Solve Root of Equation by Matix in Mathcad Prime

Forum|Forum|8 years ago
March 29, 2018
2 replies
12034 views

Dear All,

How let Prime Solve Root of Equation by Matix ?

Many thank.

1_PC-15.rar

Other

W

Werner_E

25-Diamond I

My first try was to copy the equation you want to solve and use the symbolic solve command ... and it fails

I retyped the equation myself and ... it worked!

Confusion, but after playing around a little bit I found out that its again Primes auto labeling which causes the error. This "feature" is more pain than anything. If you manually set the label of x and y in the expression Q(x,y) from "variable" to "automatic" it also works with the expression you have typed.

And of course you always can use the good old numeric solve block, which most of the times is the better alternative to symbolics anyway if you are just after numeric results. The solve block seems to be much less sensible concerning labels - it also works using the original expression.

S

SPRstructur

Author

15-Moonstone

@Werner_E wrote:

My first try was to copy the equation you want to solve and use the symbolic solve command ... and it fails

I retyped the equation myself and ... it worked!

Confusion, but after playing around a little bit I found out that its again Primes auto labeling which causes the error. This "feature" is more pain than anything. If you manually set the label of x and y in the expression Q(x,y) from "variable" to "automatic" it also works with the expression you have typed.

And of course you always can use the good old numeric solve block, which most of the times is the better alternative to symbolics anyway if you are just after numeric results. The solve block seems to be much less sensible concerning labels - it also works using the original expression.

Thank you so much @Werner_E . it working.

but I have question relate to this topic as Pic Attach and File Attach
1. Create Auto Variable in Matrix?

2. Solve those Variable?
Many Thank,

1_PC-16.rar

T

terryhendicott

21-Topaz II

Hi,

I have previously posted a reply with Stiffness-3 Prime solution that analyses a continuous beam with no programming just MathCad statements. It has been verified against commercial software.

It seems the question is how to get this automated when the analysis is bigger or smaller or different layout auto-sizing the matrices to suit.

Programming the existing MathCad statements into a function Do_It_All() makes this possible.

I much prefer working in the non Prime Mathcad to get this right. I will leave transposing to Prime to you as you will learn from this.

Cheers

1_Stiffness-Defined.zip