MATLAB Central Newsreader - min function

min function

ching l — Thu, 24 Jul 2008 14:39:03 -0400

[audio, fs] = wavread('F:\audio.wav');
samples{6} = {audio, fs};

[audio, fs] = wavread('F:\audio.wav');
samples{10} = {audio, fs};

playback= ceil(length(samples)*rand);

How do I put the minimum value for "playback". I've tried
the min function, but just can't get it right. Need a bit of
help here. Not sure how to put it in right order.

Thanks.

Re: min function

roberson@ibd.nrc-cnrc.gc.ca (Walter Roberson) — Thu, 24 Jul 2008 17:29:25 -0400

In article <g6a467$dtq$1@fred.mathworks.com>,
ching l <chinglnc@hotmail.com> wrote:

>[audio, fs] = wavread('F:\audio.wav');
>samples{6} = {audio, fs};

>[audio, fs] = wavread('F:\audio.wav');
>samples{10} = {audio, fs};

>playback= ceil(length(samples)*rand);

>How do I put the minimum value for "playback". I've tried
>the min function, but just can't get it right. Need a bit of
>help here. Not sure how to put it in right order.

Please expand on what you mean by 'How do I put the minimum value
for "playback"' ? The variable playback will be a scalar value there,
and so is its own minimum.

If you want to know what the minimum value is that you have ever
had generated, then you will have to keep track of the 'playback'
values somehow. For example,

persistent minplaybackvalue
if isempty(minplaybackvalue)
  minplaybackvalue = playback;
else
  minplaybackvalue = min(minplaybackvalue, playback);
end

--
  "If there were no falsehood in the world, there would be no
  doubt; if there were no doubt, there would be no inquiry; if no
  inquiry, no wisdom, no knowledge, no genius."
                                              -- Walter Savage Landor

Re: min function

Bruno Luong — Thu, 24 Jul 2008 17:56:03 -0400

"ching l" <chinglnc@hotmail.com> wrote in message
<g6a467$dtq$1@fred.mathworks.com>...
> [audio, fs] = wavread('F:\audio.wav');
> samples{6} = {audio, fs};
>
> [audio, fs] = wavread('F:\audio.wav');
> samples{10} = {audio, fs};
>
> playback= ceil(length(samples)*rand);
>
> How do I put the minimum value for "playback". I've tried
> the min function, but just can't get it right. Need a bit of
> help here. Not sure how to put it in right order.
>
> Thanks.
>

It's kind of count intuitive for normal people, I know, but
if you wants to force a minimum value under which the
playback values should not go below, then you should use 'max'.

% Bruno