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Help opening Mathcad 7 files

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Hello I have been trying to open Mathcad 7 files on the trial version of mathcad 15 and everytime I get the message "Mathcad Application has stopped working". They are crucial files needed for my research so I would appreciate any suggestion on what to do.

 

I have also tried converting to XMCD to view using Mathcad Prime 3.1 but always gives the message "Unexpected error encountered during conversion"


Avoid "division by zero" doing sym math

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Hi,

first of all sorry for my poor English.

 

I've a little trouble with mathcad usage; for sure is a silly question but this is my very first approach to function programming.

 

i've three vector (not range variables) filled with symbolics value only in some position and zero value

in others.

 

This came because i've specified some value of interest of the vectors like for example :

 

vect_1(13):= v1+v2           (of course with right  mathcad syntax..here i can't write pedix - not literal pedix of course)

vect_1(38):=v1-v2           (in general each element is a function of v1 v2.. vn coordinates)

 

so mathcad create a vector "vect_1" filling the place at 13 and 38 with my desidered symbolic values ; set zero in other place.

 

 

With these 3 vector now i've to cycle and , for each element ,i  want to store in other new vector the result of this formula:

 

result(i) = 0.5 * vect_1(i)^2  * vect_2(i)  /  vect_3(i) ;

 

But because vect_3 is partially filled with zero, my for cycle stop obviously when the first "div by zero" is executed.

 

I try with if construct to skip zero element but the syntax :


if (   vect_3(i)  <> 0)   dosent' work, because i suppose mathcad can't valutate symbolic condition with logical boolean equal.



Please see the attached file; i've included all the code, but the error is in only last little block .


Thanks in advance.





entering multiline expressions

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Sorry if this has already been asked/answered. I did look

 

I want to enter a long expression and have it wrap so that it stays within the page margins.

 

In older versions of MC one could use control-enter to wrap to the next line but that does not seem to work in MathCAD Prime...

 

Is there a way to create a multiline expression in MC Prime?

 

--D

How to assign the solution of a equation to a vector?

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Mathcad can solve aequation and give the solution directly. But I hope the values of the solution to be assigned to a veriable or a vector, how I should do?

Function of another function

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Hello,

let's say we have defined a function f(x,y) and another one, g(f(x,y),u,v), so g is a function depending on u, v and on f(x,y). How do I write the function g correctly in Mathcad: g(f,x,y,u,v) or g(f(x,y),u,v) or g(x,y,u,v)? It may be a stupid question, so I apologize for that, but I need to understand how Mathcad "thinks"...

Thanks in advance for your answers.

diagramms: usability or crap?

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As long term user of Mathcad, Prime is like **** for me. Could you please explain how to change the range (limits) for the axis', add legend text to be displayed instead  the x and y terms and remove this red frame...

thanks

Creating A Vector of Functions - Possible?

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I am somewhat new to Mathcad and I was wondering if this was possible to do.

I basically want to create a vector with stored functions.

 

See the attached mathcad v15 file with comments.

 

Thanks in advance for your comments!

Overlapping text

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I am working with another engineer.  When I open his sheets there are problems with text overlapping one another. If it were screen size I would think that it would still print out ok, but it does not. It prints the sheets with the overlapping print.   Is there a way to fix this. 


Mathcad file compatibility

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I had Mathcad Prime 2.0 on my old work computer, which saved files in a .mcdx format.  My new work computer has Mathcad15 on it and saves files in a .mcdz format.  I don't seem to be able to open my old files.  Is there a way to open my old files with Mathcad 15?  Or do I need to re-create them?

How to change the background color of mathcad prime 3.0 sheet

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Hello, anyone knows how to change the background color of mathcad prime 3.0 sheet.

thanks in advance for your help.

simple, 2 variable function, range for variables, plot

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I'm brand new to Mathcad and racking my brain over something which should be simple.  All I want to do is write and plot the following:

 

M : 6*P + 1440*G

P: 1000, 2000; 10000

G: 140, 141; 150

 

My thought is that the solution indexes through each increment and 2D matrix develops and I plot with P (x axis), G (y axis), and M (z axis).  But nothing is working for me.

 

Can you help?

 

Many thanks,

dscott

Mathcad express - setting default math formatting?

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I'm using Mathcad prime 3.1 express at my school for electrical calculations.

And I am constantly switching between the taps  "MATH" and "Math formatting"

It's really a hazzle..

 

Things i would like to change is

 

General should be Decimal or Engineering, Decimal values i need to be (5) not (3) as it is now.

and finally complex numbers should be displayed in polar instead.

 

I find myself switching the tab almost after each line of writing, and for one assignment i usually fill 2-3 A4 pages.

so it's really getting to me that i can't figure out how to set these things so they STAY that way be default.

 

Anyone have an idea on how to change the standard values under math formatting?

Uninstall Mathcad Prime 3.1 / Downgrade to 3.0

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Hi

I have succesfully upgraded to Prime 3.1 from 3.0.

 

Does anyone know how to install Prime 3.0 to run with 3.1 simultanuesly?

Or how to downgrade 3.1 to 3.0?

Or how to uninstall 3.1 to then install 3.0?

 

Thanks in advance

Michael

Integration with if function

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I am trying to do some simple math to integrate a step change function using Mathcad 15.

The problem as simple as a capacitor has two values, at a threshold voltage.

When the voltage is below one value, say 20V, the capacitor is large, say 40pF

When the voltage is above the threshold, 20V, the capacitor is small, say 20pF.

To calculate the charge in the cap as a function of capacitor voltage, I can do it two ways.

1, Define the capacitor value as a function of voltage and describe it as if function. Then integrate the capacitor with voltage to get charge.

2. directly integrated capacitor with voltage and put the if function in the integration equation.

The two results are very similar, however, the method one has significant error comparing with second method. See the attachment.

Is there any thing wrong with the algorithms inside the Mathcad that having trouble to handling the if function inside integration? I am using the integration with if function a lot and really concerning on the accuracy of the math.

Thanks.

Bing

Enable / disable overwrite warnings?

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Hello

 

is it possible to enable / disable a warning if an expression overwrites an existing / predifined function or constant?

Such as c:=4 should warn you to then overwrite the Light Speed constant.

The was as seen in Mathcad 15

 

Thanks


Table of content

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Is it possible to create a TOC in Prime?

 

In MC15 it was possible somehow with Format Template + Save to RTF + Open in MS Word + Converting Formatted Text into Head text format

But Format Templates and RTF are gone. Numbering is supported now but TOC is not?

 

Michael

Page numbers

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Hi,

 

is it possible to get and use page numbers in formulars in Mathcad Prime?

Mathcad14 / Windows10 and DLLs

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Hi all, I've installed Mathcad14 on Windows10. Mathcad seems to run fine but I cannot run DLLs any more(not even the example DLLs in the userfi executable folders). Anyone has any expertise nice with running and compiling Mathcad14 DLLs in a Windows10 environment.

 

I've also tried to complile some DLLs the same way that did in a WindowsXP (using studio 2010 express) environment but I was not successful (compliles ok but Mathcad cannot access/read the DLL).

 

Any help is appreciate. Geo

Search and Replace in MathCAD Prime 3.1 needs improvement

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1. The current "Search and Replace" will search the whole document, but sometime I only need to search in a local region.

2. can't search and replace the content in the sub- or super-script

Variable names

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Can anyone tell me how to make my variables names more consistent with the notation commonly used in engineering?



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