Mathcad

Hi!I just started using Mathcad Express Prime 3.0 and I can't understand what's happening to the units that I enter. For example, if I enter a variable d=370 km, it transforms in d=0.37 1/m^3 * km. I am sure this in some built-in setting that is supposed to help me, but right now it's really problematic for me. Could someone explain to me what I should do to change this?Thank you!Iulia

I am having a set of data that I have plottet in to a X-Y plot. But I would like to know the equation of these data, so that I can calculate the point where they are crossing each other. I have tried searching around both in this forum and other sites, but I have not been able to find a solution. I have attached both a jpg file and a mathcad file.

In the study a description is given for thermodynamic cycles calculations approaches used in refrigeration, air-conditioning facilities, heat pumps. Given the characteristics of cloud-based functions that support these calculations.

Hey,i would need another short help of you guys.I have an equation and need to solve it for a variable with the search(x) function. Now my problem is that i need to do it for many loadcases.I have given vectors for the variables in the equation and a given vector for the beginning search variable.How can i do it in mathcad so that mathcad is solving the equation for every row of the vectors.I have an given example in the mathcad file.I have problems here how to define the code 😞Best thx

I am using Odesolve to solve a set of equations. It works fine, but I want to make the solution depend on a parameter. I cant seem to get the syntax right. Or maybe something else is wrong. What am I doing wrong?

Greetings,I had created a test document to practice the CreateMesh and CreateSpace functions.This was done on one machine with Mathcad 15.Now, the CreateSpace will not  display on a different machine which also has Mathcad 15 and Prime 3.1.Any ideas as to why?If nothing is wrong with the set-up, what settings could make this behavior happen?The file is attached.Thank you for your time.P. Quint

Equations are as follows:The mathod as follows can only get a arithmetic solution rather than a  symbolic solution which is i want.How to get relationships like these in the mathcad ? Whether mathcad can do so cool things or not ?

I have already produced an acceptable finite differences approach in Mathcad, but it should in principle be a lot more laborious than using the PDESOLVE block successfully for the two equations (temperature and concentration). I have used Pdesolve just fine for single PDEs in the past.

Hi guys,My objective is to find LCC as close as possible to 1.Upon my Initial Guess Value of 1mm, it returns tcalc3 = 13.803mmsecond guess value of tcalc3 = 13.803mm,  returns LCC of 0.795 and tcalc3 = 12.3mmMy question is how can I make it as iterative, so that  I dont have to keep manually changing the initial guess value (tcalc3) to find LCC close to 1Thanks!!

Hi, All --The symbolic engine continues to disappoint...any ideas as to why MC15 is unable to solve the attached expression?Thanks.Matt

All --I don't have much experience solving ODEs in Mathcad, Any ideas why this doesn't work?FWIW, I know I can separate variable and just put the necessary equations inside of a solve block and Minerr it, but that produces its own set of problems, so I would like to try this. Obviously, the symbolic engine chokes on the integral, so we can't do it directly.Thanks in advance.Matt

Can anyone please tell explain to me why these two calculations give two different results???

In MathCad 15, is there a way to limit the calculation time, or implement a time out, for a solve block?  I have a parameterized solve block in which there are some values of the inputs that cause the solve block to run continuously (or at least longer than I'm willing to wait).I'd like to skip over those instances where it does this in the looping of the parametrized solve block and continue on to the next set of inputs in the loop.Thank You

Just trying to familiarise myself with MathCAD, and start the process of converting from Excel...As a practice problem, I'm trying to graph a functions which involves an 'if' statement: tractive effort (force) determined either by a maximum (limiting) value, or by dividing the available power by speed, whichever gives the lower value.In Excel I'd use a 'min()' function at each point, but this isn't going to work in MathCAD because it will look at the whole of my speed vector (for plotting) and find the single minimum value.  Therefore I'm using an 'if - otherwise' statement to define my function for tractive effort.  This works for any individual speed value, including a single index of my speed vector, but won't accept the full vector to generate a graph.At least the units seem to be behaving themselves!How should I be approaching this?

Hi I am trying to import the data which has both the string and numbers from testing result in mathcad prime 3.0 version but in mathcad 15 version, I can sort the data with rows and columns as enclosed file but no idea to sort the columns as 15version did. someone help me? thanks in advance!

I want the answer in matrix form (ofcourse)! Please help! In urgent need... and yes I am new to this!!

I'm having issues making Mathcad 15 remember unit redefinitions, this is especially a bother when using the explicit function.When I calculate a UDL from a pressure load (kPa x m = kN/m) Mathcad defaults the answer in kg/s^2. I redefine the units as kN/m which is okay, but when the variable is recalled, Mathcad returns the units to kg/s^2, this makes using the explicit function ugly. Any help?I've tried making the variable unitless and then reassigning it on the next page over but this doesn't seem to help either.Example doc attached

Hi,I'm using MatCAD 15 and have plenty of RAM. For deconvolution I use a program freely avaiable in the Internet, which runs smoothly on my computer, but after a relatively short time (3-5 min) the program stops working and gives an 'out of memory' error, probably due to an memory leak problem. Can sombody give me some tips avoiding this problem?best Jakob

I am working on a custom function and I would like it to return something like this:In MCADINCL.H, the only return formats defined are:// types to be used in declaration of the function's// arguments and of the return value#define COMPLEX_SCALAR  1#define COMPLEX_ARRAY   2#define STRING 8There is no STRING_ARRAY, is there a way I can do this?Something similar is done in this thread: import data with dat file and stringThanks in advance

Hey,community.I could manage so far the loadcaseprogramming but i have a problem how to get rid with the "NaN" value.At Page 8 of the mathcad file i need the smalest safety factor which i calculate out of the 5 Calculations.BUT WITHOUT THE NAN VALUE. When i do a minimum it shows me always a 0 when NaN occurs anywhere,How Can i write the condition with excluding a zero result?I just want to see the minimum safety factor without the zero.Is there a Possibility to comprimise my programmcode?Best thx 😃

Hey, i do have a problem with the following equation. I need to solve it and find the n value.But i have problems with the units. Can you guys help me?Best thx 😃

Hi all,I have been using  MathCad Prime 3.1 for some weeks: I recently implemented a solve block in which I defined a system of ODEs with guess values and initial conditions: the solution is calculated via "odesolve" function. Since I need to have the time and initial conditions as parameters, I was wondering how to define the solve block as a function, in order to recall it wherever within my worksheet.Does anyone know how to do this?Thanks a lot!Domenico

Dear Expert,Regarding EN_NR1 and NR2 loop statement (left two algorithm), I got a diifferent results from one of Maple software because I guess I might made some fault in the loop but I couldn't find out hence I need your support !!What I want to make in EN_NR1 and 2 is thatinitial value x1,x2,x3,r1,r2,r3  should be updated whenever Xnew evaluate from Jinv with for loop and while loop but It seem it doesn't work... on the right graph from maple software, the black curve doesn't excceed 200 value at y axis but my mathcad say the black curve(EN_NR2) excceed over 1000 value even though the input is same both maple and mathcad.hence Could you support me? Thanks in advanceP.S. My concern content will be located on last page in attached file

I know how to use solve to find an unknown character in an equation, but is it somehow possible to see the equation?I have attached a picture. I would like Mathcad Prime to give me the second equation by typing in the first one.Hope I made clear enough to understand.