MaplePrimes - Maple 2018 Posts and Questions
http://www.mapleprimes.com/products/Maple/Maple 2018
en-us2020 Maplesoft, A Division of Waterloo Maple Inc.Maplesoft Document SystemTue, 04 Aug 2020 15:04:24 GMTTue, 04 Aug 2020 15:04:24 GMTMaple 2018 Questions and Posts on MaplePrimeshttp://www.mapleprimes.com/images/mapleprimeswhite.jpgMaplePrimes - Maple 2018 Posts and Questions
http://www.mapleprimes.com/products/Maple/Maple 2018
dimensionless dynamical system
https://www.mapleprimes.com/questions/230238-Dimensionless--Dynamical-System?ref=Feed:MaplePrimes:Version Maple 2018
<p>Hi everyone...</p>
<p>How can anyone help me in the attached file? I want to know how the equation of the system turned into a dimensionless</p>
<p>dynamical system?</p>
<p><img height="100px" src="/view.aspx?sf=230238_question/eq.png" width="100px"></p>
<p><img src="/view.aspx?sf=230238_question/eq.png"></p>
<p> </p>
<p> </p>
<p><iframe class="ginger-extension-definitionpopup" src="chrome-extension://kdfieneakcjfaiglcfcgkidlkmlijjnh/content/popups/definitionPopup/index.html?title=a&description=indefinite%20article%2C%20%22an%22%20is%20use%20before%20a%20vowel%20sound%2C%20%22a%22%20otherwise" style="left: 188px; top: 48px; z-index: 2147483646; display: none;"></iframe></p>
<p>Hi everyone...</p>
<p>How can anyone help me in the attached file? I want to know how the equation of the system turned into a dimensionless</p>
<p>dynamical system?</p>
<p><img height="100px" src="/view.aspx?sf=230238_question/eq.png" width="100px"></p>
<p><img src="/view.aspx?sf=230238_question/eq.png"></p>
<p> </p>
<p> </p>
<gdiv></gdiv>
<p><iframe class="ginger-extension-definitionpopup" src="chrome-extension://kdfieneakcjfaiglcfcgkidlkmlijjnh/content/popups/definitionPopup/index.html?title=a&description=indefinite%20article%2C%20%22an%22%20is%20use%20before%20a%20vowel%20sound%2C%20%22a%22%20otherwise" style="left: 188px; top: 48px; z-index: 2147483646; display: none;"></iframe></p>
230238Sun, 02 Aug 2020 21:10:56 Zfatemeh1090fatemeh1090Problem with `remove` command
https://www.mapleprimes.com/questions/230213-Problem-With-remove-Command?ref=Feed:MaplePrimes:Version Maple 2018
<p>Dear friends, please I would like to ask for your help with an odd problem I have using the remove command. </p>
<p>I have an array </p>
<p>A:=Array([1,4,1,7]);</p>
<p>and I need to remove its first element A[1]. </p>
<p>A:= remove[flatten](x -> x = A[1], A);</p>
<p>Instead of getting the result A:= [4 1 7] I get A:=[4 7], and I can't understand why. </p>
<p>Could you please help me with a solution to the problem? Many thanks for the help. </p>
<p> </p>
<p>Dear friends, please I would like to ask for your help with an odd problem I have using the remove command. </p>
<p>I have an array </p>
<p>A:=Array([1,4,1,7]);</p>
<p>and I need to remove its first element A[1]. </p>
<p>A:= remove[flatten](x -> x = A[1], A);</p>
<p>Instead of getting the result A:= [4 1 7] I get A:=[4 7], and I can't understand why. </p>
<p>Could you please help me with a solution to the problem? Many thanks for the help. </p>
<p> </p>
230213Wed, 29 Jul 2020 15:34:56 ZsantamartinasantamartinaSCI MODEL help with Equilibrium state and basic reproduction number
https://www.mapleprimes.com/questions/230189-SCI-MODEL-Help-With-Equilibrium-State?ref=Feed:MaplePrimes:Version Maple 2018
<p>Dear house </p>
<p>I am new to maple and will really appreciate some assistance in calculating the disease free , endemic equilibrium states and basic reproduction number for my model.</p>
<p> </p>
<p>I have been trying for weeks. any asistance will be much appreciated</p>
<p><a href="/view.aspx?sf=230189_question/SCI_HELP.mw">SCI_HELP.mw</a></p>
<p> </p>
<p>Dear house </p>
<p>I am new to maple and will really appreciate some assistance in calculating the disease free , endemic equilibrium states and basic reproduction number for my model.</p>
<p> </p>
<p>I have been trying for weeks. any asistance will be much appreciated</p>
<p><a href="/view.aspx?sf=230189_question/SCI_HELP.mw">SCI_HELP.mw</a></p>
<p> </p>
230189Mon, 27 Jul 2020 22:07:02 ZSuley83Suley83How do I find my unknown variable within a vector component?
