[Scilab-users] spectrogram

[Claus Futtrup]

Hi all

An Amplitude(time,frequency) plot should be named Spectrogram. That's 
the official name for it.

 >mapsound(), which plots a spectrogram without numerical information

I didn't check, but if this is true, then an improvement as proposed by 
Federico would be good.

Best regards,
Claus

On 12-07-2021 11:38, Samuel Gougeon wrote:
> Hello Federico,
>
> As reported at http://bugzilla.scilab.org/16530 , mapsound() could not 
> really be used.
> It has been rewritten in Scilab 6.1.1.
> It's help page in PDF is available at 
> http://bugzilla.scilab.org/attachment.cgi?id=5178
> To be compared to the last 6.1.0 former version 
> https://help.scilab.org/docs/6.1.0/fr_FR/mapsound.html
>
> It could be still improved later with additional suggested features.
>
> Regards
>
> Samuel
>
> PS : A redirection mechanism to be set in user's preferences has been 
> implemented in Scilab 6.1.1
> to automatically redirect help queries in the help browser toward the 
> most relevant page, as uman() does.
> It has been designed first to help scilab newbies coming from other 
> languages, but can also be used
> for other common terms.
> Even if it is not "standard", mapsound is explicit enough, in the 
> right help section,  and OK to me.
> So we could redirect spectrogram to mapsound.
>
> Le 12/07/2021 à 01:21, Federico Miyara a écrit :
>>
>> Dear All,
>>
>> I noticed there is no spectrogram function in Scilab that provides 
>> both graphic and numerical output. There is a function mapsound(), 
>> which plots a spectrogram without numerical information and without 
>> control over important aspects such has FFT length or windowing 
>> function. By the way, in the field of digital sound processing the 
>> usual name for this is spectrogram, not mapsound, which is a bit 
>> confusing.
>>
>> I created a spectrogram() function. Even if it doesn't yet comply 
>> with the recommended style for Scilab functions (particularly 
>> regarding error handling or manual page), I think it might be useful 
>> for some users. I attach the function and a test script.
>>
>> Regards,
>>
>> Federico Miyara
>
>
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