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Werner_E
Werner_EAnswer
25-Diamond I
Oct 7, 2024 3:25 PM UTC

Whenever in  any calculation a NaN is involved, the result is NaN.

Werner_E_0-1728314285920.png

Maybe a utility  function to do the vector multiplication ignoring any multiplications with NaN involved could help:

Werner_E_1-1728314362218.png

Werner_E_3-1728314387669.png

Applied to your calculation it looks like this:

Werner_E_0-1728315265872.png

Is this somewhere near to what you expected?

 

The calculation takes some time as Prime has to multiply 3669*2=7338 times two 3670x1 vectors  and a user-written function using augment and filterNaN isn't very fast.

 

Prime 9 sheet attached

 

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9 replies

StuartBruff23-Emerald V
23-Emerald V
Oct 7, 2024 1:10 PM UTC
@YA_10963798 wrote:

I don't know why I getting this kind of result.. I tried everything. It is on page 15 . I use prime 9

YA_10963798_0-1728301451061.png

 

When you multiply any pair of vectors that contain at least one NaN, the result is also a NaN.

 

2024 10 07 B.png

 

Stuart

 

I've got Mathcad Prime 10, so I can't post a worksheet that's useful to you.  Sorry.

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YA_1096379815-MoonstoneAuthor
15-Moonstone
Oct 7, 2024 1:51 PM UTC

so that means the whole results will be NaN.. and that will erase all other results?.

 

 

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StuartBruff23-Emerald V
23-Emerald V
Oct 7, 2024 2:06 PM UTC
Yes, I’m afraid so.

Stuart
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Werner_E
Werner_E25-Diamond IAnswer
25-Diamond I
Oct 7, 2024 3:25 PM UTC

Whenever in  any calculation a NaN is involved, the result is NaN.

Werner_E_0-1728314285920.png

Maybe a utility  function to do the vector multiplication ignoring any multiplications with NaN involved could help:

Werner_E_1-1728314362218.png

Werner_E_3-1728314387669.png

Applied to your calculation it looks like this:

Werner_E_0-1728315265872.png

Is this somewhere near to what you expected?

 

The calculation takes some time as Prime has to multiply 3669*2=7338 times two 3670x1 vectors  and a user-written function using augment and filterNaN isn't very fast.

 

Prime 9 sheet attached

 

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    YA_1096379815-MoonstoneAuthor
    15-Moonstone
    Oct 8, 2024 7:32 AM UTC

    Thank you that solved my problem

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