Quantcast
Channel: PTC Community : Popular Discussions - Mathcad Usage
Viewing all 1503 articles
Browse latest View live
↧

Can I get Mathcad 15 if I buy a Mathcad Prime 3 now?

January 14, 2014, 12:25 pm
$
0
0

I'm taking a school course which uses Mathcad, and most of the materials were made by Mathcad 15. I heard previously people were having trouble using Prime 2.0 during the course, and they switched to Mathcad 15 using the same licence or something. So what about Prime 3? Can I have access to Mathcad 15 if I buy a Mathcad Prime 3 now?

 

Thank you.

↧
Search

Value cannot be null. Parameter name: pUnk

November 6, 2008, 10:23 am
$
0
0
When I try to input a file into MathCAD 13 I always get the error "Value cannot be null. Parameter name: pUnk". I tried to repair the installation and do a reinstall but nothing works, I am running Windows XP.
↧
↧

Unable to create 12.0 engine factory' error

August 13, 2008, 12:00 am
$
0
0
Hello, I am troubleshooting an installation of Mathcad 13.1. When launching from the machine with the installation there are no problems. However, This machine is on a network and the goal is to allow user client machines to launch the application served by the machine with the installed version of Mathcad 13.1. When a client machine tries to launch Mathcad from the mapped network drive the error "Unable to create 12.0 factory" is displayed. Has anyone any experience running Mathcad locally on a client machined from a server with this error? Any insight would be greatly appreciated.

Thanks in advance!
↧

Eliminate duplicate data

July 17, 2001, 12:00 am
$
0
0
I have a simple problem that is confusing me a little bit. I have just taken data from a fluid dynamic application and for some reason or another, the acquisition system output random duplicates of data points. . . like this
x y z
1 2 2
0 2 3
0 2 3
0 2 3
1 4 5
1 4 5
3 2 1
2 4 5
2 2 2
2 2 2
. . .


I can't seem to figure out how to have mathcad eliminate those duplicates. They are right after each other.

Anyone have any ideas?

Matthew Pittard
Space Dynamics Labs
↧

Defining a symbolic piecewise function

March 3, 2007, 12:00 am
$
0
0
I'm taking a Fourier Analysis course using Churchill 's Fourier Series and Boundary Value Problems, 6th ed. I'm trying to do problem 3, section 24.

I need a way to define a piecewise function that will work with the symbolic processor in Mathcad 13.

The function is f(x) = 1 if 0 < x < pi/2 and f(x) = 0 if pi/2 < x < pi.

I am assuming that my lack of familiarity with Mathcad is preventing me from seeing a way to define this function. I would use the Heaviside Step Function, but I don't know how to exclude the values pi/2 and pi from the range.

Does anyone have any ideas as to how to define this function?

Thanks in advance.
↧
↧

Is there a way to wrap equations to page width?

December 30, 2006, 12:00 am
$
0
0
I'm using Mathcad 13, and the one thing that I have not been able to find is how to format an equation so that it wraps at the right edge of a page in the same manner that text can be made to wrap at the right edge of a page. If the equation bleeds over the right edge of a page, then when printing the "bleeding edge" of the equation is printed by itself on a separate page. Personally, I find this extremely annoying as well as being a waste of paper. Even switching to landscape mode on 8.5" x 11" paper leaves some of the equations that I am working on bleeding off the right edge of the page, and I have decided not to include some of them in my printouts for this reason.

Does anyone know if there is a way to force equations to wrap at the right edge of a page if they are too wide to fit the width of a page?

If not, I guess that I will have to post this to the feature suggestions forum.

Thanks in advance.

Best Regards,
Matthew
↧

Can't convert .mcd files

July 12, 2015, 2:49 pm
$
0
0

Hello,

I have got an important .mcd file which I'd like to convert into .mcdx, but the XMCD, MCD converter button in the input/output-ribbon is inactive, i. e. I can see it, but can't click on it.

What can I do?

↧

Unable to create 12.0 engine factory' error

August 13, 2008, 12:00 am
$
0
0
Hello, I am troubleshooting an installation of Mathcad 13.1. When launching from the machine with the installation there are no problems. However, This machine is on a network and the goal is to allow user client machines to launch the application served by the machine with the installed version of Mathcad 13.1. When a client machine tries to launch Mathcad from the mapped network drive the error "Unable to create 12.0 factory" is displayed. Has anyone any experience running Mathcad locally on a client machined from a server with this error? Any insight would be greatly appreciated.

