[SS-2302] Smath File Crash

#1 Posted: 3/4/2016 11:48:32 PM

130 likes in 352 posts.

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The following Smath File worked fine under 97.5890. It opens a Excel data file for analysis.
But it crashes under 98.5905.
Why this happens?
File not found.File not found.

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

#2 Posted: 3/5/2016 8:08:32 AM

Davide Carpi

1415 likes in 2872 posts.

Group: Moderator

The crash is triggered in sum(1)

Even copying the Q matrix in a definition on the canvas the crash still happens.

Issue isolated: crash sum 1.sm (318 KiB) downloaded 39 time(s).

P.S. try sum(identity(30)) and sum(identity(50)), the second one crashes for me

opened as issue SS-2302

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#3 Posted: 3/5/2016 8:59:45 AM

Jean Giraud

983 likes in 6866 posts.

Group: User

Try this instead

#4 Posted: 3/5/2016 9:07:29 AM

Jean Giraud

983 likes in 6866 posts.

Group: User

... sorry, forgot to attach the file

crash sum 1.sm (322 KiB) downloaded 38 time(s).

#5 Posted: 3/5/2016 12:44:48 PM

NDTM Amarasekera

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Wrote
P.S. try sum(identity(30)) and sum(identity(50)), the second one crashes for me

The second one crashes for me too

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

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Davide Carpi 3/5/2016 1:38:00 PM

#6 Posted: 3/5/2016 6:33:25 PM

Andrey Ivashov

2269 likes in 3730 posts.

Group: Super Administrator

Good catch! Fixed (see http://en.smath.info/forum/yaf_postst7329_UPDATED--SMath-Studio-0-98-5908--05-March-2016.aspx).

Regards.

2 users liked this post

Davide Carpi 3/5/2016 9:05:00 PM, NDTM Amarasekera 3/6/2016 9:53:00 AM

#7 Posted: 3/5/2016 8:55:35 PM

Jean Giraud

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Ioan,

You can dedicate a function "VectorMatrixSum(data)"
Unwrap has many more applications, thus interesting.
Under the hood, your combined Sigmas, they first
Unwrap. Matrices don't exist in computing Machinery.
Matrices exist as serialised components.
The "BombCompute Mathcad 11", copy/paste a fair size
matrix [16000000 per say] takes substantial time.
"Warning: the requested operation may take long time".
Can't be more true.
Cppy/paste 16000000 vector: NO warning message... done.

Chers, Jean

#8 Posted: 3/6/2016 9:49:45 AM

NDTM Amarasekera

130 likes in 352 posts.

Group: User

Thank you Andrey.
The problem on Smath file crash is now solved.

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

1 users liked this post

Andrey Ivashov 3/6/2016 5:37:00 PM

#9 Posted: 3/7/2016 12:44:24 AM

Jean Giraud

983 likes in 6866 posts.

Group: User

Wrote
Thank you Andrey.
The problem on Smath file crash is now solved.

"now solved", maybe not so wrt matrix manipulation.
Observe the matrix scale code: M-Min(M)
I found out this built-in code is weak, prone to failure
with incorrect error message " Matrix is not invertible".
There is no matrix inversion involved. Observe the robust
code doing same. Example has low numerical values. At values
in the order of 10^10, module [1] fails.

Jean

Utilities Matrix Scale.sm (14 KiB) downloaded 43 time(s).

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Davide Carpi 3/7/2016 9:19:00 AM

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