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    Senior Member abstractform20's Avatar
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    Determining Median and Modal Speed

    best method(s)? i have a century coming up

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    Why in the world do you want to know the modal and median instead of the average???

    Modal is the data that repeats the most and obviously you have to take your times and speed often to do that. So if you stop 30 times you have 30 speeds between stops... pick the one that repeats the most, thats your modal speed.

    The median is the value that is just in the middle... same problem, you have to stop and take your times and speeds in intervals, do the math and pick the data that is just in the middle. If you stop 20 times... calculate the speed between each of those stops, put them in order at the end of the trip and pick the data that is number 10... done.

    The modal speed and the median speed might not be the same obviously either way I dont understand why you want to do this tho... well there you have it... good luck.

  3. #3
    comin' in hot James1:17's Avatar
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    is this thing on?

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    Senior Member abstractform20's Avatar
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    im just training for a century and want to know these, so i can correlate it to my heart rate per zone.

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    Quote Originally Posted by abstractform20 View Post
    im just training for a century and want to know these, so i can correlate it to my heart rate per zone.
    That's only going to work if it's dead flat, no wind, no stops, and you somehow control for dehydration.

    Good luck with all that.

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    If you had a garmin / powertap or other such setup, you could pretty easily find the mode by having it record speed every second, and then look at your speed distribution graph after your ride. In fact let me look... the ride I just did. First I told it to remove all ZEROS. Otherwise that it is most common speed in my file. Then I need to tell it the BIN width. If I tell it to graph it per every MPH evenly, my mode is clearly 19mph. The average speed for this ride was 17mph, btw. Oh but if I tell it to break speed down to the tenth of the MPH, the mode was 17.2. So there. Totally useless metric, I would say.

  7. #7
    Blissketeer HokuLoa's Avatar
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    Quote Originally Posted by abstractform20 View Post
    best method(s)? I have a century coming up

  8. #8
    Senior Member datlas's Avatar
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    Parody thread fail.

    Try again. Try harder.
    Quote Originally Posted by RUOkie View Post
    never underestimate the idiocy of BF.

  9. #9
    A might bewildered... Dudelsack's Avatar
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    I prefer Ionian modal speed but occasionally will use Phrygian modal speed.

  10. #10
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    what do you mean modal? average modal over time? or modal like that dragon-beast with the seven heads from Modal like Mothra aka Mothra vs. Godzilla?

    mothra.jpg

  11. #11
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    Histogram in WKO would make this easy - if you care

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    Senior Member abstractform20's Avatar
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    Quote Originally Posted by datlas View Post
    Parody thread fail.

    Try again. Try harder.
    i would write "fail" to you, but you apparently do not grasp what must occur for something to be considered a "fail".

    in a cruel realization of events, you = "fail"

  13. #13
    rugged individualist wphamilton's Avatar
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    You want modal and median speeds so that you can virtualize the century ride and vary specific parameters? Good idea.

    edited: it piques my interest because "modal" has some problems in this context, and I think it requires more of a clustering analysis than simple statistics. Clustering is difficult but interesting. Intuitively some application of particle swarm optimization may be effective.
    Last edited by wphamilton; 05-27-12 at 11:46 AM.

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    Senior Member abstractform20's Avatar
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    Quote Originally Posted by wphamilton View Post
    You want modal and median speeds so that you can virtualize the century ride and vary specific parameters? Good idea.
    it is, actually. when you can maintain 200 watts you will understand.

  15. #15
    rugged individualist wphamilton's Avatar
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    Quote Originally Posted by abstractform20 View Post
    it is, actually. when you can maintain 200 watts you will understand.
    Did you think I wasn't serious?

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    Quote Originally Posted by datlas View Post
    Parody thread fail.

    Try again. Try harder.
    I think its an attempt to sneak in another "average speed" thread by hinding it behind a fancy name.

  17. #17
    Senior Member Bishbike's Avatar
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    Quote Originally Posted by Dudelsack View Post
    I prefer Ionian modal speed but occasionally will use Phrygian modal speed.
    Superlocrian modal speed has been a favorite method.
    Last edited by Bishbike; 05-27-12 at 10:09 PM. Reason: spelling

  18. #18
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    i prefer the Fibonacci method of riding a century, but sometimes the golden rectangle is the best option.

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    Quote Originally Posted by JandersUF View Post
    First I told it to remove all ZEROS. Otherwise that it is most common speed in my file.
    I'd leave in the zeros.

    Quote Originally Posted by abstractform20 View Post
    it is, actually. when you can maintain 200 watts you will understand.
    I can maintain 200 watts but I don't understand. Perhaps you can explain it to me.

  20. #20
    Maximus
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    *sigh*

  21. #21
    Senior Member YOJiMBO20's Avatar
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    Quote Originally Posted by Bishbike View Post
    Superlocrian modal speed has been a favorite method.
    Nah, man. It's all about hypophrygian.
    2010 Litespeed Icon, Rival
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  22. #22
    rugged individualist wphamilton's Avatar
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    Quote Originally Posted by RChung View Post
    I'd leave in the zeros.


    I can maintain 200 watts but I don't understand. Perhaps you can explain it to me.
    Well, likewise but I'm letting that slide because a threshold like that wouldn't be particularly relevant to simulating the ride. In my estimation, without actually attempting a virtual simulation of a century.

  23. #23
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    Quote Originally Posted by wphamilton View Post
    Well, likewise but I'm letting that slide because a threshold like that wouldn't be particularly relevant to simulating the ride. In my estimation, without actually attempting a virtual simulation of a century.
    The duration (and quantity) of periods of zero power affects the duration (and level) of non-zero power.

  24. #24
    rugged individualist wphamilton's Avatar
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    Quote Originally Posted by RChung View Post
    The duration (and quantity) of periods of zero power affects the duration (and level) of non-zero power.
    I was talking about the "if you could hold 200 watts", not the zeros. There is no threshold for OP's idea (if that's what it was), and 200 watts would be arbitrary in any event.

  25. #25
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    I'm developing a new software package for cycling and thought I had all the bases covered -- FTP, IF and such. Now I'm hearing about things like "Superlocrian modal speed", "hypophrygian" and others I can't begin to pronounce. Is there a new book or web site I'm not aware of?

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