Mathcad

To allI am looking at the Dirlik calculation method for fatigue analysis/damage. The method is based on PSD moments and one of the variables is called the mean frequency (xm) (see below for definition). Does anyone know what this "mean frequency" is/represent?ThanksRegardsJXB

I recently put MathCAD 15.0 on my laptop. When I go to open MathCAD files created from my other computer (files created with MathCAD 15.0), the imported objects such as an excel header/footer are shrunk and the embedded autocad images are scattered. Even the right boundary page line seems out of place. In other words when I go to open the Mathcad files on my laptop, the display is different than what I'm getting on my other computer. The display on my laptop is not right. It's frustrating b/c I have many Mathcad files/templates created and they don't appear correct on my laptop. I could try re-sizing everything to fit nicely on my laptop screen, but that would take hours if not days to update all my files. Any ideas? I'm not at all a computer wiz, so I'm needing some help. Does this have anything to do with Adobe reader?Thanks

Hi,I have a Mathcad document that calculates a single value based on two input values. In between, there are a handful of constants defined, some preliminary calculations, 2 solve blocks and a couple of simple equations at the end. Its working great, but I need to do this calculation over and over again with different input values.I know you can define a solve block as a function, but is it possible to define an entire document as a function? If not, is there a way to bunch up a load of equations and 2 solve blocks into a single function?Many thanks!Oliver

It appears that it is not possible to find a derivative-operator in an equation and replace all instances of it with a function.You cannot paste the derivative-operator into the Find-field of the Replace-Window.Is there a trick?

I am wanting to produce a large data table in excel that gives me results based upon formula using 2 nested vectors (I hope I have my terminology correct).Q1: In my simple attached example I am firstly confused why this displays 1 x 9 and not 3 x 3? Q2: Nevertheless I have created an excel component in mathcad to display the results and typed the individual input variable and assigned it a cell reference. This is OK when I have only a 3 x 3 matrix but if this is say 40 x 15 this is isn't realistic.Is there a more elegant way I can do this for a large data set? My ultimate objective is to copy and paste a 40 x 15 data set in to a WORD document.

Hello,When my program calculates a batch, it stops somewhere and I want to know which case caused the problem. Could you please tell me how should I implement the trace function (or any other function) into my program?Thank you in advance.

Hello.I'm trying to derive a formula which is a function of six values. Four of them are just constants but the other two are vectors of three values.d = constantL = constantT = [T1, T2, T3]T_inf = constantE = [E1, E2, E3]R = constantI want to get three values from the dT_i. Thanks..

There is a request at Improve find and replace to be able to replace, say, TestVersion01 with TestVersion02 in Mathcad Prime. This capability exists in Mathcad 15. Simply type Test.Version01 in the Find box and Test.Version02 in the Replace box.(unfortunately, I can't comment on the original idea as I'm not on a maintenance contract).Stuart.

I like mathcad interface. I want to move some simple matrix calculation from Matlab to Mathcad?Does mathcad have these kind of fuction? Thank you!

AllI am happy to announce there is now a tutorial demonstrating how to push and pull parameters from PTC Creo Parametric to PTC Mathcad through the use of Input/Output tagging in PTC Mathcad and the Relations table in PTC Creo Parametric.Enjoy!

Hi everyoneI am experiencing for the first time with WAV-Files reading and postprocessing in MathCAD (15.0). I am using as base for myy first tests the Quicksheet: "WAV Files, Spectrograms, and Signal Generation", only the file reading and spectrum plotting part of it.I just want to ask if I am right in the assuption, that only 8 and 16 bit resolutions are supported. Because when I try to read a 32 bit WAV file, perfectly playable and correctly interpreted by GETWAVINFO, I get an errror message "this file contains bad information". A collateral question would be: is there a simple way to compute the signal to noise ratio of a given audio-recording? Or some other indication of the quality of the recording? Unfortunately I am no expert of audio-processing, but I do need to get some kind of spectral analysis on the WAV file.Thanks a lot in advanceRegards,Claudio

‌Why does the Mathcad blog say that Mathcad Prime 3.1 is now available and gives a link to a demo video of it but neither downloads exist?I have looked in the software download section of my subscription and it still shows Mathcad Prime 3.0 and the demo vides have no reference to Mathcad Prime 3.1. So it looks obvious that all will have paid maintenance for nothing. We don't even know how MC Prime 3.1 will benefit the average Mathcad user. My suspicion is not at all?Regards, Mark

