Mathcad

Hello everyone 🙂 I want to do exponential regression, I saw a YouTube source about it. Link https://www.youtube.com/watch?v=O0LbLATVboU&t=320s. However, I face some errors when I want to choose some value in a matrix. The error shown in the figure below pops up. Error: This array index is invalid. The index must be an integer, not less than ORIGIN, and not greater then the last element. Can you help me?  Note: I attached the Mathcad and Excel files.    

Hello Everyone.From :   How to plot an Arc in 3D with Mathcad 15 ?Thanks in advance for your time and help.Best Regards.Loi.

This should be simple.  I have an issue where I define an equation and get a useful result.  But further down in the mathcad sheet I just need to echo the equation that defines the variable to the user so he can make other determinations from the equation.  How do I do that?  See attached. I need the means to do this in Mathcad 15 and in Prime 8.0.     

How can I plot a circle in the X-Y plane, only knowing the radius and location of the circle center?I have Mathcad Prime 8.0. 

Hello, I can't get the two terms to add up. i can get the results individually. Attached is Mathcad 15 sheet. Thanks    

Is there anyway to display the result?  I'm using ptc mathcad prime 7.0.0.0

I spent a fair portion of my career taking measurements of experimental data.  When I first started the senior engineer would review the data and discard measurements that he deemed false.  Discarding data simply because you thought it was wrong struck me as very questionable and I spent a fair amount of effort developing a method (using T statistics) to identify "bad" data.   It turns out that there is a statistically rigorous calculation to do just that, developed (and published in 1852) by Benjamin Peirce.  That method is developed and demonstrated in the attached Prime 4 Express file.   Thoughts and suggestions?

Hello Everyone.From :How to plot the Fermat point of a triangle with Mathcad ?Thanks in advance for your time and help.Best Regards.Loi.

Hi experts,  this is my original equation, and I want to do the differentiate for every variable and simplify. but, I can only do it one by one, I think it takes me too much time if I have more variable in the equation. I would like to know any other methods could help me do it quickly. the attached file version is Mathcad 15. 

Dear experts,I have a question about curve fitting by using Mathcad.I have a formula call Steinmetz's equation. if I have a data like below figure.Based on the Steinmetz's equation, I want to solve the "a" ,"b" and "k" from each frequency.how do I use Mathcad to do the curve fitting.Could you please give me some example.       

Mathcad 15 has tools to align text or math equations horizontal in a straight line or vertical up or down.  See attached.  Is there a like set of tools in Prime 8.0?   

I'm having a hard time setting up the function to solve. Any help would be appreciated. I've attached a file of what I'm working on. I'm using MathCAD Prime 8.  

I am trying to solve a two point boundary value problem. Instead of three initial conditions for the problem, I am giving the value at the end of the solution interval. Can I use odesolve? My initial attempt (below and in attached worksheet) was not successful. If not what else? I have not solved this type of problem before. I know "shooting methods" are one possible approach, but I do not know how to set this up in MC. Any help would be appreciated. FYI I am using MC14, but saved the sheet as MC 11.  Thanks.  

In Mathcad Prime 8.0 the X and Y axis are reversed to what I normally see.  Y is usually up and down.  X is usually left to right.  Is there a way to reverse the Axis definitions?  

I am unable to get the evaluation of Derivative in attached worksheet.  How do I get it evaluated? 

Mathcad 15 would give me an indication that I was reusing a variable.  Prime 8.0 does not give any indication that the variable is used again.  Is there a setting to allow this feature?  See attached.  

Hello,From what I can see, the number of plotted points that can be displayed by the plot is limited at about 1.999998*10^6 points.                               The idea is that I want to extract from this matrix:   test(0) and test (1) from 5000001 - 2000000 = x and then plot the values of test(0) and test(1) from 3000001 to 5000001, and not how it is now happening that the plot is taking the first 2000000 values for test(0) and test(1) from 0 to 2000000 and above these values the plot fails.  Also the starting range for i in the for loop I want to remain at 0:

Hello. I am having troubles with the outputs when the range variable "n" is used (file attached).The range variable is defined from 2 to 6 with the step of 1. So there are 5 elements in 5x1 matrix.But at some point during the calculation I get more than 5 outputs (parameters L_e, A_e, X_e, I_e and Pg.What did I do wrong in my spreadsheet? I will appreciate any feedback. Best regards, Sergey   

I can utilize a hidden area, populate with text and math, and open and close that area.  Is there a way to work with the properties of the line that is shown once the hidden area is collapsed?   

How do I calculate the corresponding frequencies provided by the stft function?   

In Mathcad 8.0, how do you name an area?   

Hi all, I have an Excel file with thousand of cases. The inputs of each case are sent to Mathcad through its API, and the results are sent back to the Excel file. This process is repeated sequentially, solving each case one-by-one. As you can imagine, it takes several hours to finish all cases. I wonder if there is an option to use multithreading/parallel programming to solve several cases simultaneously and speed up this process. Also, is there an API command that returns TRUE or FALSE if Mathcad is busy calculating? At the moment I am waiting a fixed amount of time (15 seconds) between cases. Maybe I can ask each second if Mathcad is calculating until it is not and then extract the output values. Thanks!Regards,     

I'm getting a message, "these units are not compatible".        

I recently had my computer refurbished and am goin g through reloading my software. Mathcad 14 is not cooperating. I reinstalled, provided the code that came with the CD and uninstalled the license from the previous computer and redownloaded the new license file. The new license file has the correct HOST ID, but mathcad tells me that it isn't correct and redirects me to select a new file. ? COuld it be that the license fiel doesn't include Mathcad? can't understand why? Pleas

This month’s challenge is based on civil engineering:     Images created with Creo Parametric, Advanced Framework Extension, and Creo Simulation Live.   Scenario: You have a standard 300mm steel I-beam with a length of 12 meters. It is simply supported at one end and at 8 meters from that end. There is a load of 5000 Newtons in the middle and 10000 Newtons at the unsupported end. Calculate the cross-sectional area of the I-beam. Calculate the cross-sectional moment of inertia about the midpoint of the beam. (You may choose to ignore the contribution of the fillets. If you want the additional challenge, you may include them.) Use the Chart Component to display shear and bending moment diagrams. Calculate the deflection at the end of the I-beam.  You may ignore the effect of the fillets as necessary for shear, bending moment, and deflection.   Additional resources: Mathcad blog post by Brent Maxfield. PTC Community Shear Force and Bending Moment Mathcad work