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Math Help - Finding peaks on a curve

  1. #1
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    Finding peaks on a curve

    Hello,

    I have a variable number of points (not more than 10) - which are probability values. Amongst these points some of them refer to the peaks on the curve if the points are fit on a curve. I want to find the points that represent the peaks on the curve. Is there a simple way to find the peaks? Do I need to do any curve fitting first to spot the peaks?

    Thanks..
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by malaguena View Post
    Hello,

    I have a variable number of points (not more than 10) - which are probability values. Amongst these points some of them refer to the peaks on the curve if the points are fit on a curve. I want to find the points that represent the peaks on the curve. Is there a simple way to find the peaks? Do I need to do any curve fitting first to spot the peaks?

    Thanks..
    I'm afraid we would need to know a lot more about the data than you have posted to make any sensible suggestions.

    CB
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  3. #3
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    Quote Originally Posted by CaptainBlack View Post
    I'm afraid we would need to know a lot more about the data than you have posted to make any sensible suggestions.

    CB

    The problem is to find the split points in a word (morphological segmentation). For each split point, my model assigns a probability. The word is to be split at the points where the probabilities are high. For example, in the word "walkings", there are 8 possible split points that each has got a probability. The point after "s", and the point after "ing" are expected to be comparably higher than others.

    To give an idea an array of logarithms of these probabilities could be:

    1093180.2921060047 -1099512.0227943386 -1095977.4780250955 **** -1101739.5058371008 -1103636.1269468896 -1103636.1269468896 -1103636.1269468896 -1103636.1269468896 -1103636.1269468896 - 1096910.8541777392 **** -1103636.1269468896 -1103636.1269468896

    Here the split points that need to be found are marked with ****.

    Thanks a lot in advance.
    Last edited by malaguena; May 9th 2011 at 06:30 AM.
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  4. #4
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    After adjusting the values, now I have a large set of values from which I need to find the local maxima. Do I need to do any curve fitting for that. I don't know what shape the curve has got. I have around 100.000 values which are positive values. And just I want to find the local maxima values.

    Any idea is highly appreciated!
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