https://www.mapleprimes.com/questions/230156-How-Do-I-Find-My-Unknown-Variable-Within?ref=Feed:MaplePrimes:Version Maple 2018
<form name="worksheet_form"> </form>
<p><a href="/view.aspx?sf=230156_question/Analisa_Dinamik_Limb_v1_(30).mw">Download Analisa_Dinamik_Limb_v1_(30).mwAnalisa_Dinamik_Limb_v1_(30).mw</a></p>
<p>So I have an equation that basically takes the component of vectors to be used as an equation. The variables that I after are FB1z, FB2x, and FB3y For example here is my equation: </p>
<p>EOM1:=(AFB1[1]+AFB2[1]+AFB3[1])=TEOM[1]</p>
<p>EOM2:=(AFB1[2]+AFB2[2]+AFB3[2])=TEOM[2]</p>
<p>EOM3:=(AFB1[3]+AFB2[3]+AFB3[3])-TEOM[3]:</p>
<p>FBBp1:=FBPP1=(EulP1[1]+EulP2[1]+EulP3[1]):<br>
FBBp2:=FBPP2=(EulP1[2]+EulP2[2]+EulP3[2]):<br>
FBBp3:=FBPP3=(EulP1[3]+EulP2[3]+EulP3[3]):</p>
<p>However there are unknown variable in AFB2[1] named FB2x and AFB3[1] named FB3y. Then AFB1[2] has unknown equation named FB1z and AFB3[2] has FB3y and so on. While in my FBBp1,FBBp2,and FBBp3 holds all of the variable of FB1z, FB2x, and FB3x<br>
I have tried to use 'solve' command to find the variable but my computer won't stop processing it:<br>
sls:=solve({EOM1,EOM2,EOM3,FBBp1,FBBp2,FBBp3},{FB1z,FB2x,FB3y}):<br>
<br>
I tried to use the Gauss-Elimination by forming a matrix but it doesn't work as well since I am really confused how to take out the variables out of the vector component.<br>
<br>
zzz:=Matrix([0,AFB2[1],AFB3[1],jjj[1]],[AFB1[2],0,AFB3[2],jjj[2]],[AFB1[3],AFB2[3],0,jjj[3]],[FBP1[1],FBP2[1],FBP3[1],EulP[1]],[FBP1[2],FBP2[2],FBP3[2],EulP[2]],[FBP1[3],FBP2[3],FBP3[3],EulP[3]]):<br>
GaussElimination:=(zzz)<br>
<br>
I would be very grateful If someone could help me. Thankyou</p>
<p> </p>
<p>Edit: here are the .txt files and .mpl files that required to run the program </p>
<p><a href="/view.aspx?sf=230156_question/Inverse_Kinematics_ADRIAN2.mw">Inverse_Kinematics_ADRIAN2.mw</a></p>
<p><a href="/view.aspx?sf=230156_question/RotInertiax0_ADRIAN.txt">RotInertiax0_ADRIAN.txt</a></p>
<p><a href="/view.aspx?sf=230156_question/DisplacementXYZ.txt">Download DisplacementXYZ.txt</a></p>
<p><a href="/view.aspx?sf=230156_question/inersia_platfrom.txt">inersia_platfrom.txt</a></p>
<p>There is an .mpl file that I couldn't upload so I will upload it in the comments</p>
<p> </p>
<form name="worksheet_form"> </form>
<p><a href="/view.aspx?sf=230156_question/Analisa_Dinamik_Limb_v1_(30).mw">Download Analisa_Dinamik_Limb_v1_(30).mwAnalisa_Dinamik_Limb_v1_(30).mw</a></p>
<p>So I have an equation that basically takes the component of vectors to be used as an equation. The variables that I after are FB1z, FB2x, and FB3y For example here is my equation: </p>
<p>EOM1:=(AFB1[1]+AFB2[1]+AFB3[1])=TEOM[1]</p>
<p>EOM2:=(AFB1[2]+AFB2[2]+AFB3[2])=TEOM[2]</p>
<p>EOM3:=(AFB1[3]+AFB2[3]+AFB3[3])-TEOM[3]:</p>
<p>FBBp1:=FBPP1=(EulP1[1]+EulP2[1]+EulP3[1]):<br>
FBBp2:=FBPP2=(EulP1[2]+EulP2[2]+EulP3[2]):<br>
FBBp3:=FBPP3=(EulP1[3]+EulP2[3]+EulP3[3]):</p>
<p>However there are unknown variable in AFB2[1] named FB2x and AFB3[1] named FB3y. Then AFB1[2] has unknown equation named FB1z and AFB3[2] has FB3y and so on. While in my FBBp1,FBBp2,and FBBp3 holds all of the variable of FB1z, FB2x, and FB3x<br>
I have tried to use 'solve' command to find the variable but my computer won't stop processing it:<br>
sls:=solve({EOM1,EOM2,EOM3,FBBp1,FBBp2,FBBp3},{FB1z,FB2x,FB3y}):<br>
<br>
I tried to use the Gauss-Elimination by forming a matrix but it doesn't work as well since I am really confused how to take out the variables out of the vector component.<br>
