The manual suggests the log opcode has an optional arbitrary ibas parameter when using arrays:

log — Returns a natural log of a number, or an array (with optional arbitrary base)

kout[]log kin[],ibas

https://csound.com/docs/manual/log.html

When attempting to use the ibas parameter it results in an error: Unable to find opcode entry for 'log' with matching arguement types. Found: k log ki

instr 1
  kVal[]  fillarray 27
  kLog[]  init 1
  iBase = 3
  kLog[0] log kVal[0], iBase
  printk 1, kLog[0]
endin

Can anyone suggest where the syntax is incorrect in this code? Using a kBase doesn't work either (error k log kk).

Best,
Scott

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I don’t see this opcode anywhere in the system, I’ve only seen log() with 1 argument (for any rate and for i/k arrays).
I’ve implemented the array version but I don’t remember doing the 2 argument version. The source code only
contains the 1 input version. You will need to convert from the required base to either log, log2 or log10.

John’s name is in the docs so maybe he has more ideas about this.
========================
Prof. Victor Lazzarini
Maynooth University
Ireland

> On 4 Nov 2023, at 01:45, Scott Daughtrey  wrote:
>
> *Warning*
>
> This email originated from outside of Maynooth University's Mail System. Do not reply, click links or open attachments unless you recognise the sender and know the content is safe.
>
> The manual suggests the log opcode has an optional arbitrary ibas parameter when using arrays:
>
> log — Returns a natural log of a number, or an array (with optional arbitrary base)
>
> kout[]log kin[],ibas
>
> https://csound.com/docs/manual/log.html
>
> When attempting to use the ibas parameter it results in an error: Unable to find opcode entry for 'log' with matching arguement types. Found: k log ki
>
> instr 1
>  kVal[]  fillarray 27
>  kLog[]  init 1
>  iBase = 3
>  kLog[0] log kVal[0], iBase
>  printk 1, kLog[0]
> endin
>
> Can anyone suggest where the syntax is incorrect in this code? Using a kBase doesn't work either (error k log kk).
>
> Best,
> Scott
>
> Csound mailing list
> Csound@listserv.heanet.ie
> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> Send bugs reports to
>        https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here


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Hi Scott,
it's just an idea, but in your code you used something like:
kLog[0] log kArray[0], iBase
But you said that the iBase arguments is for arrays only, so it should read:
kLog log kArray, iBase
No indices, because then the opcode will not see arrays, but one k-rate 
signal.

HTH.

Best wishes,

Jeanette

-- 
  * Website: http://juliencoder.de - for summer is a state of sound
  * Youtube: https://www.youtube.com/channel/UCMS4rfGrTwz8W7jhC1Jnv7g
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There is now an opcode like that in Csound 7 (develop branch).
========================
Prof. Victor Lazzarini
Maynooth University
Ireland

> On 4 Nov 2023, at 10:31, Victor Lazzarini  wrote:
>
> I don’t see this opcode anywhere in the system, I’ve only seen log() with 1 argument (for any rate and for i/k arrays).
> I’ve implemented the array version but I don’t remember doing the 2 argument version. The source code only
> contains the 1 input version. You will need to convert from the required base to either log, log2 or log10.
>
> John’s name is in the docs so maybe he has more ideas about this.
> ========================
> Prof. Victor Lazzarini
> Maynooth University
> Ireland
>
>> On 4 Nov 2023, at 01:45, Scott Daughtrey  wrote:
>>
>> *Warning*
>>
>> This email originated from outside of Maynooth University's Mail System. Do not reply, click links or open attachments unless you recognise the sender and know the content is safe.
>>
>> The manual suggests the log opcode has an optional arbitrary ibas parameter when using arrays:
>>
>> log — Returns a natural log of a number, or an array (with optional arbitrary base)
>>
>> kout[]log kin[],ibas
>>
>> https://csound.com/docs/manual/log.html
>>
>> When attempting to use the ibas parameter it results in an error: Unable to find opcode entry for 'log' with matching arguement types. Found: k log ki
>>
>> instr 1
>> kVal[]  fillarray 27
>> kLog[]  init 1
>> iBase = 3
>> kLog[0] log kVal[0], iBase
>> printk 1, kLog[0]
>> endin
>>
>> Can anyone suggest where the syntax is incorrect in this code? Using a kBase doesn't work either (error k log kk).
>>
>> Best,
>> Scott
>>
>> Csound mailing list
>> Csound@listserv.heanet.ie
>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>> Send bugs reports to
>>       https://github.com/csound/csound/issues
>> Discussions of bugs and features can be posted here
>
>
> Csound mailing list
> Csound@listserv.heanet.ie
> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> Send bugs reports to
>        https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here


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Hi Scott,
oh a few opcodes use the [] symbols to mark arrays, but mostly when an array 
is a choice:
For example linlin:
https://csound.com/manual/linlin.html
And others. A few random number generators, I think, other matyhematical 
functions, if one needs them. Though with basic maths working with direct 
operators probably looks more straightforward.

