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Workings of the cspline and interp function

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I am doing a spline fit (probably cspline). I can get it to work fine in Mathcad but I need to program the function into a microprocessor. Therefore, I need to extract the coefficients generated by the cspline function and determine how interp applies them.

Any idea how I can get that information?

Thanks in advance

Pete

Mathcad 15 "onefn" function problems

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I am having trouble with the onefn function in Mathcad 15.  I get double entries in the 1/f noise vector and if I take the CFFT(ofn) I get a zero as the first result.  Also I do not understand the mirrored magnitude plot of the 1/f Noise.  I also don’t understand why the range variable even starts at zero.  That would give infinity for 1/f.  See attached.

 

Bill

 

Bill Dumke, RF Engineer

Nsight Telservices dba Cellcom

450 Security Blvd

Green Bay, WI 54313

using a vector inside an if statement

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I am trying to create an expression where an if statement contains a vector. Mathcad gives an error stating that the value in the if statement must be a scalar. For example: H:= if(i< zmax/2, p1, p2) where i is a time vector. Is there a way to use a vector in an if statement?

Thanks,

Art

Solving Equations for undefined variable with units

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So, I am confused on how to solve an equation for an unknown with units. I am not sure if I am having unit problems or if my way of stating variables is incorrect. I am simply just trying to solve for the variable "d" which should have units in length. How should I declare variables that rely on other known and unknown variables? When should I solve an equation symbolically and just numerically in terms of getting proper units? I am used to using maple 16 so switching to MathCAD has been fairly intiutive but I am failing to pick up on certain features. If you fix my MathCAD code, I should be able to figure it out from the fix solution. Thanks!

equations.PNG

Workings of the cspline and interp function

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I am doing a spline fit (probably cspline). I can get it to work fine in Mathcad but I need to program the function into a microprocessor. Therefore, I need to extract the coefficients generated by the cspline function and determine how interp applies them.

Any idea how I can get that information?

Thanks in advance

Pete

using a vector inside an if statement

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I am trying to create an expression where an if statement contains a vector. Mathcad gives an error stating that the value in the if statement must be a scalar. For example: H:= if(i< zmax/2, p1, p2) where i is a time vector. Is there a way to use a vector in an if statement?

Thanks,

Art

Mathcad 15 won't run on Windows 7

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Hi

 

I have a computere with windows 7 x64 there, no matter what i do, won't run mathcad 15.

The installation seems to be completed without any problems, but when i try to run the application, the splash screen shows up, but after a short period of time, the application crash without any error messages except the Windows own "Mathcad application has stopped working".  I have another computer also with windows 7 x64, and here the application will start without any problems .  The only differense between these computers is that the first one is a "samsung" installation width showelware and all, and computer nr. 2 is a vanilla installation of windows.

 

I have tried the following

 

Reinstallation of MSXML 4.0 SP.2

---------||--------- of .Net, i can't remember the version, but it was the newest I could find.

Reinstallation of the computer (with the samsung disk)

 

But nothing seems to work. Mathcad 14 worked without any problems...

 

I hope somebody will help, and sorry for my bad english, i´m a dane

Radian to degrees

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I am new to using MathCad, but it seems that I should be able to figure out how to change from radians to degrees. The manual is pretty much worthless, and the help section merely states that MathCad gives results of trig functions in radian mode. No kidding. Any help is appreciated, and yes I feel like a moron.

Unable to create 12.0 engine factory' error

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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!

using a vector inside an if statement

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I am trying to create an expression where an if statement contains a vector. Mathcad gives an error stating that the value in the if statement must be a scalar. For example: H:= if(i< zmax/2, p1, p2) where i is a time vector. Is there a way to use a vector in an if statement?

Thanks,

Art

Mathcad Prime 2.0 plotting functionality. Argh!!

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I am so frustrated by Mathcad's continued plotting ineptitude I can hardly take it.  We waited for years and years for the old Mathcad to add the flexibility needed to make decent looking plots and it NEVER happened.  Now in my first few hours of working with Prime 2.0 (I skipped 1.0) I am already extremely frustrated by basic stuff that really makes me wonder about the development team.  Come on, guys, I know you can do better than this!

 

Contour plots:

- z-axis scale/color bar is now included, hooray!

  - however, it's location and orientation are fixed (bottom, horizontal)

  - why can't I move it to the right and make it vertical?

- The labeling interval of the z-axis scale bar is tied to the number of

  contour intervals.  No!!!  If I want a lot contours then my labels get

  all mashed together and become completely unreadable.  Totally

  unacceptable.

- If I change the weight of the lines that separate the contours, the

  line weights in the z-axis scale bar do not change correspondingly.

  Come on!!

 

- No secondary y-axis in the second major release??  Very poor.

  I need this all the time.

