[SciPy-user] concave and convex function

mudit sharma mudit_19a@yahoo....
Wed May 27 09:13:13 CDT 2009

Thanks Robert. I appreciate your response. 

I found the solution finally, which is, using Savitzky Golay filter for smoothing as it preserves the shape. Then using peak and trough points detection algorithm. Some useful links here:
http://terpconnect.umd.edu/~toh/spectrum/PeakFindingandMeasurement.htm. Unfortunately, all these matlab scripts so will have to write python equivalent.


----- Original Message ----
From: Robert Kern <robert.kern@gmail.com>
To: SciPy Users List <scipy-user@scipy.org>
Sent: Monday, 18 May, 2009 23:20:24
Subject: Re: [SciPy-user] concave and convex function

On Mon, May 18, 2009 at 02:57, Sebastian Walter
<sebastian.walter@gmail.com> wrote:
> On Sun, May 17, 2009 at 3:50 PM, mudit sharma <mudit_19a@yahoo.com> wrote:
>> Thanks for your response.
>> By M & W curve I meant M & W shape curves( subset ) and by cycle I meant wave cycle.
> Is that supposed to describe what is meant by M & W?

Peak-trough-peak and trough-peak-trough patterns, respectively, like
the shapes of the letters.

> No offense, but
> if you want help, you should
> state your problem in a way that other ppl understand....

His actual question is reasonably well-worded (he wants to classify
the signal into convex and concave portions), but you got distracted
by the irrelevant portion.

Robert Kern

"I have come to believe that the whole world is an enigma, a harmless
enigma that is made terrible by our own mad attempt to interpret it as
though it had an underlying truth."
  -- Umberto Eco
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