Mathcad

Hi, I need a function that can characteris 3 sets of data. Ideally a function like this z=f(x,y). So X and Y are inputs resulting in Z.    The 3 sets of data consist of forward current, voltage and temperature measurments of a diode. 

Этюд 4. Решатели или Великолепная семерка Mathcad В этюде рассказано, какие средства есть у математического пакета Mathcad для решения уравнения и систем уравнений, какие есть уравнения, как они решались в докомпьютерную эру и как они решаются сейчас.   Файлы с задачами этюда в аттач здесь и в последующих реплика.

Please see attached Prime 4  file that I am stuck with.   I am trying to solve for two unknows and plot one of them.  Plot n.   I have had  success with one varible which I have attached as pictures in the mathcad.   Thanks  for all the  assistance that I know will be forthcoming.   Regards

Below is an example of an equation and its respective plot.  Everything seems correct and as expected.     Then I define a range... and the plot stops being valid below 1.     Does anyone have any ideas as to what may be causing such behaviour?

  Hello there, I have a problem to get multiple answers from this equation, It can be solved if put the value one by one,  kindly refer attached file for the problem. thanks in advanced    

  I have Prime 4 up and running.  To convert legacy files, I installed Mathcad 15 like is says it needs.  Both work fine. However, the converter feature just doesn't work.  Every legacy file I try to convert says converstion failed, process aborted.  No other info.  I have not gotten any legacy file to convert.  So far conversion to Prime has been a bust.  These are simple files, maybe a jpg image or two.  Very Frustrating.   Curt Fortenberry

I'm wondering if other users can confirm this issue.  Upon switching to 4.0 it has become difficult to get MC to define a custom unit.  I occasionally had problems in 3.0/3.1 - but nothing like this.  It only works about 10% of the time.  I can paste custom units from another file and they work, but can't define new ones with the label styles menu.  Also having similar issues with defining constants or functions.   Thanks,

Greetings all   I would like to simplify the expression in the attached worksheet (and image), however I am faced with the "out of memory" error, which occurs after about 30minutes of processing. I have 16GB ram, i7-4790 CPU at 3.6Ghz, 64 bit Windows 10, MathCAD version 15. Please note that all letters are variables, and I intend for none of them to hold any particular value. To avoid confusing MathCAD I have tried replacing e,i, and j by different letters, but to no avail.   I predict that the result will be in numerator/denominator form, with numerator having a sum of  x^2*y^2, x^2, y^2, xy, and the denomiator having neither x nor y.   Please would someone comment on the use of "simplify,max" and if it has any relevance to me.   Thank you kindly.

I tried converting a 7yr old MathCAD 11 spreadsheet to MathCAD 14 (then to 15) to solve a transient Heat Conduction Equation in Cylindrical Geometry. I used the old spreadsheet (attached) to evaluate at heatup of electrical cables from an external fire source about 6-7 years ago. The standard tools (Pdesolve, CreteMesh,..) don't seem to work in later versions of MathCAD.The current problem to be simulated is localized heat-up of a Tin foil via passing electrical current through a localized area with effective Radius Ro.The problem involves just one function: Ttin(r,t) - temperature as a function of radius and time, one initial condition, boundary conditions near the origin and farther away, and a time varying heat input source concentrated within Ro.The Pdesolve (....) block does not appear to generate an error message. I've tried all four of the curve-fitting solver options and cannot generate the mesh needed to generate solution plots. The Error Message is: "The number of functions m

I'm not sure what I'm doing wrong but Mathcad is taking far longer than I would expect to create simple arrays.   Goal: create an array with 86,400 rows, all values are 0   For example, I can make an array like that immediately with B[86400 := 0.   However if i try to do the same thing using a while or for loop it takes nearly a minute.    C:] t<--86400    ] j<--0    ] while j<t+1    ]  ] C[j <--0    ]  ] j<--j+1    ] C   Now the program I'm actually trying to write is a little more complicated but I need to write arrays/matrices using programs.  My current file takes 20 min to run which is far to much considering that the calculations are not intense.  I figure I must be making mathcad work harder than necessary.  What am I doing wrong?

