Mathcad

Hi there,Any ideas why this is wrong? I made f as function of M in order to define it RegardsYusra

Hello everybody. I have a general question: How do I define the solution interval for the simple first/second  order DE?Example:The DE y**-9y = 0, has two solutions: y1=e^3x and y2=e^(-3x). How do I define the solution interval here? I need merely a simple explanation of how to proceed in order to find the solution interval (in general also). Linear independence:Question: What does it mean for the "real" world? What do we get by knowing that the solutions of a given DE is linearly dependent or independent? Best regards,Sergey

I'm planning to run Prime11 on a laptop Lenovo AMD Ryzen 7 4700U, 20 GBRAM 512SSD. MathCAD would run correctly, very well, badly? Thanks

Mathcad Prime 11 is ok with the units of atm and psi but has issues when trying to use bar and kpa in all but the SI unit system.   Why does these pressure units only are valid in SI unit system? For example, I get the following error messages when in CGS unit system: "This variable is undefined.  Check that the label is set correctly." When I switch back to the SI unit system it works and removes the error message.

Mathcad Enhancement Proposal:  Change Mathcad's numerical representation of infinity to the IEEE 754 floating-point standard.   When dealing with large numbers, representing infinity as 10^307 can lead to numerical errors and yield ambiguous or unreadable results.     Note: Python math, NumPy, Mathematica and Matlab all give correct results.   I don't know why 2^1020 is allowable, but 2^n, where n:=1020, raises an error.   Stuart   (Numerical ∞ = 10307 has annoyed me since Mathsoft Mathcad days.  At least change ∞ to ⧜ (U+29DC Incomplete Infinity)

Hi, I have a DLL with .Net Framework in c#. I want to integrate this Dll into Mathcad. I tried lots of method to integrate this but software didn't recogniz this Dll. I also add this Dll prime/Custom functions and the same file. I also make a wrapper dll with using c++ and add as reference this c# dll. But it doesn't work. Could you please help me?  

IMHO the first line should evaluate OK. Reason for Prime failing is because it automatically assigns the 0  an "appropriate" unit even though Prime is not using SUC (static unit check).  As a result, Prime naturally refuses to add 0 kg and the unitless 1. A unitless value different from 0 works OK as can be seen in the second line. Workaround (which should not be necessary) is using "zero" instead of "0".   There is no problem if the vector contains values of different dimensions or even      

MC15 allows a label to be added to an area, so when it's collapsed the label can be seen. In Prime 9.0 I can create areas but can't figure out how to add the labels.  In MC15, when I collapsed all the areas, the labels showed the analysis/calculation flow which is real nice. Is this functionality lost in prime? 

Hi,  I’m looking for help with a formatting issue in the footer of the attached document.As part of our design submission, we are including various calculations in the appendices and would like them to appear in an orderly manner. For referencing purposes, we’ve attempted to include the appendix number alongside the page number in the footer of each calculation (see attached example).Could you advise on how to align the formatting so that there is no visible misalignment between the appendix number and the page number? I am using Mathcad Prime 10.0.0.0 Kind regards,Iain 

 

Hello,I’m trying to linearize this type of curve using the simplest possible function: I tried many kinds of fits, but none of them worked.Do you have any idea how to do that?thank you, Emilien

Hello All,I have attached MC-P11 sheets. How can I  extract the segment lengths values "L" out of last iterations of this following function. There are two conditions as you can see in subsequent calculations:                            1. For Element B in Compression, comp="B"2. For element C in compression, comp="C""L" values can be different or same depending on above conditions  and  segment lengths.Regards,Sam

Hello,I'm using Mathcad Prime 11.I'm trying to solve a differential equation with conditional logic (if) due to the presence of a diode in the circuit.The input values are defined, and in the worksheet, some graphs are already plotted (e.g., I_TEST, VL1N). I'm using Odesolve to compute the solution. Is this the correct approach?It doesn't work with the following error "Plot failed"Cou you help me? Thank you very much

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