Mathcad

I've been trying to port a worksheet to Prime 1.0, but have got stuck because, whilst recursion is supported, local recursive function definition is giving me a problem. How does one define local function f to be recursive in the attached worksheet? Does it work in Prime 2.0?Thanks,Stuart

If I type the equation using variables, Is there a way to get MathCAD to automatically show the values in the equation before it calculates the answer?For example, I set the variables...A:=4B:=3...then I type the equation...C:=A+B=...then MathCAD automatically adds "4+3=7" so it looks like...?C:=A+B=4+3=7...Then if I change the variables...A:=23B:=45...MathCAD automatically updates...?C:=A+B=23+45=68

In my attached program, I'm getting the wrong value. The A value should calculate 6.01 mm... However, MathCAD 9.0.0.0 calculates 15.77 mmI double checked my numbers and ran them through a calculator and I got 6.0086. I presume I have the wrong units somewhere, but I can't figure it out. I attached my program for review, or you can look at the screen capture of the calculations below. Thanks,     Brent 

I have the following boundary and an angle with the origin  Pr and Mr are 1 x n vectors. I need to find, by interpolation, what is the value of Pr and Mr that correspond to the angle. what is the easiest way to do that on Mathcad?I am using Mathcad prime 9.0.0.0. Attached the file

In January 2024 the license file contained following INCREMENT blocks: INCREMENT MathcadPrime INCREMENT MATHCAD INCREMENT 254 INCREMENT 255 INCREMENT 256 INCREMENT 257 Today the license file contains following INCREMENT block, only: INCREMENT MathcadPrime License file belongs to old permanent locked Mathcad license bought in the distant past.   Can someone explain it? Maybe @DJNewman?

nu reusesc sa obtin perioada de 30 de zile gratuita la Matchadprime 11. Am nevoie de o licenta. Am primit pe email dar e doar un pdf si nici nu il pot deschide. Sau poate imi trebuie un key product de 22 de caractere care sa pot activa perioada de 30 de zile gratuita.

I'm using MathCAD 9.0.0.0. How come MathCAD is unable to solve these simple equations? 

See attached. I'm using MathCAD 9.0.0.0 and am having a few problems...Is there a way to put a bar above the variable Yf so it looks like ? I found something online about using the Windows Character  Map and I can copy the bar symbol, but it won't paste in MathCAD.The last few equations are showing values with a long trail of decimal places following "explicit,ALL." Is there a way to limit it to displaying only 3 or4 decimals? I set it in "Math Formatting > Results > Display Precision," but that seems to have no effect.Alternatively, is there a way to break long equations to have them continued on the next line? The following values are off...T=19.76*10^3 and it should be 19,786 N-m. That's only slightly off.P=1.3*10^6 W and it should be 207,201 N-m/s(W). That's way off.HP=1.744*10^3 and it should be 278 hp. That's way off. Is that all because of a rounding error, Something I did wrong, or is MathCAD misinterpreting one of my variables?Thanks,      &

In Mathcad 15, after selecting a portion of an equation with the spacebar, you could hit Insert on the keyboard to toggle between inserting before or after the selection. It doesn't seem to work in Prime. Is there a way to accomplish this, or do you just have to click closer to the beginning/end before hitting the spacebar?

While working on an answer to a question here in the forum, I noticed two bugs in Prime concerning the symbolics. I could not be bothered to report them the "official" way (too complicated, I am too old to be forced to jump through that many loops) so I post them here for your information and of course for PTC staff if they really are interested to improve their software (just joking...) Both bugs are already present in Prime 6 and still are in Prime 10.   Bug #1: Simplification of an expression using "floor" and the Heaviside function returns a wrong result! BTW, the bug is due to the 'new' symbolics. When we switch back and use the legacy symbolics (only available in P6 and below) we get a correct result     Bug #2 "clear.sym" does not clear a range variable. It should make it undefined for symbolic operations. "clear" works OK, but it also makes the variable undefined for the numerics. Interestingly the operation works as it should when a second variable is added

I have a vector of data points, and I'd like to be able to selectively plot just a portion of that vector. For example, I have a vector value:=[2 3 5 8 13 21] and I want to plot just elements 2, 3, and 4. I created an index:=[2 3 4] and tried to plot value[index on the vertical axis. I've tried both the chart component and the native plotting tool, and neither worked. The only way I've figured out how to do this is to write a mathcad program to fill a third vector with just the portion that I wish to plot, then plot that third vector. That's awkward. Can you tell me what I'm doing wrong?

I have tried multiple times to download the current version of MathCAD Express, but the system has never sent the promised "installation" EMail. I have requested help from sales, but no response. I've been using MathCAD since version2 in the 1980s, but lost access to the "home use" license when I retired a few years ago. I just need MathCAD now for hobby use, with no commercial or professional usage at all. The computer that the home use version was installed on is no longer functional, so I need a copy for the new computer. Most of my hobby stuff is in MathCAD15, some is in Prime 5-8. I am in your system as PJR51@live.com, formerly Paul.Rebstock@NRC.gov. The live.com account is still active, the NRC.gov account was closed when I retired. My cell phone is 240-393-3704.How can I get the current version? Can I install it on both my laptop and my Microsoft Surface?

