Two vectors

[Sml2010]

Hello everyone 

I have a problem with dividing two vectors by matrix.

I have two vectors, I am using math script node to multiply and divide these two vectors. for multiply it is ok and the answer is correct but for division it is not. 

I did that with linear algebra module but I had the same problem.

In " math script.vi " I don't know why the "Aal" amount is a DBL while it is a vector and we have to have an array nut a DBL

Would you please help me to find out my error.

[GerdW]

Hi Sml,

when you get unexpected results then you should not forget to mention which result you expected!

This is what I get by comparing Mathscript node and linear algebra:

Btw. it also would help when you attach all needed subVIs and control definitions when you attach VIs like "math script"! It also would help to use better names for your VIs: why does the "matrix" VI also contain just a Mathscript node?

[Sml2010]

Hello GerdW

thank you for your reply.

Please look at attached .vi (it is with out sub vi ).

The formula is this : 

The " Aal " answer is not a vector and this is my problem. How can I have a vector answer?

I changed the data type and select 2D array or Matrix but it didn't change

Would you please help me to find my error in this program?

Thank you

[altenbach]

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@Sml2010 wrote:

The formula is this : 

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(While a 1D array is sometimes called a "vector", nothing says that a 1D array with two elements should represent a vector in the XY (or complex)  plane with the first element representing x and the second y )

You have complex numbers, so do complex math using complex data!!!

(and no, you don't need Mathscript for any of that!)

[altenbach]

Not sure why you have that "round to inf" for you "e" variable. But if you don't really need that, you can eliminate a lot of explicit trigonometry because you can form a complex number from r and theta directly.

(if you really need that rounding, you need to form G more explicitly, but can still simplify A and B).

Or even use array operations to reduce duplicate code (and potentially take advantage of e.g. SIMD instructions) same result!.