Mathcad

I have been performing drop testing with a product.  Collected data shows displacement during the freefall and deceleration to a stop.  I've tried several methods of data smoothing and curve fitting.  The best I have achieved gives incorrect initial velocity and acceleration.  In the image below, after smoothing (blue line), it shows an initial velocity rather an acceleration from zero.  Any ideas on how to accomplish my goal would be appreciated.  See the attached Mathcad Prime 9 document. Thanks, Bob 

Hello Community Members, I would appreciate your help in fixing the solution to a second order differential equation. I am attaching the spreadsheet I created in Mathcad 10.Thanks in advance for a timely feedback!Best regards, Peter

I have a program that I have written for a fixed time step and then advanced it for two, but obviously I want to do this for many. I thought I could just do this with a for loop but I have various matrix operations in the program and cannot get the indexing right. Do I need to convert everything to indicies? There must be a simpler, more elegant and efficient way. The program is highlighted and annotated at the bottom of the worksheet. There are some auxiliary programs at the top. I am using MathCad 14. (BTW I do have a reason for setting the ORIGIN to -N, but I do not think this is relevant). Thanks in advance for any help.

Hello I am want to use Mathcad to build  a mathematical model from several  physical formulas and later on substitute either numerical values either lower formulas. The 1st difficulty I meet  is that I would expect hereafter to get numericla result in the variable JSyst. Currently the error is "undefined variable". Another strange thing is the numerical resuls from the Solve command is not combining the unit. Is there a common explanation ? PTC Mathcad prime 9.0.0.0

Hi everyone,I want to do a linear interpolation for k in MATHCAD from this table taken from EC2.As you see, if the division c1/c2 is <= 0.5 the value must be 0.45 and if the division is greater than 3 k is equal to 0.8.How can i solve this. Nota: I'm new to MATHCAD.

Hi,unfortunately only v7 and above is still available under this link?Unfortunately my old hard disk with Mathcad v4 is broken and I still have a permanent license. How can I get a Mathcad 4.0 download? Regards  

I asked questions in the collaboratory several years ago, and as far as I can tell, many of those issues were never resolved.  How may I get my old Q&A so I can go through them and compare the issues to the newer versions of MathCAD? 

Well it looks like the Collaboratory has died http://collab.mathsoft.com/~Mathcad2000. Not even a redirect notice.It was good while it lasted.Philip

The Problem Has this happened to you?   You are involved in the development of a new process.  At this early stage in the development, the catalyst developer has some indication of success, but there has been no kinetic study conducted.  Thus, the reaction network is only partly known, if that.  Because the development team is following the Scale Down development method (see earlier blog article), you have been assigned the task of creating conceptual process alternatives using a commercial process simulation program.  This early process study may reveal information that may help the catalyst developer "tweak" the catalyst toward the more economical set of selectivities.  Also, getting an early start on the entire process design will help prepare for more focused optimization later in the development.   For the reactor model in the process simulation, you will be using the stoichiometric reactor option.  You have been given the list of reactants

Hello everyone, I require your expert assistance in setting up a 2D parametric plot to represent the geometry of a miter bend.The attached Prime 7 worksheet contains the formulas driving the plot. Although I utilized AutoCAD to sketch the miter elbow from the results from the worksheet, I need to recreate it in Mathcad through a 2D plot. The ultimate aim is to generate a DXF of the 3D object for import into the 3D design software but my first priority now is to achieve the 2D plot in MathCAD prime.       

Good evening, all.I am in the process of migrating some old MATHCAD 15 worksheet to MATHCAD PRIME 10 ones.I came across this vector field plot that MATHCAD 15 was able to plot and I found that the latest PRIME versions do not have such a plot type.I am pretty confident that someone in the community made some script to replicate such a function.I already saw some attempts made in other threads. However, they work for 2D vector plots.Any chance that someone did for the 3D vector plots as well?I am showing below the type of plot I am looking for.Thanks in advance for your time and support.Regards,Gianfranco  

Saw not long ago, methodology for plotting load, shear and moment diagrams-   Please point me in the right direction and thanks in advance.

Hi everyone. I have a mathcad worksheet that I am currently using to generate bending moment and curvature value through iteration.  In this worksheet, the input that I change is just OD, WT, and tconc. My previous input is OD = 323.9, WT = 14.3, and tconc = 120 and the calculation manage to work just fine. However, when I changed the input to OD = 663.2, WT = 23.8, and tconc = 40, the iteration gives an error of "This calculation does not converge to a solution". I'm curious on why this is happening and wondering if anyone has any experience on similar issue. Thank you in advance to anyone that helps out. I really appreciate it.

Dear PTC Community, I was recently working with a Mathcad Prime 9.0 worksheet that uses the Pdesolve function, but what I can't seem to do is define a first-derivative boundary condition (Neumann condition) in which temperature at the boundary is one of the arguments.  I get the error message "Bad algebraic constrain."  I've attached a zip file containing the worksheet.  If you can, please help me troubleshoot this issue, or else let me know that what I'm trying to do is not possible. Thanks for your time!--Bob

Good evening all. I have digitized some data points (see the 3D picture), in order to use interpolations in 3D.The data are arranged in a matrix with N rows and 3-columns, each representing a coordinate. I need to create a data matrix for the functions "Bicubic2D" and "Create Mesh". The idea is to sort the data by the Z values and for each of them retrieving the matching X and Y values. Unfortunately duplicate Z-values are found, but belonging to different set of X and Y values. I would need some hints if someone encountered such a challenge before. Thanks in advance for the help.Regards,Gianfranco

From Val Ochkov:   How to solve in Prime 9?

Hello,The problem is as following:Find currents through R3 and R1 and voltages of R2, R1 and C1 in below circuit: when:a)    b) 

Has anyone figured out how to plot a vector of points using the chart component in Prime?  It used to be so simple in Mathcad 15.

Could someone please convert this MCD file to XMSDIn my Mathcad the conversion is greyed out in Input/output.

Could someone help me to find the Area, CG and Second moment of area of a cross section using the two matrices SEC and CR.

I tried using symbolic to implement without success. Any hints on how I can implement this. and later use Laplace transformation?  

Hi,So i'm currently working on converting a worksheet from MC15 to Mathcad Prime and have ran into a problem with the conversion of MC15 "otherwise" expression to Prime "else" expression. The "else" in Mathcad Prime seems to only account for the last if statement but in my case i have multiple if statements ending with an otherwise statement. How would i go about converting this to Mathcad prime in the easiest way? See a dummy example attached. Kind regards,Johan

I wrote the same program in two different sheets , it shows error in the sheet which has more than one qcza vector values , but work perfectly fine in the other sheet which has only one qcza vector value. Can anyone tell me what I should do to edit that  

I need to use lookup function to specify the sand layer . I want to say if the value of qcza is between 5 and 25 MPa then the sand layer is in the depth that gives this range , I tried to do it , but I guess it's wrong    

Hi,Is it possible to display image with if conditionI would like to display the right side image if the left side condition is satisfied.Could you please advise.BR,J.Randeep