Vectorization bug

Vectorization bug - Messages

#1 Posted: 7/8/2018 3:38:09 AM
Radovan Omorjan

Radovan Omorjan

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Try to reproduce this, please.

This is the attached file bug.sm (4 KiB) downloaded 40 time(s).

bug1.PNG

Now, disable the function definition

bug2.PNG

f(x) vectorized will get stuck.

Regards,
Radovan
When Sisyphus climbed to the top of a hill, they said: "Wrong boulder!"
#2 Posted: 7/8/2018 11:09:58 AM
Jean Giraud

Jean Giraud

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Wrote

Try to reproduce this, please.



Not a bug, very many different calculated results are stored.
That is very handy ... example: images
The "rainbow ColorMap Electron" is there as you open the work sheet.

Jean

Radovan.PNG

Image Rainbow Colormap [Electron].sm (252 KiB) downloaded 29 time(s).
#3 Posted: 7/8/2018 5:53:25 PM
sergio

sergio

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I think Radovan just wanted to indicate a malfunction when the function is disabled and the subsequent vectorization on the function goes into an infinite loop.
I think he was expecting a non-evaluation (I was expecting it too)

sergio
1 users liked this post
Radovan Omorjan 7/14/2018 6:28:00 AM
#4 Posted: 7/8/2018 6:54:50 PM
Jean Giraud

Jean Giraud

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Wrote

I think Radovan just wanted to indicate a malfunction when the function is disabled and the subsequent vectorization on the function goes into an infinite loop.
I think he was expecting a non-evaluation (I was expecting it too)

sergio



It does not go into an infinite loop.
Once assigned, result of vector/matrix is resident as an identity to the project.
No matter if disabled afterwards, calculated and stored.
This feature is one of my preferred vs Mathcad.

Jean

#5 Posted: 7/8/2018 7:29:01 PM
Nicolae Olaru

Nicolae Olaru

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Wrote

... I think he was expecting a non-evaluation (I was expecting it too) ...



Hello

I did not think about this. That's why I decided to delete my previous message. With righteous excuses.

Nicolas.
#6 Posted: 7/8/2018 7:37:49 PM
Jean Giraud

Jean Giraud

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In MathCAD there are possibilities to solve some equations or systems of equations where vectorizing of functions can be applied.



Essentially, Smath vectorize operator works same as Mathcad [11 and earlier].
However, there are some nuance as Smath is not a clone of Mathcad.
Vectorizing an image over a function is gorgeous [grayscale, RGB] ...
... but there is an exception ... Explain:
Smath vectorizes a matrix over a scalar function.
linter, cinter, ainterp are NOT scalar functions.
You must then make them fake scalar via if/otherwise, exemplified in
Contour Solve [user ColorMap].

Jean

Solve TREASURY_1 [Iterate L, Lc].sm (36 KiB) downloaded 32 time(s).
Solve Recursive [f(x), Inverse f(x)].sm (57 KiB) downloaded 30 time(s).
Contour SOLVE [user ColorMap].sm (310 KiB) downloaded 26 time(s).
#7 Posted: 7/8/2018 11:28:25 PM
Jean Giraud

Jean Giraud

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Originally Posted by: ola_nicolas [url=/forum/yaf_postsm50702_Vectorization-bug.aspx#post50702][/url]In MathCAD there are possibilities to solve some equations or systems of equations where vectorizing of functions can be applied.



... here is a good example of vectorizing roots..

Vectorize Examples_00.sm (16 KiB) downloaded 29 time(s).

#8 Posted: 7/8/2018 11:53:06 PM
Jean Giraud

Jean Giraud

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Wrote

... here is a good example of vectorizing roots..


... that's the document I missed posting :

Vectorize Examples_00.sm (16 KiB) downloaded 33 time(s).

#9 Posted: 7/9/2018 3:00:56 AM
Radovan Omorjan

Radovan Omorjan

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I'll have to get back to my first post

bug1.GIF

Function f(x) was not defined. What is going on then? Why the calculation did not stop with an error issued? If you wait enough it can crash SMath. I reproduced that on few computers and suspect this might be a bug or a problem. That was my question.

Regards,
Radovan
When Sisyphus climbed to the top of a hill, they said: "Wrong boulder!"
#10 Posted: 7/9/2018 10:31:49 AM
Jean Giraud

Jean Giraud

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Wrote

Function f(x) was not defined. What is going on then? Why the calculation did not stop with an error issued? If you wait enough it can crash SMath. I reproduced that on few computers and suspect this might be a bug or a problem. That was my question.



For sure, if you wait too long before [Shift+Esc] it will crash Smath,
because it enters an infinite loop. That answers your question ! bug !
When entering an infinite loop there should be an error message/stop calculate.

Caution: if you figure you have entered an infinite loop stop,stop,stop ...
it will crash Smath and zap the document "root element missing" => 0kB
All that from true story !

You can generalize your attempt by defining algorithm style.

solveRadovan.PNG


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