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

L

LucMeekes

23-Emerald IV

Mathcad (including any version of Prime) is NOT capable of automatically creating variables. But Prime 'labels' items you create, and one of the possible label values is 'automatic'.... for whatever reason. You can also have 'variable', 'unit', 'constant' etc.

If you have your cursor on an item and tick the 'labels' selector, you will see the type of label associated with your item. Items with the same name, but with a different 'label' are treated as different items by Prime.

If you want, or need to, you can set the label type of your variable to 'automatic'. This does NOT mean it is automatically created.

Success!
Luc