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Solved Rounding Values in Vectors - User Function - Trying to make a function that rounds values in vectors
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Offline wb.c  
#1 Posted : 21 April 2022 20:07:51(UTC)
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The rounding function concept for a vector seems to work fine, but I am having trouble with a function that works on a vector containing multiple vectors.
Any ideas on how to make this work?

2022-04-21 13_02_27-SMath Solver - [Rounding Values in Vectors Function Concepts.sm_].png
2022-04-21 13_03_06-SMath Solver - [Rounding Values in Vectors Function Concepts.sm_].png

Rounding Values in Vectors Function Concepts.sm (18kb) downloaded 12 time(s).

Edited by user 26 April 2022 00:31:32(UTC)  | Reason: Not specified
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Offline overlord  
#2 Posted : 21 April 2022 20:35:30(UTC)
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Originally Posted by: wb.c Go to Quoted Post
The rounding function concept for a vector seems to work fine, but I am having trouble with a function that works on a vector containing multiple vectors.
Any ideas on how to make this work?

You can use recursive for that.
You have to also check if rounded row is a vector.
It can work with both vector and nested vector.
Here is your code revised.

Regards

PS: MarB's solution with Razonar's addition is better actually.
I would use that instead of mine, more elegant.
My version is just a brute algorithm.

Rounding Values in Vectors Function Concepts.sm (24kb) downloaded 2 time(s).

rounding_matrices.sm (11kb) downloaded 21 time(s).

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Edited by user 22 April 2022 23:37:49(UTC)  | Reason: Not specified
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Offline ndtma  
#3 Posted : 21 April 2022 20:40:42(UTC)
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Another approach

round_matrix.jpg
Look within!... The secret is inside you.
Best Regards
Eng. NDTM Amarasekera - Sri Lanka
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Offline ndtma  
#4 Posted : 21 April 2022 20:58:17(UTC)
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Above method will not work if the nested arrays are of different sizes.
Following method will work for any nested array.

Round_diff_Arr_sizes.jpg
Look within!... The secret is inside you.
Best Regards
Eng. NDTM Amarasekera - Sri Lanka
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Offline Ber7  
#5 Posted : 21 April 2022 21:10:48(UTC)
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Almost the same
Variant.png
Variant.sm (9kb) downloaded 7 time(s).
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Offline overlord  
#6 Posted : 21 April 2022 21:13:35(UTC)
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Code revised to solve not just vectors but matrices too.
Now very complicated matrices can be rounded.

Regards

PS: MarB's solution with Razonar's addition is better actually.
I would use that instead of mine, more elegant.
My version is just a brute algorithm.

rounding_matrices.sm (11kb) downloaded 21 time(s).

Click to enlarge

Edited by user 22 April 2022 23:38:21(UTC)  | Reason: Not specified
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Offline wb.c  
#7 Posted : 21 April 2022 21:16:07(UTC)
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Great ideas everyone, thanks for the input and improvements.
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Offline Ber7  
#8 Posted : 21 April 2022 23:42:27(UTC)
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Short code option
Variant1.png
Variant1.sm (6kb) downloaded 4 time(s).

Edited by user 22 April 2022 01:17:06(UTC)  | Reason: Not specified
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Offline Jean Giraud  
#9 Posted : 22 April 2022 01:38:00(UTC)
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Good idea to always start code native Smath ... given user extended.

Round matrix.PNG
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Offline overlord  
#10 Posted : 22 April 2022 01:44:19(UTC)
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You can also shorten function like this.

2022-04-22_01-43.png
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Offline MarB  
#11 Posted : 22 April 2022 13:39:35(UTC)
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A very short way is to use recursion:

roundM.sm (10kb) downloaded 7 time(s).

roundM.png

Edited by user 22 April 2022 13:56:32(UTC)  | Reason: Not specified
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Offline Jean Giraud  
#12 Posted : 22 April 2022 15:33:12(UTC)
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Up to this point, proposals round nested vectors.
Dealing with big numbers is also available.
123456789123456789 ... 987654321987654321
123000000000000000 typical
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Offline overlord  
#13 Posted : 22 April 2022 15:44:08(UTC)
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Originally Posted by: MarB Go to Quoted Post
A very short way is to use recursion.

This is just magnificent. Two heads are better than one.
I couldn't hit off how to do it with vectorize.

Kudos
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Offline Ber7  
#14 Posted : 22 April 2022 16:07:55(UTC)
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Originally Posted by: MarB Go to Quoted Post
A very short way is to use recursion:

Wonderful!
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Offline Razonar  
#15 Posted : 22 April 2022 17:29:14(UTC)
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Originally Posted by: MarB Go to Quoted Post
A very short way is to use recursion ...


Brillant solution. Adding eval to the SMath's round enables symbolic evaluations too.

Clipboard01.jpg

Best regards.
Alvaro.
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Offline mkraska  
#16 Posted : 22 April 2022 23:35:17(UTC)
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Minimalistic solution for Maximalists.

rounding_matrices_Maxima.png
rounding_matrices_Maxima.sm (5kb) downloaded 7 time(s).
Martin Kraska

Pre-configured portable distribution of SMath Studio: https://smath.com/wiki/SMath_with_Plugins.ashx
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Offline Jean Giraud  
#17 Posted : 23 April 2022 01:36:17(UTC)
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... twin vectors from function
Advanced Engineering applications.

Round Vectors.PNG
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Offline overlord  
#18 Posted : 23 April 2022 02:56:06(UTC)
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Originally Posted by: mkraska Go to Quoted Post
Minimalistic solution for Maximalists.

Sometimes I really wish I could use Maxima plugin under linux.
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Offline mkraska  
#19 Posted : 23 April 2022 12:31:05(UTC)
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Originally Posted by: overlord Go to Quoted Post
Originally Posted by: mkraska Go to Quoted Post
Minimalistic solution for Maximalists.

Sometimes I really wish I could use Maxima plugin under linux.


It is on my todo list and I think it is possible, but currently priority is on another project which also involves using Maxima and is entirely open source:

https://github.com/mkraska/meclib
Martin Kraska

Pre-configured portable distribution of SMath Studio: https://smath.com/wiki/SMath_with_Plugins.ashx
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