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ptc-67445311-Visitor
1-Visitor
November 11, 2014
Solved

Find Block (solutions with units)

  • November 11, 2014
  • 6 replies
  • 3387 views

Hey, I am unable to solve my find block. I've defined my 2 equations, with a total of 2 unknowns, and have initial guesses for both. When I try to solve for the 2 variables, it says that my find function is undefined.

Anyway to solve this?

Im using mathcad 15. thanks

In the file, its under "Analysis".

Best answer by Werner_E

Mathcad does not allow for values of different dimension in one vector. The result your solve block would yield is a vector consisting of one unitless value (angle alpha) and one value of length (depth) so you cannot display that vector using the equal sign.

But you can assign the result to a vector with two variable names and evaluate those later one by one:

1.png

6 replies

Werner_E
Werner_E25-Diamond IAnswer
25-Diamond I
November 11, 2014

Mathcad does not allow for values of different dimension in one vector. The result your solve block would yield is a vector consisting of one unitless value (angle alpha) and one value of length (depth) so you cannot display that vector using the equal sign.

But you can assign the result to a vector with two variable names and evaluate those later one by one:

1.png

V
ValeryOchkov24-Ruby IV
24-Ruby IV
November 11, 2014

Werner Exinger wrote:

Mathcad does not allow for values of different dimension in one vector.

Sorry.

Mathcad 15 does not

Prime allows

Werner_E
Werner_E25-Diamond I
25-Diamond I
November 11, 2014

Valery Ochkov wrote:

Werner Exinger wrote:

Mathcad does not allow for values of different dimension in one vector.

Sorry.

Mathcad 15 does not

Prime allows

Correct, and we are dealing with Mathcad 15 here.

BTW, for me Prime is not Mathcad.

V
ViktorKorobov1-Visitor
1-Visitor
November 11, 2014

Calvin,

Fuction FIND in Mathcad 15 can not return a vector with different units.

See solution this problem in attached file.

Viktor

Werner_E
Werner_E25-Diamond I
25-Diamond I
November 11, 2014

You won't need to "get rid"/divide by rad as basically its not a unit, its 1.

Furthermore, if you omit the evaluation equal sign after the Find command you don't need to remove and later add again the unit meter either.

V
ViktorKorobov1-Visitor
1-Visitor
November 11, 2014

You're right, Werner. Thank you.

Viktor

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