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Offline qanniu  
#1 Posted : 08 November 2009 16:18:25(UTC)
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hi ,i'm just find smath today.i want to know is there some function like dec2bin or hex2bin...smath can you tell me thanks.

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Offline Andrey Ivashov  
#2 Posted : 09 November 2009 04:53:16(UTC)
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No. Program have no these functions, but they will be implemented.
Offline qanniu  
#3 Posted : 09 November 2009 06:35:21(UTC)
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thanks,hehe.i'was finding the function all the days yesterday.by the way ,it is morning in China.
Offline marks2c  
#4 Posted : 27 December 2022 03:40:39(UTC)
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Epic dredge sorry. Functional, with all credit to @Razonar (source/author).

dec2bin.png
20221227 Dec2bin.sm (5kb) downloaded 12 time(s).

Also needed:
* set string length (ie leading zeros), and
* functions for bit field testing.

Edited by user 27 December 2022 04:33:05(UTC)  | Reason: Crediting source

Offline Jean Giraud  
#5 Posted : 27 December 2022 23:14:06(UTC)
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Thanks, nice source code.
algo(col) was designed to recover matrix col(s) string(s) to values.
Cheers ... Jean.

Maths Convert-dec2bin.sm (19kb) downloaded 12 time(s).
Offline marks2c  
#6 Posted : 28 December 2022 00:19:56(UTC)
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The source was repurposed from Razonar.
Interesting, thanks Jean.

Do you know a way to implement a fixed 9-bit binary counter in SMath (or display a decimal counter in fixed-length binary)? This is probably a bit too esoteric to be a feature request...

Edited by user 28 December 2022 00:33:13(UTC)  | Reason: Not specified

Offline Jean Giraud  
#7 Posted : 29 December 2022 16:46:20(UTC)
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Originally Posted by: marks2c Go to Quoted Post
The source was repurposed from Razonar.
Interesting, thanks Jean.

Do you know a way to implement a fixed 9-bit binary counter in SMath (or display a decimal counter in fixed-length binary)? This is probably a bit too esoteric to be a feature request...

Sorry Collab: I have no idea yet how to counts pulse.
From recollection, such demand was not honored.
Cheers ... Jean.

Offline overlord  
#8 Posted : 29 December 2022 17:50:13(UTC)
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If I understood correctly;
You want a 9bit binary representation similar to 8084 cpu registers.
I must admit it is a highly specific request.

registers
Offline Jean Giraud  
#9 Posted : 29 December 2022 19:07:13(UTC)
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That comes easily ... ?

countbinary.PNG
Offline marks2c  
#10 Posted : 29 December 2022 21:04:28(UTC)
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Thanks Jean, greatly appreciated.

I should have been more clear in my request.

I'm after a 9-bit long bit-field count that I can test each bit (ie each bit has a 2^n position in the whole count) so that as the count progresses. This way each of the 9 tests will have been performed half the tests in the 0 branch and half in the 1 branch.

If it is 0 then do x, otherwise do y type of thing.

The application is worst-case circuit analysis: https://k6jca.blogspot.c...-worst-case-circuit.html

Half the tests with the +% tolerance applied the other half with the -ve tolerance applied.

Edited by user 29 December 2022 21:24:05(UTC)  | Reason: Not specified

Offline marks2c  
#11 Posted : 29 December 2022 21:12:34(UTC)
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Originally Posted by: overlord Go to Quoted Post
If I understood correctly;
You want a 9bit binary representation similar to 8084 cpu registers.
I must admit it is a highly specific request.

registers


Very close, thanks overloard.

I'm after an asynchronous 9-bit ripple-style counter that I can bit-test (or equivalent) 9 times during each loop, each time to do one of two actions half the time (ie calculated with each extreme of the tolerance) for worst-case circuit analysis.

This may be better achieved via dec2bin() with a constant 9-bit length output so that the 2^n check work consistently (ie string position tests).

FYI (reference only): https://k6jca.blogspot.c...worst-case-circuit.html. The need is for X-Y style visualization that LTSpice can't provide.

Edited by user 29 December 2022 21:26:27(UTC)  | Reason: Not specified

Offline Razonar  
#12 Posted : 29 December 2022 21:39:13(UTC)
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Originally Posted by: marks2c Go to Quoted Post
...
This may be better achieved via dec2bin() with a constant 9-bit length output so that the 2^n check work consistently (ie string position tests).
...


Hi. Something like this?

Clipboard01.png

bin_counter.sm (10kb) downloaded 6 time(s).

Best regards.
Alvaro.
thanks 1 user thanked Razonar for this useful post.
on 29/12/2022(UTC)
Offline marks2c  
#13 Posted : 29 December 2022 21:40:56(UTC)
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Modification of Razonar's dec2bin() should work well.

dec2bin(p,q) where p is the bit-field length and q is the decimal number to be converted.

Check the converted string's length and then pad the front with zeros to suit.
Offline marks2c  
#14 Posted : 29 December 2022 21:44:09(UTC)
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Originally Posted by: Razonar Go to Quoted Post
Originally Posted by: marks2c Go to Quoted Post
...
This may be better achieved via dec2bin() with a constant 9-bit length output so that the 2^n check work consistently (ie string position tests).
...


Hi. Something like this?

Clipboard01.png

bin_counter.sm (10kb) downloaded 6 time(s).

Best regards.
Alvaro.


Cripes Alvaro. Good to see your 'calibrated-crystal-ball' and 'mind-reading skills' are as good as your awesome maths/coding skills!
Offline overlord  
#15 Posted : 30 December 2022 02:46:04(UTC)
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Maybe this can be useful.
Regards

dec2bin.sm (4kb) downloaded 7 time(s).

2022-12-30_02-45.png
thanks 1 user thanked overlord for this useful post.
on 30/12/2022(UTC)
Offline marks2c  
#16 Posted : 30 December 2022 03:04:15(UTC)
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Originally Posted by: overlord Go to Quoted Post
Maybe this can be useful.
Regards

dec2bin.sm (4kb) downloaded 7 time(s).

2022-12-30_02-45.png


Perfect! Thank you overlord
Offline marks2c  
#17 Posted : 30 December 2022 05:03:42(UTC)
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I spoke too soon! Bit-testing don't work so well on a string.

A much better idea is a column vector with each of the 9 (ie n#) elements being either a one or a zero.

Edited by user 30 December 2022 05:09:13(UTC)  | Reason: Not specified

Offline overlord  
#18 Posted : 30 December 2022 11:09:06(UTC)
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Originally Posted by: marks2c Go to Quoted Post
A much better idea is a column vector

This was what I coded first, after that I made it to string.
Here is what you have asked for.

Regards

dec2bin.sm (7kb) downloaded 7 time(s).

2022-12-30_11-07.png
thanks 1 user thanked overlord for this useful post.
on 30/12/2022(UTC)
Offline marks2c  
#19 Posted : 30 December 2022 12:39:01(UTC)
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Thank you so much overlord, that is both elegant and perfect!
Offline Jean Giraud  
#20 Posted : 30 December 2022 17:05:26(UTC)
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Originally Posted by: marks2c Go to Quoted Post
I spoke too soon! Bit-testing don't work so well on a string.
A much better idea is a column vector with each of the 9 (ie n#) elements being either a one or a zero.

Maybe, that's what you are looking for ?

Maths Convert num2str EXTENDED.sm (7kb) downloaded 7 time(s).

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