Best wishes,

Jeanette

-- 
  * Website: http://juliencoder.de - for summer is a state of sound
  * Youtube: https://www.youtube.com/channel/UCMS4rfGrTwz8W7jhC1Jnv7g
  * Audiobombs: https://www.audiobombs.com/users/jeanette_c
  * GitHub: https://github.com/jeanette-c

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What I adore <3
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Thanks Victor, fortunately problem solved (user error =)).

Best, 

Scott

On Sat, Nov 4, 2023, 9:46 a.m. Victor Lazzarini <Victor.Lazzarini@mu.ie> wrote:

There is now an opcode like that in Csound 7 (develop branch).
========================
Prof. Victor Lazzarini
Maynooth University
Ireland

> On 4 Nov 2023, at 10:31, Victor Lazzarini <Victor.Lazzarini@mu.ie> wrote:
>
> I don’t see this opcode anywhere in the system, I’ve only seen log() with 1 argument (for any rate and for i/k arrays).
> I’ve implemented the array version but I don’t remember doing the 2 argument version. The source code only
> contains the 1 input version. You will need to convert from the required base to either log, log2 or log10.
>
> John’s name is in the docs so maybe he has more ideas about this.
> ========================
> Prof. Victor Lazzarini
> Maynooth University
> Ireland
>
>> On 4 Nov 2023, at 01:45, Scott Daughtrey <stunes6556@GMAIL.COM> wrote:
>>
>> *Warning*
>>
>> This email originated from outside of Maynooth University's Mail System. Do not reply, click links or open attachments unless you recognise the sender and know the content is safe.
>>
>> The manual suggests the log opcode has an optional arbitrary ibas parameter when using arrays:
>>
>> log — Returns a natural log of a number, or an array (with optional arbitrary base)
>>
>> kout[]log kin[],ibas
>>
>> https://csound.com/docs/manual/log.html
>>
>> When attempting to use the ibas parameter it results in an error: Unable to find opcode entry for 'log' with matching arguement types. Found: k log ki
>>
>> instr 1
>> kVal[]  fillarray 27
>> kLog[]  init 1
>> iBase = 3
>> kLog[0] log kVal[0], iBase
>> printk 1, kLog[0]
>> endin
>>
>> Can anyone suggest where the syntax is incorrect in this code? Using a kBase doesn't work either (error k log kk).
>>
>> Best,
>> Scott
>>
>> Csound mailing list
>> Csound@listserv.heanet.ie
>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>> Send bugs reports to
>>       https://github.com/csound/csound/issues
>> Discussions of bugs and features can be posted here
>
>
> Csound mailing list
> Csound@listserv.heanet.ie
> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> Send bugs reports to
>        https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here


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Csound for Android ver 39 with library ver 6.18. The recent update M Gogins released.

On Sat, Nov 4, 2023, 9:37 p.m. Victor Lazzarini <Victor.Lazzarini@mu.ie> wrote:

Thanks. Which version were you using?

Prof. Victor Lazzarini

Maynooth University

Ireland

On 4 Nov 2023, at 18:18, ST Music <stunes6556@gmail.com> wrote:



Thanks Victor, fortunately problem solved (user error =)).

Best, 

Scott

On Sat, Nov 4, 2023, 9:46 a.m. Victor Lazzarini <Victor.Lazzarini@mu.ie> wrote:

There is now an opcode like that in Csound 7 (develop branch).
========================
Prof. Victor Lazzarini
Maynooth University
Ireland

