Rotate matrix Quadrants

#1 Posted: 2017/4/10 10:35:15

Jean Giraud

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Often, very useful .

Jean

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Arie 2017/4/10 12:19:00, NDTM Amarasekera 2017/4/10 12:23:00

#2 Posted: 2017/4/10 12:08:46

Davide Carpi

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even simpler

2017-04-10 17_06_46-SMath Studio - [Utilities%20Matrix%20Rotate%20Quadrant.sm_].png

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Arie 2017/4/10 12:19:00, NDTM Amarasekera 2017/4/10 12:23:00, Radovan Omorjan 2017/4/11 10:24:00

#3 Posted: 2017/4/10 13:19:26

Jean Giraud

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Wrote
even simpler

Thanks Davide: great 6179 !

Jean

#4 Posted: 2017/4/10 14:07:40

NDTM Amarasekera

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Why this happens with attached worksheet?
Mirror_Problem.sm (20.51 KiB) downloaded 744 time(s).

Look within!... The secret is inside you. Best Regards Eng. NDTM Amarasekera - Sri Lanka

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Davide Carpi 2017/4/11 06:22:00

#5 Posted: 2017/4/10 18:43:24

Jean Giraud

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The two red regions created "Unknown error".
The algorithmic chain fails.

Jean

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#6 Posted: 2017/4/11 06:22:38

Davide Carpi

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Wrote
Why this happens with attached worksheet?
Mirror_Problem.sm (20.51 KiB) downloaded 744 time(s).

You found a bug in el(), thank you!

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#7 Posted: 2017/4/12 20:20:09

Jean Giraud

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Wrote
You found a bug in el(), thank you!

Hello Davide,

IMHO, the case reported by collab NDTMA is not a bug.
Simply an instance of "shadow in the context" [Mathematica].
Similar broken algorithmic links have been encountered in Mathcad.
We can't play much with the "vector/matrix" codes.
Here is a similar example in the attached.

Cheers, Jean

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