Both in maths and in engineering texts, the  complex conjugated of a number or a variable or a function, is indicated with an asterisk. My attempt to create the new operator c.c. Is not satisfactory, as can be seen from the following picture: Can you do something better? Thank you very much! Francesco

Dear all,I'm facing an issue with 2d interpolation in Mathcad.The interpolating function results in negative, not plausible values.Could you please support you?Attached you find the file.Thank-you very much.Enrico

Did PTC decide that Mathcad 11 single user edition is not going to be registered online anymore?I did a reinstall on my computer with a copy I bought new. Mathcad 11 works fine and I am not willing to pay for a new edition.How do I register my copy, or is PTC offering a free upgrade with a supported activation line?

Hello,I don't know what has happened to my program. It was working before but suddenly it can't do the calculation and says "not enough memory for this operation". Can you please check and find the reason? All the bestPayman

Hi,Would anybody mind helping me why I could not have written 3d plot?

Hi,Would anybody mind helping me why I could not have written 3d plot?

This seems odd. I'm using a program to drop values into matrices.  It works wonderfully - until I get to a matrix 16 items long.  Then I get an error.   Here's a rather pointless example.  Suffice it to say it happens regardless of how many variables I return, or whether or not I use a matrix inside the program.  Tried it a bunch of ways to only get the same result: Exceed 16 rows and get an error. This version works fine:     And here's the same thing with one more row (r[i)    Thoughts? 4.0 attached. Thanks,

I have a few questions for our resident experts.  I am working on a sheet that I'd like to have use multiple solve blocks.  The first block feeds results to the second block.  While I can do it - I wonder if there isn't a simpler way.  It's rather cumbersome to set everything up this way.     I'm also curious about how MC works in regards to solving - as it seems sluggish.  Is MC solving the same solve block over and over every time I call the functions (e.g. When I solve for L(alpha) and K(alpha) does it solve the 2nd block twice and the first block 4 times)?     Here's a picture of a very simplified version.  MC4.0 attached.  (note: actual sheet is 18 pages with dozens of variables and I'm using multiple blocks because using one block has become unmanagable.  It also allows me to use existing calculation templates without merging calculations.)       Is there a better way? Thanks,  

Hello Community, Can anyone tell me, make the numbers by the black arrows show 0 instead of 10^-37? I've tried changing all the setting for number formats, but it doesn't really help:

Help Please. Thanks.

Hi,   I have to calculate the deflection of a shaft with some different loads. (a couple of Forces and line-loads like in the sketch below). The diagram of forces and bending moments i could calculate completely, but when setting up the boundary conditions and the ODE it's running into an error. Boundary conditions should be taken from the function for the bending moment.   Although i think i have set up all conditions completely, i can't display/calculate the deflection anyway. I think it's because of the forces which act at particular lengts and their definition in the solve blocks but i have no idea whats wrong.   Has somebody an idea? Thank you very much!   EDIT: I see more and more problems solving in good old MC15 hoping it lasts running for a long time.

Hello folks, MathCAD Prime 3.0 novice user here with a question. I am trying to duplicate example 51.4 from Lindeburg to determine the pressure resulting from a shrink fit betwen two cylinders. I have attached a .PDF of the problem. I have also attached a coply of my MathCAD Prime 3.0 file which I am struggling with.   To me, the problem involves solving a system of equations for "P". I have put the entire problem into a solve block but I am not sure if this is the correct approach. The three regions of the solve bloc "Guess Values", "Contraints", and "Solver" regoins seem to run together.   Any advice would be appreciated.   Best regards,   Bill  

Hi everyone! I am coding with Mathcad a worksheet that is supposed to generate the response spectra for earthquake data. I have achieved it using the Implicit Method, but when I use the Explicit Method (Central Difference Method) I get the message that there is a floating point error. Could somene please help me to fix this problem?  Thank you  

Hello!About a week ago I've received the following problem:   You have a ground fixed punch bag (resting on a spring that's attached to a counterweight).What is the minimum sensor setup in order to determine: the force of the punch in the bag acceleration of the punch the speed of the punches (for multiple punches) Notes: no sensor must be attached to the person punching the bag, only on the bag bag is punched in a limited vertical area Justify the answer with: sensors calculations Working as hardware engineer, I must admit I'm not that experienced with physics. I've been trying to figure a way to solve it for a week now. What I thought of is mounting an IMU in the center of the bag and after that gather experimental data by hitting the bag with a pendulum. What's hard for me to determine is the force with which the bag is hit, how much of that force gets absorbed by the padding and the remaining force that drives the bag afterwards. Finding the acceleration and speed o