p> can LinearSolve do this?</p>
<p> </p>
<p> </p><p>assume there is vector a,b,c and d which are real number or floating number</p>
<p>how to express a in linear combination of b ,c and d</p>
<p>in another words, how to find coefficient m1, m2, m3</p>
<p>in a = m1*b + m2*c + m3*d</p>
<p> can LinearSolve do this?</p>
<p> </p>
<p> </p>207076Sat, 21 Nov 2015 03:07:57 Zasa12asa12About 'coeffs' and 'solve'
http://www.mapleprimes.com/questions/206866-About-coeffs-And-solve?ref=Feed:MaplePrimes:Tagged With coeff
<p> </p>
<p> </p>
<p>Assume that I have r:= -6x+3y+23x<sup>2</sup>-4xyz+7z<sup>2 </sup>. By using coeffs(r,x,'k') I can find the coefficients of 1, x, and x<sup>2</sup>. </p>
<p>What should I write to get the conditions that make the coefficient of x zero? How can I just pick the coefficient of x, and solve it. </p>
<p>I have several coefficients but the answer of this question will help me. </p><p> </p>
<p> </p>
<p>Assume that I have r:= -6x+3y+23x<sup>2</sup>-4xyz+7z<sup>2 </sup>. By using coeffs(r,x,'k') I can find the coefficients of 1, x, and x<sup>2</sup>. </p>
<p>What should I write to get the conditions that make the coefficient of x zero? How can I just pick the coefficient of x, and solve it. </p>
<p>I have several coefficients but the answer of this question will help me. </p>206866Thu, 12 Nov 2015 13:21:03 ZgurasgurasHomotopy perturbation methods
http://www.mapleprimes.com/questions/205463-Homotopy-Perturbation-Methods?ref=Feed:MaplePrimes:Tagged With coeff
<p><a href="/view.aspx?sf=205463_question/HPM_4.mw">HPM_4.mw</a>hi, I am using homotopy perturbation technique but there is arising an error in comaring coeffecient of p^0, p^1,.... plz help me</p>
<p> </p><p><a href="/view.aspx?sf=205463_question/HPM_4.mw">HPM_4.mw</a>hi, I am using homotopy perturbation technique but there is arising an error in comaring coeffecient of p^0, p^1,.... plz help me</p>
<p> </p>205463Sun, 13 Sep 2015 05:16:08 ZBobyBoby