Thanks in advance!
↧
Search

How to add two graph in Mathcad

June 6, 2008, 9:14 am
$
0
0
Hi, I am trying to model solar cell characteristics in partial shading. i need to add two graphs which i have already plotted in Mathcad.Please suggest me any general method. Further how to add independent variable? I have thought of this way once but not possible.can two independent variable ( for example I have f(x1) and f(x2)) be added to form a third variable. (I mean is it possible to define f( x1+x2). I tried the same in mathcad but it seem impossible. if this two functions are already plotted how to get the superimposed graph of two? Thanking you in advance Have a nice weekend
↧
↧

3D Plots in MathCAD 14

July 2, 2010, 3:47 pm
$
0
0

Hello,

 

I'm new to these forums and I just had a quick question.  When I set up a two variable function and try to plot it, MathCAD recognizes the function and seems to plot it successfully but it doesn't display.  I can, however, see contour plots of the same function.  Vector field, 3D scatter plot and 3D bar graphs don't display either.  I'm kind of thinking it's a plugin problem or something.  Any ideas?

 

 

Thanks.

↧

Prime 3.0 xmcd, mcd converter

February 17, 2014, 6:46 am
$
0
0

Most of my 14/15 files failed conversion.  The conversion log only says "Conversion failed and Conversion aborted".  Why is this?

↧

Exporting from Mathcad to Word

June 17, 2011, 8:35 am
$
0
0

Hi all!

 

When i copy from mathcad and paste to word (i tried different paste options) text is ok, but formulas are as pictures, it is also if i save as .rtf file. Is there any way to export formulas to word as text or equations, and not as pictures?

 

Thank you.

↧

Working with numbers or variables with Units

October 9, 2006, 12:00 am
$
0
0
I am well familiar with MathCad numerical calculations and programming. However, I got accustumed to work my solutions without alphanumerical dimensions next to the number or variable. It is clean an easier for me to keep track of units and conversion in my mind than assigning units to numbers and varaibles at the beguining of calculations or programming with MathCad.



I tried otherwise recently but with problems. My question is to anybody: What is the best way not to get bugdown with error messages becuase units have not been defined properly at the beguining of any problem set-up or during calculations?



I am a structural enginer and work often with Kips, U.S. Tons, Yards, ft., inch.,etc. How do you mix these units in calculation and get the correct answer without keeping track of their different units? Help is appreciated. Thanks.
↧
↧

Why Mathcad Should Implement Unit Handling

April 17, 2008, 12:00 am
$
0
0
http://collab.mathsoft.com/~Mathcad2000/read?110034,15
On 4/17/2008 10:25:58 AM, jmG wrote:
On 4/17/2008 2:26:12 AM, stuartafbruff wrote:
== On 4/16/2008 8:13:09 PM, jmG wrote:
== You attempted putting units in the original work sheet in this thread,fine: it turned red. What was the point then?
>> One point is that, given Mathcad's claims to support unit handling in calculations, it ought to support unit handling in the every-day engineering task of solving ODEs.

ODE's carrying units is a lost case like all Engineering cases. There are many kinds of maths, the kind that govern your life and mine are "Engineers maths". These maths start with physical laws (sometimes many). Then the "working formula" is designed taking into account all relationships. That means the end user enters all inputs in the dimension the formula was "designed based on" which means everything is scalar, like a piece of polynomial algorithm in the "working formula". At the time "La Condamine" determined the "meter", he didn't use the meter first, is it ?
For understanding units, then units in Mathcad, you must first accept some learning process, but that many collab do refuse this learning part. There is always the problem of first converting units in their end use, for instance: viscosity is used differently by different end users... in Instrumentation we use Cp (centiPoise), other use what they use.

The other point in discussing units is the (�) that should come to any result, which needs another set of calculations that can't be practically carried simultaneously. What matters is always the same, i.e: the tracability

Example of traceability:

1. The working formula has an ISO number (per say) or other source.
2. Input data are in the appropriate dimensions: m, mm, �C ...
3. The "UnitResult" is then in ? whatever it should be
4. The maths are scalar, for paper-pencil check.

Carrying units in a math software like Mathcad is re-inventing the wheel. Engineers don't re-invent the wheel, they take it from generations to generations. A DE has a "UnitResult" by nature, what is the point of carrying units directly or indirectly via conversion between physical systems. Engineers make both ends meet and traceable by plugging the right values in, and appending the "UnitResult" via the "working formula(s)".

Remember the Mathsoft unit example that outputs Reynolds number (dimensionless), R = zombie units ! I may still have that work sheet, but usually don't conserve horrors.

What are solvers (your ODE as you want), they are scalars.
What is (are) the unit(s) of scalars ?

Oh ! there is nothing wrong carrying "decorations" in a DE setup, you might have hard time convincing all the books are wrong and were wrong.

The two key points in there: working formula, traceability


http://collab.mathsoft.com/~Mathcad2000/read?110058,99
On 4/17/2008 5:09:33 PM, jmG wrote:
That Mathcad users could do some calculation based on units relationship is all OK, like in pocket calculators, there is nothing wrong with that and I support the idea . But putting units in formulas should be removed TOTALLY. Remove units in Mathcad is the goal for Engineers (though they don't have to use, just ignore), i.e: remove units so that serious and responsible users in this society will be forced to trace their work. If Mathcad is not the tool to design "working formulas", then Mathcad has no place in the public market.

