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rscott6-Contributor
6-Contributor
July 22, 2020
Question

Mathcad 15, find just one variable

  • July 22, 2020
  • 2 replies
  • 3077 views

I want to simply find one thing. 

 

I have a rather large system fo equations and I just want to find one answer. 

Is there a way to put a single variable in a find statement. 

 

So if I have a system with X1 X2 X3 ...... X100

 

I don't want to have to have the following. 

A 100X1 := find(X1......X100) Its unmanable because all it does is run all over the page. 

I used to be able to do this in prime. 

 

I simply want to be able to find one variable. 

 

Answer := find (X33) 

 

How can I do this in 15?

2 replies

R
rscott6-ContributorAuthor
6-Contributor
July 22, 2020

No one knows?

Can someone please take a look at this I have been stuck with this for 2 days

 

R
rscott6-ContributorAuthor
6-Contributor
July 22, 2020

Anyone?.????

 

Can someone please help

 

This is ridiculous 

This is why I went to prime and now being forced back to 15

 

How is it possible no one can answer this

 

ttokoro
21-Topaz I
ttokoro21-Topaz I
21-Topaz I
July 22, 2020

https://rosettacode.org/wiki/Resistor_mesh

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t.t.
A
AlanStevens19-Tanzanite
19-Tanzanite
July 22, 2020

Do you mean you have 100 simultaneous algebraic equations in 100 unknowns and just want to find one of the 100 from a Given ... Find solve block. 

 

If so, you can do this by representing your 100 X's as a vector.  You need to solve for all 100, but can simply extract the one you want, and you don't have to write a huge list of values inside the Find expression.

 

Here's an example with three Xs (because I'm not spending the time to do 100):

 

g0.jpg

If this isn't what you mean, then you will need to explain your problem more clearly.

 

Alan

 

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