<br>
zzz:=Matrix([0,AFB2[1],AFB3[1],jjj[1]],[AFB1[2],0,AFB3[2],jjj[2]],[AFB1[3],AFB2[3],0,jjj[3]],[FBP1[1],FBP2[1],FBP3[1],EulP[1]],[FBP1[2],FBP2[2],FBP3[2],EulP[2]],[FBP1[3],FBP2[3],FBP3[3],EulP[3]]):<br>
GaussElimination:=(zzz)<br>
<br>
I would be very grateful If someone could help me. Thankyou</p>
<p> </p>
<p>Edit: here are the .txt files and .mpl files that required to run the program </p>
<p><a href="/view.aspx?sf=230156_question/Inverse_Kinematics_ADRIAN2.mw">Inverse_Kinematics_ADRIAN2.mw</a></p>
<p><a href="/view.aspx?sf=230156_question/RotInertiax0_ADRIAN.txt">RotInertiax0_ADRIAN.txt</a></p>
<p><a href="/view.aspx?sf=230156_question/DisplacementXYZ.txt">Download DisplacementXYZ.txt</a></p>
<p><a href="/view.aspx?sf=230156_question/inersia_platfrom.txt">inersia_platfrom.txt</a></p>
<p>There is an .mpl file that I couldn't upload so I will upload it in the comments</p>
<p> </p>
230156Sat, 25 Jul 2020 02:40:40 ZKendojiyumaKendojiyumaRemember tables and forget command
https://www.mapleprimes.com/questions/230133-Remember-Tables--And-Forget-Command?ref=Feed:MaplePrimes:Version Maple 2018
<p>Dear friends, please I would like to ask for your help with the following problem: </p>
<p>I have a remember table generated by a recursive procedure</p>
<p>x:= proc(n)<br>
option remember; <br>
....<br>
end proc:</p>
<p>It helps compute x(1), x(2), x(3), x(4). </p>
<p>After several additional steps I have a new x(2), say </p>
<p>x(2):= 3; </p>
<p>With this new x(2) I need to recompute x(3), x(4). I've tried </p>
<p>forget( x, [ x(3), x(4) ], subfunctions = false ); </p>
<p>x(3); </p>
<p>x(4); </p>
<p>However, I do not get the new values of x(3) and x(4) but the old ones. What could it be wrong? </p>
<p>Many thanks for your help. </p>
<p>Dear friends, please I would like to ask for your help with the following problem: </p>
<p>I have a remember table generated by a recursive procedure</p>
<p>x:= proc(n)<br />
option remember; <br />
....<br />
end proc:</p>
<p>It helps compute x(1), x(2), x(3), x(4). </p>
<p>After several additional steps I have a new x(2), say </p>
<p>x(2):= 3; </p>
<p>With this new x(2) I need to recompute x(3), x(4). I've tried </p>
<p>forget( x, [ x(3), x(4) ], subfunctions = false ); </p>
<p>x(3); </p>
<p>x(4); </p>
<p>However, I do not get the new values of x(3) and x(4) but the old ones. What could it be wrong? </p>
<p>Many thanks for your help. </p>
230133Tue, 21 Jul 2020 17:27:27 ZsantamartinasantamartinaSelect element of rtable
https://www.mapleprimes.com/questions/230104-Select-Element-Of--Rtable?ref=Feed:MaplePrimes:Version Maple 2018
<p>Dear friends, </p>
<p>I have to select the last element of a remember table T from a recursive procedure. I've tried </p>
<p>with(ListTools): </p>
<p>SelectLast(T); </p>
<p>as this command works with rtables, as it is stated in Maple's online help page. However I receive no result. </p>
<p>Can you please tell me how to obtain a correct result? </p>
<p>Many thanks for the help. </p>
<p>Dear friends, </p>
<p>I have to select the last element of a remember table T from a recursive procedure. I've tried </p>
<p>with(ListTools): </p>
<p>SelectLast(T); </p>
<p>as this command works with rtables, as it is stated in Maple's online help page. However I receive no result. </p>
<p>Can you please tell me how to obtain a correct result? </p>
<p>Many thanks for the help. </p>
230104Fri, 17 Jul 2020 19:12:24 Zsantamartinasantamartina