Mathcad

Hi guys,I need to plot some raw data (experimental) and a function representing a model on the same set of axes in order to compare accuracy of the model relative to the experimental data. I am able to plot each one on separate axes without any problem, however when I try to add the vector containing the raw data to the y axis of a plot of the function, I get an error that states "the value must be real".Please advise on how to resolve this.

Using the root function, I have plotted a graph to show the I-V characteristic of a PV cell which is characterised by the implicit equation:I=Iph-Io [exp((q(V+IRs))/akT)-1]- (V+IRs)/RshVarying any of the parameters within the equation is expected to affect the I-V characteristic in a particular way. The plotted graphs takes on the expected shape but when I try to change the value of temperature, the plot shifts in an unexpected direction. Increasing temperature should lead to a decrease in open-circuit voltage and thus decrease in output power, but the model I've plotted suggests the opposite i.e. an increase in temperature leads to an increase in open circuit voltage which contravenes PV theory. Short circuit current (current when V=0) has a (slight) positive temperature coefficient while open circuit voltage (voltage when I=0) has a negative temperature coefficient.In contrast, when I vary other parameters like , Iph, Io , Rsh and Rs, the results are consistent with PV theory e.g. in

Hello All,I need some help with MathCAD Prime 3.1.  I have a solution on page 3 that I would like to reference on page 1.  Is there a way to do that?Please help!

Upgrade of Power and Power Factor

Hello everyone,I have the differential equation m∙x ̈+C∙x ̇+k∙x=0 and i know only the mass, do you know if there is a way to find the coefficients C and K? do you think this can be solved with odesolve if i declare some initial conditions?

Hello,I need to solve a system of simultaneous equations to find reference parameters for a PV model. I have entered the same set of equations in Mathcad 15 and Mathcad prime 3.0. As far as I can see the equations are exactly the same in both worksheets. The problem I'm having is that Mathcad 15 is not returning an answer although I get a solution in Mathcad prime 3.0. I would like to resolve the issue in Mathcad 15 as I need to plot graphs and do some further analyses using functionality that is available in Mathcad 15 but not prime. I also have no way of telling which algorithm Mathcad Prime  3.0 applied to return the solution so I can't even replicate that in Mathcad 15.I also noticed that if I change the guess values in prime and then change back to original guess values that returned a solution, sometimes mathcad prime 3.0 doesn't return a solution also, no idea why. (Note that for a valid solution 1<a<2 but when I include this constraint mathcad prime 3.0 won't return

Hello everyone !I'm new Mathcad user and do not have much practice with the tool. I would like to help.Can anyone help me solve this problem with Mathcad?To determine the frequency of oscillation of the pendulum harmonic figure next toData :m = 5 KgK1 = 50 N/mK2 = 130 N/mmR = 10 kgR = 1,2 m Applying the solution by the energy equation methodSimply:Deriving and operating:Replacing variables:Simply:The expression of the natural frequency is thus:Thanks!

Getting the following error message when trying to activate Mathcad for student at Mississippi State UniversitySetup could not properly detect the host id that is required. 

Hi. I'm using MathCAD Prime 3.1.How do I type in temperature units °C or °F ? I know you can click on "Units" on the "Math" tab. But I'm hoping for a simple and faster way to type it in.There is probably a very simple answer to this question, but an hour of banging my head against the desk has not helped me find it.So, if i am trying to write "50°C" I try typing: 50 Alt248 C =This gives "50°•C=0.87*C"Hmm..., so it thinks I want degrees and then Coulombs.I tried many things after this and finally found a rather long way:50 * " Alt248 C RightArow Delete LeftArrow LeftArrow Delete =This gives me the correct answer: "50°C=323.15K" Does anyone know of a faster way to type it in?

I am trying to solve a set of equations using Given and Find.  I wish to define some boundary conditions. Eg. I may wish to limit some answers to a range between 0 and  1 or limit some values to positive numbers numbers. I don't know how. Your help will be appreciated. File is attached.Basically I am using current and voltage data from relays at both ends of a line to find a fault location.If we limit all values to real and  M is between  0 and 1 The expected answer for U  is about  0.75 - 0.76.

This worksheet will give the design of in-line cavity resonator used in my oscillator 45-years ago. The tube was 5893-pencil type or 2C40-lighthouse type. At that time there was no Mathcad available and it shows the difficulties in calculations without Mathcad. Later designs were based on microwave semiconductors based on Y/S parameters or Bessel functions for low phase noise. Enjoy reading.

