Mathcad

Hello,   I am trying to work with my final solution but Mathcad is saying the variable is undefined even though it's being defined earlier. I have attached the file. Any help will be really appreciated.   Thank you, Faisal

any help would be appreciated with changes i need to make so the last formula on page 4 will calculate the individual values correctly.  

Hi,   I have been working on this equation and the worksheet works. Now I want to export rho_ms(w) and w to make a plot and be compared with the result from other program.     I have read about the vectorization process like in this https://community.ptc.com/t5/PTC-Mathcad/exporting-the-vector-of-f-x-y-function-into-matrix-or-table/m-p/569400 and follow one of the uploaded file. But I have this labeling issue. What I understand about this vectorization is we need to change our range variable into an indexed variable. what label should I put for that index i?if I use w(i), it is ok, but it comes back to a case of range variable, doesn't it? I tried with auto and variable, but still have error while one uploaded worksheet in the link above use auto and works. maybe i missunderstand something here. I attached the worksheet.I appreciate the help.  

Hi,   I need a help how to derive the graph . I attached all the reference and Mathcad  for your reference.    

Hi,   During integration with infinite upper bound, I found that the result makes me doubtful. Then I checked it by changing the infinite upper bound with a large enough number compare to other numbers in the equation. I got a more sensible result.   my question: 1. when should we not use this infinite bounds? 2. did I miss something here in my worksheet?    

Hello,   I need to find roots of a periodic equation by making initial guesses of x and assign the derived roots in "a". But, Mathcad is saying " the value must be a scalar". What does "scalar" in this case and how can I solve this?  I also need to sort "a" after assigning.   Thank you very much,   Faisal

I had to revert back to using freeware after hitting this snag with Prime 4.0... I don't understand what the difficulty is at step 5. Troubleshooting further down the page was successful after using new variables, so it seems to be a problem with my variables...   I even tried clearing the variables like my reference "Essential PTC Mathcad Prime 3.0" textbook suggests. Any help would be greatly appreciated in getting me back going... 

The … is for me an animations tools in first line! And for you? Tell us please!

Hello Everyone, How to correct the Pell(n) function ? ( for n = 181) Thanks in advance for your time and help. Regards.

Hi! I'm new to mathcad and trying to calculate some very simple equations containing symbolics and numerical elements. I know which answer to get, but simply can't make mathcad return the wanted result.   1/2 * cos(v) * p * L + 1/2 * sin(v) * p* L   I look for the result looking like: 0.67 * p * L   I tried searching for solutions for this but can't really find an answer, but it seems so simple that I can't possibly think that what I look for isn't possible?   Any chance there's an easy workaround?

Hi,          I am trying to solve the Kynch sedimentation process. For that, I need some help solving PDE with certain initial and boundary conditions. The objective is to get volume fraction (ϕ) in terms of height (z) and time (t). I am not really sure on how to go about doing this. It would be helpful if someone could take a look at it.   Thanks.

I am trying to solve a system of ode's that have gotten increasingly complex as I have added various effects. Everything was working ok until I made the last change (in attached worksheet, addition of the last term - in parentheses - in the expression for dp in the solve block). Now the worksheet does not even get past the solve block to the ode's. I dont get an error message. It just keeps calculating although I have left it for 30 minutes or so. The addition does not seem that complicated: the system is still linear for dv, etc. Did I do something wrong? Any advice?

Hi everyone,  I am new to Mathcad and I have 4 unknowns with 4 equations, each equations contains 2 unknowns, therefore all 4 equations are interlinked. See attachment for details.  My question is: I have used the 'solve' function to solve the equations simultaneously and am expecting the answers in a [4,1] matrix. However, that is not what Mathcad produced. Why is this happening and how should I solve it.    Thanks in advance.    kuay

  Hello, Everyone.   From :   ( image 1 )      Thanks in advance.

I'm probably doing something silly, but I can't seem to find it.  I set up a while loop but it always finishes on the 2nd iteration, when I know fully well it hasn't converged.  Prime 4.0 attached. Thanks!

In ancient times, there were some routines/functions on the old collab that allowed plotting of general text on plots by creating appropriate x-y vectors (or arrays) which plotted as the desired text. I searched my collection of various routines, but  didn't find any. If anyone has Mathcad 11 versions of these, I would appreciate their posting.   Thanks, Lou

One more problem

Hi guys! I need your help again 🙂 MC15 file is attached.  

Hello everyone! This is my first post, I'm glad to be here. Let's cut to the chase.    I have created  an objective function  which has 5 variables. I gave 5 constraints. Probably a typical problem. But when i try to optimize it with the minimize function mathcad spent all night calculating it and it did not come up with anything. I am new to this, so probably missing the point 🙂 I will be thankful for any piece of advice.

Hallo,   i have a Formula to calculate the elastic plastic transition diameter for autofrettage:   Dp is the elastic plastic diameter. The problem is i need to plement the calculation for DP into microsoft excel. I need a formula to directly calculate DP. Now im using the solve function in excel but the solver is not trustable and does not give always a result where a result is calculateable.   Is there a way to transform the equation so that DP=..... for microsoft excel?   Transforming gives this block in Mathcad   where RE Yield Stress @20°C Di inside diameter Re Outside diameter   lg Stefan

Hello ...I wrote this message three weeks ago:I have a Student Licence of MathCAD 15.0 at Windows 7. The System where I have installed Mathcad has crashed. How can I reinstal MatCAD? Further, I want Install Mathcad 15.0 update at Windows 10.I'm thankful for any help.Regards JurgenI have got a response from this community:You can submit a support request in "Academic Case Logger", here: http://support.ptc.com/appserver/support/academic_case_logger/academic_case_logger.jspThan, I have called up the link, filled out the form and received an answer:Hello,As a University and estore Mathcad support, you have access to our commercial tech support team. For support inquiries, please file a support ticket. You will need your Sales Order Number (SON) or customer number to submit a ticket. Instructions can be found here.If you don’t know your SON or Customer Number, please contact academicsuccess@ptc.comRegards,Abdul Than, I have requested a SON and I have get the followed response:Could you tell

May be it is new art form! What can you say about it? AnimationA picture for Mathcad sheet in attach

Hi everyone, I'm trying to solve this EDO system, finding the solution for x(t) and p(t) with {k1,k2,b} symbolic variables and m=535: System Equations: m*x''(t)=-k1*(x(t)-p(t))-b*(x'(t)-p'(t)) k2*p(t)=k1*(x(t)-p(t))+b*(x'(t)-p'(t))   Initial Conditions would be: x(0)=0 p(0)=0 x'(0)=6.3   Already tried with Wolfram Alpha and Matlab, both giving solutions with terms "Root[#1^3+ (k1 m + k2 m) #1^2 + b^2 k2 m #1 + b^2 k1 k2 m^2&, 1]" in which I don't understand what is represented. Examples attached in following pictures:   Matlab:      

Hi, my solve block is returning a symbolic result rather than a number. What do I need to change to have it return a numerical result? Thank you.

Hi,   I'm trying to make a template that can be used for circuit analysing using Laplace transform. Everything works except that the input signal is not repetitive for a certain number of periods (or continous).   I tried to make an incremented version of the input signal function but it doesn't work. Tried with a "for loop" and the same result. Maybe I don't use it well because if I give a certain time period for t the signal goes forever. I found how to make a periodic function with "mod" or "floor" functions but if I apply Laplace I don't have a good result.   The input signal is a PWL signal and a LC circuit, but you'll see all the details in the attached document. So my question is how to make the input signal repetitive for a certain number of periods.   I use Mathcad Prime 4 or Mathcad 15.   Best regards.