Mathcad

I don't have a graphic calculator. I only have MathCAD 9.0.0.0. Is there a way to graph the following steps in MathCAD......or to solve for f another way. This is just an example problem. Once I learn how to do it, I can use it on my homework problem. Here's the full context of the example problem...Thanks,    Brent

Using the basic motor (DCPM) motor equation ...electrical and mechanical which have differential equations. I can solve the differential equations in a solve block. I want to create a sum squared error between the measured data and the model, and then using minerr to estimate the motor parameters. The measured data is Ia vs time and rotation speed vs time. But I cannot have two odesolve in one solve block. Can you help please... thanks. 

Hi there Can you help to reach a graph merged to the classification I have I have this graph and I did a classification to the data in this graph ... what I need now is to merge the classification with the graph and make them obvious layers and then find the average in each layer like this By obvious layers I mean > a program wil be able to say from z1 to z50 >> it is a sand layer and the average Q in that layer is 10 MPa ( as an example) Is that possible ? Thank you in advance .. the sheet is attached  

I want to fit my experimental statistical data, which looks very close to a Gaussian distribution, by a perfect Gaussian distribution. I'd like the amplitude, mean/center, width/signa, and background/vertical_offset to all be adjusted for best fit. I know that this can be accomplished using the genfit function; but I suppose others have already done this so that I don't need to reinvent the wheel. I'm running Prime 9.0.0.0.

Hi, I am new to mathcad and trying to input result from a formula as attached. However, the error red that stating the value must be a scalar and vector. How I can fix that? Appreciated to your guys response and help Thanks, Kala

hi wondering if anyone can give me any tips or help? I'm very new to mathcad and using it to create a compressible nozzle with multiphase gas-particle flow. I'm having trouble calculating the velocity of the droplets with an initial velocity of 1. when implementing with rkfixed the vd0 says 'unknown error-ODEtoofewinit'Any help would be appreciated if theres a better way to solve? thanks (g=gas, d=droplet)  

Mathcad Enhancement Proposal (MEP):  Extend the Document Spacing functionality to minimise the vertical or horizontal spacing between regions   The "Separate Regions" functionality is a useful tool for organising a Mathcad worksheet.  However, quite often I find myself "wasting" time doing the opposite - removing spacing between regions.    The usual scenario is that I write partial functions and/or evaluate them as I develop the final form of a function or set of functions.   When I've got the function in its final form, I delete the regions that are no longer required, which leaves me with the task of closing up the gaps their deletion leaves.  This is the kind of mindless activity best left to automation.   An additional button in the Document Spacing group to minimise region spacing, either horizontally or vertically, would be a useful asset to aid in this and other use cases.   Additional MEP:   MEP - Auto-increment spacing b

We just finished the Mathcad Virtual Conference 2022! Hooray! It was very nice seeing some of the PTC Community regulars in the Q&A.   I promised many people in the Q&A that the Design of Experiments in Mathcad Prime (Anji Seberino's presentation) and Developer's Perspective on Prime 8's Engine Updates (Anna Novikova's presentation) worksheets will be available on the PTC Community. (As well as the conference replay page and via PTC rep follow-up.) This post has those worksheets attached.   Also, please let me know what you thought of the conference! It was a massive effort to put together.   The replays-on-demand for the conference should be up at the conference page on Mathcad.com (see link in first sentence) starting by Sept 15 if you missed it.The raffle worksheet will be available a bit later in a Mathcad.com blog article. I'm going to start reaching out to the 25 raffle T-shirt winners next week, since I'm going on a vacation for the rest of this week.I kno

Hi all,  Can anyone suggest how to overcome the issue in the attached image. Currently using Mathcad Prime 10.  Kind regards,Iain 

Looking to provide a sequence number above both the ratio and check matrices, see attached image, to correspond with the check list above.  I work with Mathcad Prime 10. 