There is no accommodation between units and maths, maths are scalars.


I suppose I should point out that I'm not a great user of units and tend to avoid them, mainly because I'm lazy and like to avoid the effort involved in working around most of the restrictions on Mathcad unit handling (eg, mixed units and SUC). However, there a number of points that in the above messages that I disagree with.

First, the claim that 'there is no accommodation between units and maths, maths are scalars'. 'Maths' has moved on considerably since the days when maths just considered scalars. There are many classes of algebra that handle composite entities, such as tensors, and there is a well developed algebra to handle units. The very fact that in Mathcad one can add lengths in different units but not lengths and masses is underpinned by this algebra. If you believe that there is a conflict between maths and the manipulation of units, please provide an example.

Second, whilst some engineers may use the same wheel from generation to generation, many have to adapt their "wheels" to different uses, legislation or unit systems, or even invent new kinds of wheel to suit particular circumstances. The latter engineers cannot rely upon existing formulae and may well have to look at different ways of solving their problems (eg, matrix methods of implementing multi-dimensional simulators rather than explicit expansion of each dimension's quantity equations). In such cases, the ability to let the software handle units improves the verification process by reducing the effects of human error in the derivation of a formula's units.

Third, it is good practice to associate units with each step in a set of calculations. It is not good practice to rely upon humans to correctly document items by the use of repetitive and tedious manual entry. Cut and paste errors, typos and omissions are commonplace, in my experience, and can be missed by even thorough reviewers. Automating the process reduces the number of errors, speeds up the implementation, eases maintenance and gives a lot more job satisfaction to the implementer.

As for traceability, "2. Input data are in the appropriate dimensions: m, mm, �C ..." - a worksheet may well state "mm" in the text, but (due to human error once more), the person inputting the data may not take note of this and enter measurements they made in cm (eg, some builders quote dimensions in metres, others centimetres and other millimetres); the result will be incorrect. However, if the user was "forced" to enter the unit along with the numerical value, then well written software would produce the correct result in the correct units.

Still, we've been through all this several times ... http://collab.mathsoft.com/read?90582,11

Stuart

Remember the Gimli Glider! Remember Mars! Remember to check your units!
↧

3D Plots in MathCAD 14

July 2, 2010, 3:47 pm
$
0
0

Hello,

 

I'm new to these forums and I just had a quick question.  When I set up a two variable function and try to plot it, MathCAD recognizes the function and seems to plot it successfully but it doesn't display.  I can, however, see contour plots of the same function.  Vector field, 3D scatter plot and 3D bar graphs don't display either.  I'm kind of thinking it's a plugin problem or something.  Any ideas?

 

 

Thanks.

↧
Search

Evulation problem

April 21, 2015, 6:58 am
$
0
0

Hey guys. I want to solve a question in mathcad, but it gives me an udunderstandable answer. How can i evaluate the answer so it's only numbers. Thanks in advance see attached files.

↧

Wrong font display of symbols

August 11, 2009, 1:03 pm
$
0
0
When typing any type of equation,: shows up as a PC wingding, = shows a diskette icon and all others are showing up in bizarre language machine. Looked at Regional settings under windows, changed the keyboard/country/language settings and still no normal display... Changed font under MatchCAD and still the same... What is wrong? See attached Word file example.
↧
↧

Strict enforcement of boundary conditions

July 27, 2015, 3:24 am
$
0
0

Dear PTC Community

 

From a set of x and corresponding y values I'm trying to solve a system of equations and for this I'm of course using a set of boundary conditions. One of these is that all solution values are equal to or above zero (i.e. non-negative) but despite using the minerr-function to solve the system I still get negative values. They are, however, quite small and the results are thus usable but it seems strange to me that the negative values can't be avoided. Is there a way to strictly enforce a boundary condition?

↧

Round up to nearest 0.5

March 20, 2009, 12:00 am
$
0
0
Anyone know a simple way to round up a figure to the nearest 0.5?
↧

Mathcad 6.0 + and Windows 7

August 23, 2010, 4:12 pm
$
0
0

Any Mathcad 6.0+ fans out there?

 

I've been using it since 1995.  I got the Mathcad 7 and 8 upgrades and hated them.  So, I've been using 6.0+ ever since. 

 

Mathcad 6.0+ ran fine on Win 95, Win NT, Win 98, Win 2000, and Win XP.  Win 2000 and XP were a little trickier to install. I just took a good install from a Win 95 machine, copied the whole WINMAD directory and transferred it to the 2000 or XP machine. Then I tweaked the Windows file associations manually. 

 

Now I have Windows 7.  I tried the same procedure.  Most everything works fine, except when I Save or Save As...  Mathcad 6.0+ shuts down abruptly.  I’ve fiddled with the Compatibility mode and settings, but I get the same results.

 

Any suggestions?

↧
Viewing all 1503 articles
Browse latest View live
Search
<script src="https://jsc.adskeeper.com/r/s/rssing.com.1596347.js" async> </script>