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Maz1-Visitor
1-Visitor
January 8, 2011
Question

help needed

  • January 8, 2011
  • 2 replies
  • 13775 views

Hi everyone,

I'm a student and need to import pdf files which show received data in a system and with mathcad get the bit error rate and other values for it.

.

HELP

2 replies

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RichardJ19-Tanzanite
19-Tanzanite
January 8, 2011

Mathcad can't read a pdf file. If the data is in the file as text you should be able to copy and paste it into an input table. That depends on how it's formatted in the pdf file though. Can you post the file?

M
Maz1-VisitorAuthor
1-Visitor
January 8, 2011

Thank you so much for your reply. What if I have the data in excel? (I've now put them in excel to make it work)

I'm sure I can enter it that way can't I? The problem is I am completely stumped

I would greatly appreciate your help.

R
RichardJ19-Tanzanite
19-Tanzanite
January 8, 2011

Go to "Insert", "Data", "File Input", select your Excel file, select the worksheet, etc. If you want to change the worksheet later, right click on the File Input component, and select "Properties". You can use the submatrix function to remove the two header rows.

M
Maz1-VisitorAuthor
1-Visitor
January 8, 2011

I'm quite confused about choosing the parametres for the matrix and why does one need to guess values?

R
RichardJ19-Tanzanite
19-Tanzanite
January 8, 2011

I'm quite confused about choosing the parametres for the matrix

I'm not sure what you mean. Do you mean which parameters to choose, or do you mean how to calculate the derivative w.r.t those parameters?

why does one need to guess values?

The fit is a non-linear one (look up the linfit function to see what a linear function looks like) so it is not possible to calculate a numerical solution in one step. All non-linear solvers are iterative. You supply a starting point (the guess values), and they iteratively converge to a solution.

M
Maz1-VisitorAuthor
1-Visitor
January 8, 2011

I'm not sure what you mean. Do you mean which parameters to choose, or do you mean how to calculate the derivative w.r.t those parameters?


Unfortunately both. I'm sorry I keep asking more questions, but this has turned in to such a difficult thing. I am struggling and the more I read all the examples online just confuse me more.

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