Mathcad

One my little hobby is... clocks with one math sense! One example - a salesman problem clock!   

Hi folks,   I am trying to solve a second order differential equation in Mathcad 15 to model the diffusion of a substrate in a spherical pellet. Regrettably, Odesolve gives me the following message: 'This function cannot be used here' (see attached file). I have tried to rearrange the equation in different forms to see if that helped, but I still have the same problem. Do you know how can I solve the issue?    Best, Daniela

Hi, I'm a student and am unable to locate the Mathcad Prime license required to dual authorize the Mathcad 15 program. Per PTC instructions this file is "MathcadPrimeLicense.dat" in "C:\ProgramData\PTC\Mathcad Prime\license\directory" and similarly in forum discussions has been listed as "C:\ProgramData\PTC\Mathcad Prime\license\MathcadLicense.dat". Presently, althought I have successfully licensed Mathcad Prime, there is no "*license.dat" file that I can locate on my computer and the only files under the "C:\ProgramData\PTC..." directory are "Windchill sharepoint products" and 'PTC places NamespaceShellExtension". All other files reside directly under the "C:\ProgramData\Mathcad..." directory, but, nowhere can I find the license file.I purchased an HP Laptop with Windows 8 just yesterday (subsequently upgraded to the Win8 "pro" version) specifically to run Mathcad for a class. I have homework due soon, so, any help I can get in getting Mathcad 15 running would be most appreciated.Than

Hi, I am trying to solve a beam bending problem. My end goal is to solve a problem with more complexity, but for now I have simplified it so that I can make sure I understand how to use MathCAD. See the sketch below. I have a cantilever beam, supported on the left (at x0=0) it extends to x1. The Support reaction loads can be described as M0 and R0 which I am trying to solve for. The end of the beam is being deflected by Y1.   I have set up a solve block in MathCAD (Prime 2.0) as such:   But I get all sorts of errors. I've been reading about different solving methods including odesolve (I guess this could be seen as a really simple ODE, as well as symbolic calculation, but I haven't gotten any to work! Can anyone help me solve this? See the Sheet attached for the example. Cheers, Raz      

Hello, I want to find the function from 2 variables according to table data I have:    c t=16 t=25 t=50 t=75 0 4925 4511 4277 3845 20 4148 3975 3888 3564 40 3759 3672 3560 3327 60 3802 3586 3327 3111 80 3880 3664 3370 3025 100 4018 3698 3435 3089 120 4113 3802 3543 3240 140 4269 3932 3694 3435 160 4537 4104 3888 3629   I read a lot of info at this forum. I found good posts from @ValeryOchkov about the interpolation algo from 2 variables. I did it, but don't know how to get the function.    I attached a file with my experiments.  @ValeryOchkov maybe you can help me?   I am a newbie in Mathcad Prime, so please help me how to find the analytical function F(x,y) according to that data. Thank you in advance!

Hi there,   I have the equation below which Vout and Io are variables and I need to isolate Vout from the right side of the formula, but the function is too large to display.     I could manually isolate Vout, but I found a third order equation that again MathCad could not solve...    The problem is that I have two variables, Vout and Io and I have to plot a graph of Vout/Vin in function of Io.

Find the maximum value from a list of data and  also the value that results in the maximum data.   I have attached a mathcad prime 5 file and pic if you dont have Prime 5    

Hello,   I need the solution for the problem shown in the attached photo asap.  Thanks in advance.

Hello,   I have this problem which says Plotting failed. Replace complex values and NaNs by real numbers. Although I identified the units and the parameters. Need help ASAP please.       Thanks in advance.

It is animals and Mathcad sheets of the article "New ellipse or math porcelain service" Fig. 2   Fig. 7   Fig. 11.      

If you have nested range variables, which loop gets executed fastest? For example in the following the trace indicates the inner loop gets executed fastest, but if you swap the a and b lines, the outer loop loop now seems to be executed fastest???  

Hello,   I need the solution for the problem shown in the attached photo asap. Thanks in advance.