As the song says,   What a diff'rence a dalgorithm makes.Timing in secondsOr, by hours reckoned   While developing a function to convert an array into a set, I was shocked to see how slowly some of my algorithms performed.  After a bit of playing, I suspect that fold or stack handle nested arrays and some other data types differently than they do scalars.         Stuart  

Mathcad Enhancement Proposal (MEP) - Extend the scope of ℤ to include all IEEE 754 consecutive integers, where ℤ is the set of integers.   Mathcad's Is-Element-Of operator x ∈ y determines whether x is an element of y, where y is one of the sets ℂ (complex numbers), ℝ (real numbers), ℚ (rational numbers), or ℤ (integers).  Is-Element-Of works both symbolically and numerically (except ℚ in the latter's case).     When numerically evaluating x for membership in ℤ, x must lie between -231 and +231-1.  However, Mathcad handles numbers as 64-bit IEEE 754 floating-point numbers; thus, the full range of consecutive numerical integers in Mathcad is -253 and +253-1.   The maximum positive floating point real number, realmax,  is 1.7976931348623157×10308.     realmax ∈ ℝ and realmax + realmax×1i ∈ ℂ both return true (1).   Implementing this MEP wou

Mathcad was a pretty good tool. A quick and practical way to do your engineering calculations. That was version 9 way back and still my most used version. After that things didn't change much and together with some minor improvements, some issues came into being as well. I suppose their was no profit in leaving a program that worked just be what it was and so Prime came into being. And what a piece of junk it was. Slow, cumbersome and either lacking important functionality or simply not doing what it should.   Now on version 5 things should have been better. I mean, after eight years enough people should have complained that it didn't work. Right? Yeah. Too much to hope for. It's still slow, UI is still a mess, you can't comfortably input your work quickly and key features that worked fine as far back as Mathcad 9 still fail miserably.   As is the case with many programs, if any of the developer would actually have to use their own program for actual work, they would have kno

Hi, I'm having trouble finding the value of a variable using symbolic operations. Let me explain:I want to find the variable (theta) of a symbolic function within a range of valuesI'm using Mathcad 11

I'm using MathCAD 9.0.0.0. I get this error on my last equation... 

I'm using MathCAD 9.0.0.0. For whatever reason, MathCAD is having a problem with variable units of my final equation in my attached file. 

I'm using MathCAD 9.0.0.0. In my program I have the formula...I have every variable set in my program accept h2 that's in the equation twice. Is there a function to solve for h2? Otherwise, I guess I can rewrite the equation to solve for h2? Thanks,Brent

I attempted to use Mathcad Prime 11 to retrieve a Mathcad Prime 7.00 file I created but I could not. The file extensions appear to differ.  How can I retrieve this file into Version 11 without having to recreate it?  Thanks!

Hello, I want to create the  origin  function within a dropdown list (combo box) for an array index operation. Is this possible? I'm using Mathcad version 11

The values of a symmetric function f(x, y) are calculated and entered into a table using the matrix(m, n, f) function. However, taking into account the function's symmetry effectively doubles the computational effort. How can I eliminate this double computational effort while taking the function's symmetry into account?

Hi folks, My problem is a simple one - calculate the vertical overburden stress in a soil mass.  The simplified equation is just [ unit weight of soil ] * [ depth ].  However, in a layered system with a different unit weight for each layer, the calculation is best formed as the sum of the vertical stress increments. To me that looks like a stepwise function constructed as a series of IF-ELSEIF-ELSE statements as shown in my example below.  It works but there is surely a more clever way. Lets say the bottom of layer 1 is z1 and the stress is p1, and the stress at some mid-depth in layer 2, say z2, is delta_p2, such that the stress at the point in question is p(z2) = p1 + delta_p2.  What is the most efficient way of structing that calculation as a function depth (z) so that it can be scaled to any number of layers.  My best idea so far is an "If" function to evaluate the stress at the bottom of each layer plus the portion of the n-th layer at the t

I have a matrix and would like to obtain the product of rowi+1/rowi How can I do it?

I was playing around with sorting and decided (yet again) that I was frustrated by some of the restrictions.  One thing led to another, and before I knew it, I was hip deep in ways to "improve" the lookup functions.    While contemplating Mathcad Zen Principles 3, 6, 7, 16, and 17, I wondered whether "unique" would be a worthwhile addition to the match/lookup modifiers.     Then my mind went blank when faced with how to handle NaNs.  In principle,  IEEE 754 NaNs are distinct.  And they would be if a standard Mathcad user had any way to distinguish between them, but they're harder to tell apart than Zathras and Zathras.  To the Mathcadder in the street, they might as well be indistinguishable, for all the good their distinctiveness does.   So, I've written two versions of unique to cater for both cases.   The question is which one would a user expect to be the default (and hence all lowercase) version?   I'v

I can't seem to create a scatter plot using a Chart Component.   Is there a way to do this?   

Is there a way to re-read Excel Data that has been imported into PTC Mathcad using READEXCEL? At the moment the only way I know how to re-read the Excel data is to delete the following and re-import: