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 01172012, 03:03 PM #1Member
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 01172012, 04:33 PM #2
Re: Do number series represent sine wave?
How would you do this by hand, without a computer?
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 01172012, 05:08 PM #3Member
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Re: Do number series represent sine wave?
I can only think of plotting a graph and seeing it !
 01172012, 05:38 PM #4
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Re: Do number series represent sine wave?
Try an autocorrelation (google is your friend here) on the signal and the signal itself, shifted n samples. For the value of n where the correlation is at its maximum you have found the frequency of the sine, i.e. n*st where st is the sample time.
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JosI have the stamina of a seal; I lie on the beach instead of running on it.
 01172012, 05:45 PM #5Member
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Re: Do number series represent sine wave?
Thanks. I am checking google.
 01182012, 10:33 AM #6Member
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Re: Do number series represent sine wave?
It is surprising that one needs complex programs and algorithms to identify even simple shapes. Is there any simple method to differentiate between 2 sets of points which on plotting show simple shapes of V and U respectively.
 01182012, 10:38 AM #7
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Re: Do number series represent sine wave?
Try the NN aproach (Neural Network). A BAM (Bidirectional Associative Memory) or Kohonen network are quite suitable. Hopfield networks have too low storage capacity for image recognition. Beware though: this isn't trivial and maybe, after you've struggled your way through it, you'll appreciate simple eyes and the brain's processing power ;)
kind regards,
JosI have the stamina of a seal; I lie on the beach instead of running on it.
 01182012, 12:04 PM #8Member
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Re: Do number series represent sine wave?
Thanks for your suggestions. Can you recommend some website/software to quickly get started in using neural networks for simple problem like I stated above?
 01182012, 01:16 PM #9
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Re: Do number series represent sine wave?
Google for "character recognition Java".
kind regards,
JosI have the stamina of a seal; I lie on the beach instead of running on it.
 01182012, 01:33 PM #10Moderator
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 01182012, 04:05 PM #11
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 01182012, 04:36 PM #12Moderator
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Re: Do number series represent sine wave?
Think of them like disposable contact lenses.
See?
Nature's waay ahead of us on these things.
 01182012, 04:46 PM #13
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