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May 13, 2022
07:46 PM

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May 13, 2022
07:46 PM

Vector

When I try to calculate the cross product of two three element vectors I get an error message on the first vector

"This value must be a 3-element vector". I am using Mathcad Prime 8.0.0.0. I have tried the same thing on 7.0.0.0. I have changed the vector and matrix index Origin to from 0 to 1.

Jack Smith, Katy TX

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May 13, 2022
09:07 PM

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May 13, 2022
09:07 PM

Hi,

Vectors are matrices with one column and many rows.

Supplied to the cross product in your sheet are row matrices with one row and many columns,

Simply transpose the inputs.

Cheers

Terry

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May 13, 2022
09:07 PM

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May 13, 2022
09:07 PM

Hi,

Vectors are matrices with one column and many rows.

Supplied to the cross product in your sheet are row matrices with one row and many columns,

Simply transpose the inputs.

Cheers

Terry

May 13, 2022
09:26 PM

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May 13, 2022
09:26 PM

Terry, Many thanks for the answer to my question and also for the surreptitious tip on converting the single row, many column matrix that doesn't take a lot of space to the single column many row matrix.

Jack