This is an issue that I encountered earlier when I was taking an electronics technology course. Obviously, what is meant by a vector in Mathcad is not the same as what is meant by a vector in my physics text. Now, I'm sure that there is some system for manipulating and using polar coordinates, but to the best of my knowledge polar coordinates and vectors are not the same thing. Polar coordinates, by definition, do not have x-components and y-components. To resolve them would take as much work as resolving a vector. Isn't there some "inline" method of vector addition and subtraction so I don't have to keep resolving them?I have some (very basic) grasp of user defined functions. Is that the way to go here? Also, is there some way to typeset vector notation? (the horizontal arrow above the letter)?

Hello to all, I hope I can get some help here. I created a worksheet in mathcad for variational method.Actually I am know only the basic about mathcad. In my worksheet , the minimization couldnot be able to do, it take too much of time to do the minimization. Finally I am not able to get the answer.So please see my attachement and help me to get the answer. Thank you

  Hello, Everyone.       The Question is : How to solve vector v with elements are whole numbers ?             Thanks in advance for your time and help.                    Best Regards.

In the picture that I have added to this post there is an assignment where I have added four vectors.  In method one i have the lenght and a angle, but can I convert it to a coordinate?In method two I have the opposite problem my result Fres is a coordinate but can i convert it to a lenght and an angle?

Hi Mathcad'ers,It's been quite a few years since I last worked with Mathcad, and I don't remember if/how Mathcad could solve a system of equations with intermediate variables.The sheet that I have put together results in an error for undefined variables if I do not place guess values for the intermediate variable. Do I need to put a guess value for these?If I do set a guess value, I get an error that "this value must be a function".What's the best way of addressing this?The details for the sheet are:I would like to determine a,b,o,and q as a function of g and s (inputs).l,t, and p are constants.j,o1,o2,b1,b2 are intermediate variables.Thanks for the help,Raphael

ThanksDon Condor214.750.0944

Hi All,I couldn't able to get this solved by Mathcad.Can anyone explain to me why?

Attachments describe my issue.  Goal of program is to extract all relevant rows from a larger matrixCabDataCu for further analysis. The program is set to test for "0" in column 1 of CabDataCu and ifnot "0" extracts the row.   Programs works properly to ignore matrix rows below 5 and extracts 1-5.The problem that befuddles me now is that it misses, i.e. does not ignore or jump over matrix Row4 with a "0" in the first column.  I have tried several variants of the program statements and all haveended up with same result.  Any ideas?

Hi, Please find below the list of the Mathcad applications. Please confirm whether the below mentioned  Mathcad applications are compatible with Windows 10 or not. Mathcad Prime 3.0Mathcad 15 MO30 If the above versions of the Mathcad applications is not compatible with Windows 10 ,is there any upgraded version available for the above mentioned applications which is compatible with Windows 10  & will there be any cost incurred for getting the latest version of the application?Could you help us in this or please  help us in getting connected with the concerned person as this is a priority thing. Your response helps us in proceeding forward. Regards, Juhi Minsu Majeed

  Hi Helpers, The attached Mathcad Worksheet computes correct results.  It might appear long/complex.  However, the questions relate to the simple input of two variables at the very top of the worksheet and the simple 3-line Given-Minimize Block at the end of the program.  At the top of the program, the D and t arrays are parameterized with parameter OD1, OD2, and WT1, WT2, respectively.  Specific values of these parameters to minimize the function “weight” are sought in the Given-Minimize block at the end of the program.  Here are the questions:All parameters (i.e., OD1,…,WT2) must be provided explicitly in the minimize function of the Given-Minimize block. Array of parameters are not allowed. Could you please confirm and comment?All parameters (i.e., OD1,…,WT2) must be provided explicitly in all embedded subroutine calls in order to be optimized.  (e.g., Ao, which compute the gross section area at the top of the worksheet.)  Could you please co

Recently i got a question while using the mathcad file .my question is why calculating result is different between excel(before using exel solver's optimization algorithm) and Mathcad(before using Minerr function)? I know that after computing an "exel solver" or "Minerr function" their value would be apparently different, because excel solver is using an GRG algorithem and Mathcad is using other algorithm such as Quasi-Newton.  It looks same at a glance, but if you see carefully, their values are not same. And of course i put the same 18 parameter values in excel and Mathcad.

I am using Mathcad Prime 3.0 and I can't find how to paste inside a text block as plain text from i.e. Word to Mathcad.I was unable to find anything in this blog or the help documentation. Thanks!

Hi,I am a new MathCAD Prime user and I was wondering if it was possible to store frequently used equations so that I could call them back on screen. For example, if some one was working on fluids projects, they could insert the Bernouilli Equation easily without having to retype everything. Ideally this would display the equation and all the variables to enter known data into. Also, is it possible to insert data tables and interpolate between then as in a thermo problem requiring steam tables. This would be a great help to students. Thanks!‌