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#26 2012-09-22 02:39:06

tina123
Member
Registered: 2012-04-29
Posts: 83

Re: detect peaks and valleys

tina123 wrote:
bobbym wrote:

Do you see what a peak is?

as i understand peak is maximum value ..  and 20 , 21 are the maximum . .

so those are peaks

Oh yar we are still not able to decide .

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#27 2012-09-22 02:42:10

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,654

Re: detect peaks and valleys

Hi;

I drew arrows to the peaks in post #20.

To decide you need the data.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#28 2012-09-22 03:06:17

tina123
Member
Registered: 2012-04-29
Posts: 83

Re: detect peaks and valleys

hy no .. . How did say that its peak . We can see it graphically ,
but i still do't understand how can say its out peak .

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#29 2012-09-22 03:10:52

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,654

Re: detect peaks and valleys

Do you have the data values? That is how you determine it.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#30 2012-09-22 03:13:10

tina123
Member
Registered: 2012-04-29
Posts: 83

Re: detect peaks and valleys

yes i already showed u data values in my #post 1 .

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#31 2012-09-22 03:15:47

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,654

Re: detect peaks and valleys

Count up each type of data value the way I did in post #4. That is how you get those peaks and valleys. You do not need the histogram.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#32 2012-09-22 03:17:15

tina123
Member
Registered: 2012-04-29
Posts: 83

Re: detect peaks and valleys

bobbym wrote:

Count up each type of data value the way I did in post #4. That is how you get those peaks and valleys. You do not need the histogram.

Oh u are making me confuse . leave it . now .
I need to work with  histogram .

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#33 2012-09-22 03:23:11

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,654

Re: detect peaks and valleys

The histogram is for the eye to get an idea what the data looks like. The data itself is the best thing.

Look at post #4, the data.

There
4 ones
1 two
1 three
3 fours

you do the rest. You will see there are more ones than anything else. That is a peak.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#34 2012-09-30 04:13:30

tina123
Member
Registered: 2012-04-29
Posts: 83

Re: detect peaks and valleys

hy Bobby, from post #1, how can we get probability  ?

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#35 2012-09-30 04:30:54

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,654

Re: detect peaks and valleys

Hi;


Yes, those are peaks.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Offline

#36 2012-09-30 04:35:09

tina123
Member
Registered: 2012-04-29
Posts: 83

Re: detect peaks and valleys

ok but i am asking about probability .
How can we compute probability of each bin ?
Also how  can we compute Bayesian formula in histogram post #1 . 
As Bayesian formula can show that posterior probability is proportional to density value .

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#37 2012-09-30 04:39:42

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,654

Re: detect peaks and valleys

Hi;

Just take how many is in that bin and divide it by the total number.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Offline

#38 2012-09-30 04:42:06

tina123
Member
Registered: 2012-04-29
Posts: 83

Re: detect peaks and valleys

and how about Bayesian formula in histogram post@1 .
As Bayesian formula can show that posterior probability is proportional to density value .
That's y i am interested in Bayesian formula .

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#39 2012-09-30 05:17:40

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,654

Re: detect peaks and valleys

Hi tina123;

I do not understand either term. You will have to explain to me what they mean.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Offline

#40 2012-09-30 05:39:03

tina123
Member
Registered: 2012-04-29
Posts: 83

Re: detect peaks and valleys

hy ,, its a just Bayes theorem on histogram data .

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#41 2012-09-30 05:54:07

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,654

Re: detect peaks and valleys

Hi;

I am sorry but I can not apply Bayes theorem here. What question is being asked? I do not know. Hard enough to solve a problem but having to guess at what it is, is too tough.

Please go here so you can ask a specific problem:

http://en.wikipedia.org/wiki/Bayes%27_theorem


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Offline

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