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Matrix element - Calculating with arrays
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Offline hpf_br  
#1 Posted : 19 November 2013 20:15:38(UTC)
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Why it doesn't work on SMath ? It works fine on MathCAD 14.

Matrix element

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Offline IVR  
#2 Posted : 20 November 2013 00:49:17(UTC)
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1. Read program's documentation
2. Use for loop
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Offline mb10  
#3 Posted : 20 November 2013 14:16:34(UTC)
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Offline hpf_br  
#4 Posted : 20 November 2013 14:22:20(UTC)
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I didn't find anything about calculating with arrays in this way. And it's not necessary to use loop as i won't test anything. In addition to typical linear algebra calculations, arrays in Mathcad are useful for performing calculations repeatedly over a range of values. See in the first image another SMath example and in the 2nd image how Mathcad does it:

Edited by user 20 November 2013 14:35:48(UTC)  | Reason: Not specified

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ITERVEC.png
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Offline mkraska  
#5 Posted : 20 November 2013 19:03:09(UTC)
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SMath cannot handle vector-valued indices in expressions (AKA "range variables" in Mathcad). Therefore you MUST use loops or you rely on functions from 3rd party plugins like matlab c++ library by uni or Maxima, where nearly all functions can be applied to vectors (without indices). Your example reveals that you might not be aware of the difference between text indices and adress- or array indices.

Most of the tutorials for SMath adress this issue, as this is a very common pitfall for newbies.
File Attachment(s):
Section matrix elementwise.sm (36kb) downloaded 126 time(s).
Martin Kraska

Pre-configured portable distribution of SMath Studio: https://smath.com/wiki/SMath_with_Plugins.ashx
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Offline hpf_br  
#6 Posted : 21 November 2013 19:13:51(UTC)
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My intention was to reproduce in SMath Studio operations with vectors as in Mathcad. I understand you, but on Mathcad there is no problem to do like that. Besides, only now I'm working with SMath, and I also learning on how to use the program.
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