Whilst writing a string replace function for Mathcad Express, I found what seems to be a problem with the string function search.   I wanted to check a string for the existence of the Unicode characters for 11 (↊) and 12 (↋) in the duodecimal system ... and it found them everywhere even when they weren't there at all.   Has this been noticed before?  Have I made some kind of error or unwitting assumption?     Cheers,   Stuart   (The simple recursive algorithm shown above is O(n) and only good for strings shorter than about 4000 characters (ie, under Mathcad's recursion depth limit.   A slightly more complicated algorithm would use a binary-division algorithm to reduce the recursion stack to O(log n), which will handle much longer strings)

If there is a way to display the values of variables inside a block in mathcad 15?

This file is in MathCAD 9, but I'm experiencing the same issue in MathCAD 10. I believe MathCAD is misrepresenting the units. See attached. "Hmp" and "TH" have the wrong values when comparing with example 11.2 at the bottom. I rewrote them as H and T next to them. I substituted "m" and "Ump" for the actual values of 100000 and 1035 and the answers came out correct. So, something is wrong with how "m" and "Ump" are represented.

Hi,Can anybody solve equation ? Solution is x =1, but Mathcad doesn't see this solution ...  

I'm trying to pass on a variable as a string to another mathcad Prime sheet.  VAY is a number defined above in calculations within the sheet.  I don't want the evaluated value but the variable itself.  There should be a function to do just that.  See screen shot.

I had to change to a new Computer because of updating to Windows 11. Content drive C: has been cloned. It is not possible to get the license again. Mathcad cannot be used. What can I do?

Hello PTC community,   Im contacting you regarding a reoccurring issue we've encountered with a license on a specific Host,   Since 25.08.2025 we installed Mathcad License(Prime 6 which is compatible with MathCAD 15) Locked version on our host.    The license activates the software and works as intended for couple of days, after that it's getting deactivated and has to be activated again (Activated 3 times already). We've followed the procedure as shown in PTC Knowledge Base and it has worked successfully on multiple other hosts. Only on this case we encountered this issue.   Kindly advise how to proceed & let us know if more information is needed.   Best regards

I have an old copy of Mathcad 15 and Prime3.0 installed on a Windows 10 computer which was purchased 2/8/2014 . I need Windows 11 licenses for both as I purchased a new computer.

I am using Mathcad Prime Release 10.0 and Datecode10.0.0.0My company uses Python scripts to extract Mathcad Prime data to Excel spreadsheets. The Python code uses the MathcadPy library to extract data to the spreadsheets, but I am continually getting errors when running the code. I have also seen the error popup when running Mathcad Prime normally.We create a folder structure of Mathcad Prime files, using relative links to point to the folder/file at the next level up. We have a number of Mathcad sheets in the same folder and they all point to Mathcad files at the directory above , to make a make-shift library of electrical parts/parameters for our application.I will randomly see the error pop-up when accessing these files. It is also random, and there is no predictability to the error popping up.Here are the errors that I faced"An unhandled exception occured. See .log file"Exception data:System.Exception: Lisp applying: CallNodeCallback {global} to Engine.NodeCallback, 1419, NODE_READ

Hello All, I have attached P10 sheet and an Excel sheet I am reading from. Many thanks to Werner and Stuart for helping me get this far. On page 12 of the Mathcad sheet, you’ll see the results of the axial forces and moments imported from the attached Excel file. On page 13, I’ve listed a couple of questions I need help with:1 How do I extract from the [TC axial Comp] forces of the panel forces (e.g. TC1, TC2, TC3, TC4, .... ) and place them into a vector labeled TC.Panel.Axial.Compr?2. How can I extract the [TC axial Comp] forces at panel points (TPP#), such as TPP3, TPP5, TPP7, TPP9, … and place them into a vector labeled TC.PP.Axial.Compr? Regards,Sam 

i have been a long time user of MathCad, strongly prefer the old, non prime versions.  Thinking of trying Prime once again, in case MathCAD 15 no longer can be made to work.  When to activate a newly downloaded, properly assigned locked licence, Prime does not seem to have an activated licence.  For example the watermark is there, the activate button is live, and not all functionality is available.  I'm not sure what to try next.  I've verified the MAC ID, downloaded new licence files a few times, tried on Windows 10 and windows 11 PC (of course properly assigning the MAC is in licence manager).  I also opened a ticket for support, that I have paid for for years and years and years, and have enjoyed no reply so far (about a week of waiting). Any tips?

Hello All, I have been manually inputting values from an Excel file into a table in Mathcad P10 sheet. I have attached both files. Is it possible to automate this process? I am interested in getting the values I highlighted in yellow in the excel sheet. Regards,Sam 

New to this Mathcad Prime here. Version 10.0.  I converted a sheet from Mathcad 15, In the converted sheet, every time I change the inputs I get question marks on the outputs and have to go back and manually type the uints over again. Is this a bug or can I solve this somehow. Thanks.