> On 4 Nov 2023, at 10:31, Victor Lazzarini <Victor.Lazzarini@mu.ie> wrote:
>
> I don’t see this opcode anywhere in the system, I’ve only seen log() with 1 argument (for any rate and for i/k arrays).
> I’ve implemented the array version but I don’t remember doing the 2 argument version. The source code only
> contains the 1 input version. You will need to convert from the required base to either log, log2 or log10.
>
> John’s name is in the docs so maybe he has more ideas about this.
> ========================
> Prof. Victor Lazzarini
> Maynooth University
> Ireland
>
>> On 4 Nov 2023, at 01:45, Scott Daughtrey <stunes6556@GMAIL.COM> wrote:
>>
>> *Warning*
>>
>> This email originated from outside of Maynooth University's Mail System. Do not reply, click links or open attachments unless you recognise the sender and know the content is safe.
>>
>> The manual suggests the log opcode has an optional arbitrary ibas parameter when using arrays:
>>
>> log — Returns a natural log of a number, or an array (with optional arbitrary base)
>>
>> kout[]log kin[],ibas
>>
>> https://csound.com/docs/manual/log.html
>>
>> When attempting to use the ibas parameter it results in an error: Unable to find opcode entry for 'log' with matching arguement types. Found: k log ki
>>
>> instr 1
>> kVal[]  fillarray 27
>> kLog[]  init 1
>> iBase = 3
>> kLog[0] log kVal[0], iBase
>> printk 1, kLog[0]
>> endin
>>
>> Can anyone suggest where the syntax is incorrect in this code? Using a kBase doesn't work either (error k log kk).
>>
>> Best,
>> Scott
>>
>> Csound mailing list
>> Csound@listserv.heanet.ie
>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>> Send bugs reports to
>>       https://github.com/csound/csound/issues
>> Discussions of bugs and features can be posted here
>
>
> Csound mailing list
> Csound@listserv.heanet.ie
> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> Send bugs reports to
>        https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here


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I see now; there was no such opcode for i-time arrays (only for k-rate) and that was what tripped me.
Now I’ve added the i-time version to Csound 7.0 only (and removed the k-rate duplicate I had committed).
========================
Prof. Victor Lazzarini
Maynooth University
Ireland

> On 4 Nov 2023, at 18:10, ST Music  wrote:
> 
> Thanks Jeanette! That works for me. So basically it works on the whole array, not just individual indices. The manual description seems a little misleading, or perhaps I'm just a bit dimwitted ;)
> 
> However, with most other array opcodes it's defined in the manual, such as maparray:
> karray maparray kinarray, String
> 
> So it's a little unusual that log uses the array symbols:
> kout[]log kin[][,ibas]
> 
> Anyways, this works great now: 
> instr 1
>   kVal[]  fillarray, 9, 27, 81
>   kLog[]  init 3
>   iBase = 3
>   kLog log kVal, iBase
>   printk 1, kLog[1]
>   printarray kLog, metro(1)
> endin
> 
> Thanks again for your help =)
> 
> Best, 
> Scott
> 
> On Sat, Nov 4, 2023, 9:46 a.m. Victor Lazzarini  wrote:
> There is now an opcode like that in Csound 7 (develop branch).
> ========================
> Prof. Victor Lazzarini
> Maynooth University
> Ireland
> 
> > On 4 Nov 2023, at 10:31, Victor Lazzarini  wrote:
> >
> > I don’t see this opcode anywhere in the system, I’ve only seen log() with 1 argument (for any rate and for i/k arrays).
> > I’ve implemented the array version but I don’t remember doing the 2 argument version. The source code only
> > contains the 1 input version. You will need to convert from the required base to either log, log2 or log10.
> >
> > John’s name is in the docs so maybe he has more ideas about this.
> > ========================
> > Prof. Victor Lazzarini
> > Maynooth University
> > Ireland
> >
> >> On 4 Nov 2023, at 01:45, Scott Daughtrey  wrote:
> >>
> >> *Warning*
> >>
> >> This email originated from outside of Maynooth University's Mail System. Do not reply, click links or open attachments unless you recognise the sender and know the content is safe.
> >>
> >> The manual suggests the log opcode has an optional arbitrary ibas parameter when using arrays:
> >>
> >> log — Returns a natural log of a number, or an array (with optional arbitrary base)
> >>
> >> kout[]log kin[],ibas
> >>
> >> https://csound.com/docs/manual/log.html
> >>
> >> When attempting to use the ibas parameter it results in an error: Unable to find opcode entry for 'log' with matching arguement types. Found: k log ki
> >>
> >> instr 1
> >> kVal[]  fillarray 27
> >> kLog[]  init 1
> >> iBase = 3
> >> kLog[0] log kVal[0], iBase
> >> printk 1, kLog[0]
> >> endin
> >>
> >> Can anyone suggest where the syntax is incorrect in this code? Using a kBase doesn't work either (error k log kk).
> >>
> >> Best,
> >> Scott
> >>
> >> Csound mailing list
> >> Csound@listserv.heanet.ie
> >> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> >> Send bugs reports to
> >>       https://github.com/csound/csound/issues
> >> Discussions of bugs and features can be posted here
> >
> >
> > Csound mailing list
> > Csound@listserv.heanet.ie
> > https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> > Send bugs reports to
> >        https://github.com/csound/csound/issues
> > Discussions of bugs and features can be posted here
> 
> 
> Csound mailing list
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> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports tohttps://github.com/csound/csound/issues Discussions of bugs and features can be posted here



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