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Hi everybody, I have a units problems that I can´t solve. Can be a bug?  Here is my file.  Documento1.sm (30kb) downloaded 17 time(s). Libro2.xlsx (9kb) downloaded 17 time(s).Thanks in advance Regards Eduar Edited by user 06 August 2016 19:13:13(UTC)
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  Rank: Advanced Member Groups: Registered, Advanced Member Joined: 13/01/2012(UTC) Posts: 2,654  Location: Italy Was thanked: 1340 time(s) in 879 post(s)
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Hello Eduar, nope, is not a bug; the problem is in your second boolean comparison. You have nested a boolean less or equal in the left argument of a boolean less -> the first returns 0 and 1, then this result is compared with the second argument of the boolean less (and here you were lucky because you got 1 - when you get 0 you can't see the error) ![2016-08-06 18_34_31-SMath Studio Desktop - [Documento1.sm].png](/forum/resource.ashx?a=14434&b=2) You have to use the boolean AND to chain two boolean comparisons ![2016-08-06 18_37_51-SMath Studio Desktop - [Documento1.sm_].png](/forum/resource.ashx?a=14435&b=2) Alternatively it is possible to use the function lelt(3) from the plug-in " Custom Functions"  Edited by user 06 August 2016 20:18:27(UTC)
| Reason: marked as SOLVED |
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Thanks Davide, I´ll try it.
And thank you for the plugin.
Regards
Eduar
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Originally Posted by: Eduardl  Thanks Davide, I´ll try it.
And thank you for the plugin.
Regards
Eduar
Hi Davide, your method works fine. But I still have problems with the resolution of the division. I don't understand, the result is a vector. Sorry for the question, I'm a newbie in Smath. 
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Rank: Advanced Member Groups: Registered, Advanced Member Joined: 13/01/2012(UTC) Posts: 2,654 Location: Italy Was thanked: 1340 time(s) in 879 post(s)
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Don't worry; vectorize() is intended to apply to all the vectors' elements functions normally intended to work with scalars without using loops. In your case you have 2 ways: 1) use the loop; in this case vectorize() is not needed, remove it and everything should works ![2016-08-07 10_21_27-SMath Studio Desktop - [Documento1.sm_].png](/forum/resource.ashx?a=14438&b=2) 2) use vectorize(); in this case you have to remove all the references to the matrix elements. Note that in your case you have to pre-process or post-process the elements where Mu doesn't meets the requirements ![2016-08-07 10_21_37-SMath Studio Desktop - [Documento1.sm_].png](/forum/resource.ashx?a=14439&b=2) |
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 1 user thanked Davide Carpi for this useful post.
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Rank: Newbie
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Joined: 06/08/2016(UTC) Posts: 5
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Originally Posted by: Davide Carpi Don't worry; vectorize() is intended to apply to all the vectors' elements functions normally intended to work with scalars without using loops. In your case you have 2 ways: 1) use the loop; in this case vectorize() is not needed, remove it and everything should works 2) use vectorize(); in this case you have to remove all the references to the matrix elements. Note that in your case you have to pre-process or post-process the elements where Mu doesn't meets the requirements You are right! Thank you Davide. I hope I can contribute to the community in the future. Best regards Eduar
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EduardI,
If you have to select elements in the vectorise,
the Dot function may be the tool... just posted.
Jean
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Jean, thanks for the tip. I'm learning fast thanks to you guys!
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Rank: Guest
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Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 981 time(s) in 809 post(s)
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"Jean, thanks for the tip. I'm learning fast thanks to you guys!"
How do you know you are learning fast ? !
This type of indexed construction has many variantes, most useful.
For instance: randomly select reasonable number of data points from
an overpopulated collection to be fitted ...
Jean
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