If it isn't obvious from my subject, I'm using Prime 5.  I've run into a few issues where a partial derivative will incorrectly evaluate both symbolically and numerically as 0.  I've attached two files, both are pretty stripped down just to illustrate what I'm seeing.    The first, derivative_error.mcdx, illustrates the issue with a fairly simple example. You can see that the derivatives with respect to the first two variables are correct but the last three evaluate to 0.   In the second file, derivative_error2.mcdx, all I did was rename essentially everything and the issue magically disappeared.  This has been my only method around this issue to-date.  Move a piece of my work to a different file, play with variable names, eventually things start working.  I've never been able to fix the issue in my original file though.     I've searched this forum quite a bit and haven't seen a similar issue.  I'm either doing something real

Hi,   I'm new to mathcad and I'm sure this is an easy thing to do but I can't for the life of me figure it out from documentation and existing threads.   All I'm trying to do is simplify the results of a symbolic evaluation. Right now, MathCAD is returning this:   It's pretty obvious that the RHS is equal to 5.758*F0/in^2. There must be a way to get MathCAD to return this simplified form of the expression, right? Can somebody please show me how to do that?   Similarly, I have another expression in which MathCAD expresses units as in^2*psi.   It would sure be nice to display those units as lbf. Does anybody know how to do that?   Thank you!

Greeting, I wanted to plot a function which is the addition of a sine wave and logarithm base e but I couldn't get it to work. Can somebody help me? I am new to Mathcad, please bear with me.

Hello all   I'm trying to get the indices of values in a vector that are less than or equal to a threshold value. From the documentation, it seems that I should use match(threshold, vector, "leq") but this gives the error "This function accepts at most 2 arguments but is applied to 3". The relevant code snippet is below.   I've looked at the docs and forums but can't find any code examples using the third argument as specified in the docs. I've tried "leq" with and without the quotes.   I would really appreciate any help! What am I doing wrong?  

Hello. I am trying to extract values from a matrix according to certain restrictions, with no success! In the file attached is the attempt. Any help would be greatly appreciated. 

See please here Mice problem about this task! You can see in attach a Mathcad 15 file with solution of this problem. But I think that will be better to use not a X-Y system but a Polar system of coordinate - for the calculation and for the plotting - not only for 4 animals but for 3, 5, 6 etc. Help me please!  

  How do a allocate a variable to another variable based on conditional check? Attached a picture and Mathcad Prime 4 file. Thanks.

Is it possible to set the default behavior when double-clicking an MCTX (Mathcad template) so that a new file is created, instead of opening the template itself? You can do this with Word, Excel, etc. Wondering if it's possible to do for Mathcad as well.

Hello,   I have a working simulation worksheet that runs a Monte Carlo analysis on a function.  With the results, I can bin the simulations for the input variables as well as for the output.  I am struggling though, to find references on how I might "tease" out the relative contribution of sources of variance.     Are there any suggestions for using the input function, along with known means and standard deviations of the input variables to establish these values?     Is there an analytical way to look at the result of the Monte Carlo simulations and determine relative variance?   Sorry for the abstraction in advance...I attached my Monte Carlo simulation up to this point, but couldn't even begin to try and "mock up" what I am asking for help with.

Hi everyone,Qucik question for all you MathCAD geniuses (or is that genii?) out there.Is there any way to redirect where MathCAD 15 looks for its templates?As in most offices, we're on a network. There are several engineers in the office and to keep a tight control on documents, we all use the same template whenever we start a calculation. But it's very tedious having to open up the template document from the server everytime we want to create a new document (especially as we use Meridian which seems to make you wait for no particular reason sometimes) It would be much easier using the "new" drop down menu and going straight to it.I've tried creating a shortcut to the template document then droping the shortcut in the template folder on my C drive (C:\Program Files (x86)\Mathcad\Mathcad 15\template\EN) but to no avail as MathCAD doesn't seem to recognise shortcuts when starting a new document.I'm just looking for a way to either make MathCAD look at a different folder to the deault tem

Hello,    I want to solve an equation with vectors symbolically. The equation itself can be solved symbolically by Mathcad. The symbolically result of the equation can not be shown, but it can be used if I assign the equation to a function.  Now I want to use vectors with many data to get a solution for my unknown variable xB. I tried to use a Control variable i, but that did not work. If the values are inserted into the equation directly, Mathcad finds two Solutions. So my Question is if someone finds a way to get a solution for xB and even if it is possible to solve an equation with vectors symbolically?  The file is attached below.   Thank you for your help!    Christina  

In attachment can be found "What's New" PDF guide for Mathcad Prime 5.0 release.

Good morning everyone,   I was trying to print my results and I noticed that the lines are shifted in the PDF (see image attached).   I tried several printers but always the same result.   Anyone knows how to fix this?   Thank you for helping,   F.