Mathcad

Hi, Want to thank the PTC Prime team.  PTC do listen and fix things.  This only effects people with the Ryzen chipsets instead of Intel.   In Prime 8 any use of the matrix functions that use the intel math kernel (IMK) for matrix manipulation like Cholesky, QR, LU, eigenvals, eigenvecs, simple inversion would instantly crash the v8 program if you were on a Ryzen chipset.   PTC have listened and fixed it for Prime 9.0.0.0.   Thank you.   Cheers Terry

Help me.

Has anyone experienced this problem where NaN results appear and disappear for no obvious or repeatable reason ?  This is not a one-off event and appears to happen when working with large worksheets.  It happened a lot with Prime8 and it appears Prime9 is prone to the same issue.  On recalculating the worksheet and changing nothing, I get:If no one else has seen this issue then it might be a problem with my machine - although, I have checked the memory without finding any issues. Thanks GeoffD 

I congratulate all users of the mathematical (physical and mathematical) package Mathcad on the day of mathematics

Hello, my computer crashed last Night and ive been having trouble opening my mathcad file. I think it got corrupted. Any idea you Guys can fix it?

I have authority to buy a software but I don't have authority to buy subscription so if I buy a subscription based software then it is a mess for me every year to renew. For reference apparently Matlab is available in perpetual for around $2K How to buy perpetual license?    

Hi Guys, need your help!. I am trying to create a spreadsheet in mathcad to calculate shaft. So far, I've been able to create shear and moment diagrams for the kength of the shaft using singularity functions. Now, I am stucked in deflections and slope. I am considering Castigliano's theorem to do it without success.... Castigliano's theorem uses a Heaviside Function and dummy loads at any point on the length of the beam/shaft... First, I defined the heaviside function and then put into the moment equation but then I couldnt do the partial derivate of this equation with respect  the dummy load Q, so I had to do it manually (this way the spreadsheet is no longer parametric and will create errors if I change some inputs values). Then when having all the equations to go for integration, it seems that something is undefined..    do you think there is a fancy way to do this?. At this point I am bit frustraded I don't know where the problem is.. Another thing is,

Hello everyone!I have been using MATHCAD for decades, and since 2015 I have been working hard on MATHCAD 15 which I am enthusiastic about and continue to use. In view of a crash of the more than ten years old system on which it is installed, I tried to install MATHCAD 15 on a new machine, using the version stored on a pendrive. After installation and launch, it asks me for the license that I downloaded from the 2018 email attachment when I requested a new license. Unfortunately it is not recognized. How to overcome this obstacle? Thanks in advance for helping me.Greetings,    

hello.I want to use the simplified equation surrounded by the red line instead of the ( if function) , how i can make it work?thanks.

I have a legal 32 bit CD for Mathcad Prime 2 that I used for many years on my old laptop which had Windows 8 OS. Microsoft does not support Windows 8 anymore. So, I bought a new laptop which has Windows 11 OS, 64-bit machine. I also have legal 64 bit CD with Product Code for the Mathcad Prime 2. I installed it on my new laptop but having hard time getting the License Key. Therefore, I will appreciate if someone from the PTC or the PTC community could help get the License Key!      

hello. I am trying to make a combo box with multi choices of various equations depending on defined variables, the attached file will explain it very well.how can I make it work?thanks, 

In the attached Prime 8 file I'm trying to solve a problem I have invented in my head.  I have 2 metal plates, one is fixed and the other is moving toward the other very rapidly (e.g. 1000 mph).  The voltage between them varies sinusoidally at 60 Hz.  The air between the plates is assumed to breakdown at 3 kV/mm.   I want to vary the phase angle of the applied voltage and find the phase angle that results in the maximum voltage stress across the air in the gap.  But, I'm not sure how to find that maximum in MCAD.    

Using Mathcad 3.1 under Windows 10.  Mathcad refuses to plot a two-variable function even though it will plot the same one-variable function with the other variable fixed.  "Cannot plot this function. It must evaluate to real values."  What is going on?  (File attached) 

Can someone please explain how the right side (RHS) of the equation below represents active power (P)?                       Explain P: = PFUL*MVA + (MVA - PFUL*MVA) *i/N   given N = 2000, and I run from zero to N.        

Is PTC planning to offer in future versions of Prime backward compatibility with files created with Matcad 15?     

In attached file I'm trying to plot a function of time but am getting a "Replace complex values and NaNs by real numbers".  If I include units in my "t" range definition I can plot my second function.  If I exclude units I can plot my first function.  But not both at same time.  I can't see what is wrong.   

HiI get an error in the root function when a variable exceeds a specific number. See attached file.  Thanks in advance      

For x,y kind of dataset, it is required to perform numerical integration w.r.t. x'.The italiczied P represents Cauchy's Principal Value. Limits are from 0 to infinity.It was first tried to approximate the x,y data by combination of mathematical functions but didnot succeed as the data can not be modeled so easily and exactly.Apologies for not putting very clear image. I do not find any clue how to proceed on it. Thanks. 

I am analyzing a ground motion applied to a SDOF structure and finding the motion with Newmark's method. To accomplish this I have read the ground motion in with the readexcel function and then use a for loop to find the relative displacement, acceleration and velocity for each time step. The file used and the needed excel file are attached.     

Hello all, I recently got an error message when I opened Mathcad file, attached below. Error message saysAre there any means to resolve it? Thank you so muchKind regards   

Is there a way to get the plus minus sign ± into math field? I couldn't find it from the symbols list so I guess the only way of getting it into the document is to copy+paste. However, Mathcad doesn't allow me to paste it into math-field, only to text fields...

Is there an option to make default input type text and not math? I'm doing a machine design course and we have to use Mathcad to calculate the exercises. Majority of the document will therefore be text so it would be more convenient if it was the default option. Meaning that if I just start writing, it'd write text and not math. Math-field could then be activated using [ctrl] [m]

Hello everyone: I have a question about how mathcad prime handles the units in the background. See attached Mathcad Prime 3 spreadsheet for reference. Why does the top formula (i.e., the one where the variables have units) get a different answer than the bottom formula (i.e., the one where the variables don't have units)? Shouldn't it be the same since, in this particular formula, all of the units cancel out? And how is this program handling the units in the background? Does it use default units under the hood and then convert from those default units to whatever units you type in? Thanks in advance for your replies.

Hello there,I am new to mathcad and in my start I got a strange result: I am deviding a length of dimension m by a constant number and the result is not what I was expecting    H:=10 m soil layer thickness N:=5 number of calculation layers Dz: = H/N Dz= 400        

Does anyone know how to speed up MCP for processing large data sets? I am working with a 50832x14 size data set that is output in Excel from another program. I would prefer to filter, sort, and manipulate the data in MCP vs Excel. However, trying to execute a simple filter step in MCP on a data set this large has proven impossible. I can't get the function to complete (endless spinning wheel). Whereas I can complete this one step in Excel in about 1sec. Does anyone know how to speed this up? Or any other tricks for processing large data sets in MCP? I would really, really prefer to avoid Excel but at this point, I'll have to use it.Thanks!