As we draw closer to the release of PTC Mathcad Prime 3.1 I wanted to provide the Community a quick update on specifics. We have been targeting the end of January for official release, but as of today we are still investigating one set of issues with the Engineering Notebook integration with PTC Creo. I expect that these issues will have some recommended fixes from R&D by the end of this week, so we should know a more accurate release date by mid-next week. Assuming that this work doesn't have a major impact on the PTC Mathcad development team, we should be close to launch. Should the impact be greater than anticipated, I'll provide an update at that time.Brent

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I have performed a least squares fit on a data set and fitted a 21st order polynomial to the data. However, within the forum I could not find a good example of how to extract the polynomial coefficients. Since this is a 21st order polynomial automating the process would be the preferred way to go. From what I can garner through other discussions on the subject there may not be a trivial way to do this - am I correct? Anyway has someone accomplished this feat and is willing to alter my worksheet to show me how to do it. If not I may have to buy Curve Fit Expert but Mathcad methods are of more interest to me. Kind regards, Mark

HiI'm using prime 3 and I want to write a bisection method code but I'm getting an error as follow :1/ I can't write (i+1) as a subscript for the variable name.For this problem, I think I solved it by defining a new variable j as (i+1), but I'm not sure if this is correct or not ?2/ I get an error telling me that the (ai) variable is undefined !!Please help and see the attachment

I'm using a while loop to evaluate a function. Then variables of the function is output for graphing purposes. However, I get an error message of "This variable is undefined"? How do I get rid of this message?Thank you-

In Mathcad Prime 3 - without animation but with units

With Kepler's 2-d laws of planetary motionSee pleaseKepler's laws of planetary motion - Wikipedia, the free encyclopediaPS One more idea for Mathcad-clockOld Mathcad-clock - Re: Mathcad-clock for Windows

To allI am struggling to get the correct syntax to calculate the moments from a PSD. Can anyone point me in the right direction?Attached is the theoretical equations. I have a "discrete" input PSD (freq,PSDvalue) (from an input file which I allocate to mcd" vector") but cannot get the correct syntaxThanksRegards

To allI am trying to do a sanity check against a xls doc set-up by a colleague. It uses the xls function NORMDIST()The aim is to get the cum. Distribution for 1s, 2s and 3s (s=sigma) for a mean=0 and std dev. = 1The xls was set up as followsSigmavalue=1 a=2*NORMDIST(sigmavalue,0,1)-1Sigmavalue=2 b=2*NORMDIST(sigmavalue,0,1)-(1+a)Sigmavalue=3 c=1-(a+b)I believe the mcad function pnorm() does the same but I can’t quite figure out how to get the pnorm value for 1s, 2s and 3s withoutsetting up the same equations (see below). I f I do I get the same answers but I think there is a quicker way of doing ita=2*pnorm(1,0,1)-1b=2*pnorm(2,0,1)-1-ac= 1-(a+b)ThanksRegardsJXB

Hi, I need an advice with my problem... I make a static design of steel beam..and I want to read parameters(like A,Iy,Iz etc..) of steel cross section like HEA,HEB,IPE and others EN steel profiles from my excel table..I did it with READEXCEL argument but I think it is too complicate for me to make cca 2000 arguments ( *LOOK ATTACHED MATHCAD FILE) , because I have around 2000 steel profiles. I am looking for advice how to do it easier. And It is possible to show parameters for choosed profile in Table not in Matrix? I want to results look like table with 2 columns and x rows... in first column will be name of parameter like A,Iy,Iz, etc. and in second column will be value of those parametes, which will change depend on chosen Steel profile..My next problem is how to insert jpg. picture like matrix to mathcad??...Thanks for answers

I am using MathCad 11, which will not export to any known CAD format. There seems to be no DXF option for export, either.Are there any newer MathCad versions which will support file export in STEP or STL formats?Is there a work-around, or a third-party translator available? MathCad is still my favorite math/graphing application, but it is only useful for presentations, not for building physical models via CAD.Thanks,Steve

can you help answering the question using MATHCAD 15 in the attached photo