maximum values and their duration

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mikailis

maximum values and their duration

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in Programming Questions • 3 years ago

Hello Processing forum,

Even if i got some help through my first question, it wasnt really what i was looking for.
So i will make a more simple question.

for every draw() i am having x values. From those values i am getting only the xmax values.

How can i find the time difference between xmax1 and xmax 2 (but not x1 and x2) or
when xmax appear start a counter untill xmax 2.

My first post was http://forum.processing.org/topic/fft-and-duration

i hope this one is more clear,

Thank you

Replies(6)

bjordal

Re: maximum values and their duration

3 years ago

but what is max2? is max2 > max1 or is max2 = max1? Or is max2 just the next maximum value?

mikailis

Re: maximum values and their duration

3 years ago

Hello bjordal

exactly, max2 is just the next maximum value so i just need to find how much time max1 last.
and then count from zero again untill max 3.

The condition of how i find the maximum values is the simple

max = 0;
for (int i=0;i<=(number of values);i++)
{
if(i>max)
max=i
}

Thanks for the reply

bjordal

Re: Re: maximum values and their duration

3 years ago

but then the time between two maximum values will always be one frame, since you create a new maximum every frame

mikailis

Re: maximum values and their duration

3 years ago

Thats true...

What i forget to mention and i apologize for that is that my purpose is to
count how much time (or frames) max1 (for example) will stay the same.
With my sketch i can see on the monitor that for some frames i get the same max value.(from an audio input)
How can i calculate these?

Should i make a comparison between max values?
And where exactly should i make this comparison? Should it be inside "for"?

Sorry for this silly questions but i know very little about coding.

Thank you in advance,

bjordal

Re: Re: maximum values and their duration

3 years ago

...but if you know "very little about coding" why are you working with audio...

anyways if you just want to know how long the max value stays the same then something like this should do:

int maxValueStartTime;
float maxValue;
void setup(){
//do setup stuff like size and etc;
maxValueStartTime = millis();
maxValue = 0;
}
void draw(){
float maxValueForThisFrame;
//Run some code that finds the max value and then stores the current max value in
// the variable called maxValueForThisFrame.
if(maxValuesForThisFrame != maxValue){
//the max value is no longer the same
println( millis()-maxValueStartTime); //this will be the time that the max value lasted
//reset
maxValueStartTime = millis();
maxValue = maxValuesForThisFram;
}
}

mikailis

Re: maximum values and their duration

3 years ago

Thank you bjordal..

Your solution was very helpful and it worked.

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