 

- I can't change the font or the font size used for the axis labels.  I've

  only been waiting for this for uh...let's see...how old am I now??

 

- Why does the x- and y-axes extend beyond the minimum value set

  for the axes?  This leads to odd/awkward-looking axes, at least, not

  like any plots I've seen or want to make myself.

 

- Why can't I use a ticked/labeled box around my plots?  It seems the

  only option is the two intersecting axes.

 

- Um, how do I put titles on my plot axes?  Am I just being dense here?

 

- Thanks for letting me rant.  I guess it's export back to Excel for now

  for a lot of my plots.  Not that I like Excel's plots, either, believe me.

  But at least with fiddling I can get a decent-looking, READABLE plot

  out of Excel to present to other engineers and scientists, or include

  in a paper.  Not possible with what I've seen in Prime 2.0.  Sigh...

Mathcad 15 "onefn" function problems

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I am having trouble with the onefn function in Mathcad 15.  I get double entries in the 1/f noise vector and if I take the CFFT(ofn) I get a zero as the first result.  Also I do not understand the mirrored magnitude plot of the 1/f Noise.  I also don’t understand why the range variable even starts at zero.  That would give infinity for 1/f.  See attached.

 

Bill

 

Bill Dumke, RF Engineer

Nsight Telservices dba Cellcom

450 Security Blvd

Green Bay, WI 54313

Infinity symbols in text

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Just a quick question: How do I enter the "infinity" symbol into mathcad? Thanks!

Wes

wesfoll@hotmail.com

Mathcad 15 won't run on Windows 7

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Hi

 

I have a computere with windows 7 x64 there, no matter what i do, won't run mathcad 15.

The installation seems to be completed without any problems, but when i try to run the application, the splash screen shows up, but after a short period of time, the application crash without any error messages except the Windows own "Mathcad application has stopped working".  I have another computer also with windows 7 x64, and here the application will start without any problems .  The only differense between these computers is that the first one is a "samsung" installation width showelware and all, and computer nr. 2 is a vanilla installation of windows.

 

I have tried the following

 

Reinstallation of MSXML 4.0 SP.2

---------||--------- of .Net, i can't remember the version, but it was the newest I could find.

Reinstallation of the computer (with the samsung disk)

 

But nothing seems to work. Mathcad 14 worked without any problems...

 

I hope somebody will help, and sorry for my bad english, i´m a dane

Prime 2 - math region font

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How can I change math region font?

Where are the options to change fonts for variable, unit, constant, function, system, keyword?

Thank you.


MathCAD Prime 1.0 is a step back

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Hi friends,

well I just must realize, that Prime is a step backward. One the one hand important functions are missing and on the other hand all the experts out in the communities who has Mathcad 14/15 can not work with the MathCad Prime worksheets as it is not backward compatibility.

I think PTC must improve PRIME  quite a lot, as now the userbility is other but not better. Where is the useful collabsable region feature in Prime?

comments are welcome.

 

Walter

Radian to degrees

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I am new to using MathCad, but it seems that I should be able to figure out how to change from radians to degrees. The manual is pretty much worthless, and the help section merely states that MathCad gives results of trig functions in radian mode. No kidding. Any help is appreciated, and yes I feel like a moron.

Mathcad 15 "onefn" function problems

$
0
0

I am having trouble with the onefn function in Mathcad 15.  I get double entries in the 1/f noise vector and if I take the CFFT(ofn) I get a zero as the first result.  Also I do not understand the mirrored magnitude plot of the 1/f Noise.  I also don’t understand why the range variable even starts at zero.  That would give infinity for 1/f.  See attached.

 

Bill

 

Bill Dumke, RF Engineer

Nsight Telservices dba Cellcom

450 Security Blvd

Green Bay, WI 54313

How can i type "x" with circumflex

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Hello

 

I would like to ask how can i type "x" with circumflex

i.e.  a unitary vector.

I search on mathcad unimath font and I didn't find it.

Mathcad 15 won't run on Windows 7

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0
0

Hi

 

I have a computere with windows 7 x64 there, no matter what i do, won't run mathcad 15.

The installation seems to be completed without any problems, but when i try to run the application, the splash screen shows up, but after a short period of time, the application crash without any error messages except the Windows own "Mathcad application has stopped working".  I have another computer also with windows 7 x64, and here the application will start without any problems .  The only differense between these computers is that the first one is a "samsung" installation width showelware and all, and computer nr. 2 is a vanilla installation of windows.

 

I have tried the following

 

Reinstallation of MSXML 4.0 SP.2

---------||--------- of .Net, i can't remember the version, but it was the newest I could find.

Reinstallation of the computer (with the samsung disk)

 

But nothing seems to work. Mathcad 14 worked without any problems...

 

I hope somebody will help, and sorry for my bad english, i´m a dane

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