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

Can anyone please explain me formula of histogram defined in this wiki link

http://en.wikipedia.org/wiki/Histogram

We say that histogram is the counts of observation in bins.

So Let say if bins are from 0 to 179. then what does mean by mi in the formula?

i think n is the counts of observation.

Kindly, explain it. thanks

Expecting a fast response

Thanks

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 102,906

Hi;

Here is how I see it:

If n is the total number of observations, and k is the number of bins, then mi is the number in each bin or frequency.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

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

hmm .. and Who did define that formula?

I can need to know author and its paper. I can't find.

Please help me to know its writer and its paper where he defined the formula.

Thanks

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 102,906

Hi;

If I am right ( what are the chances ) it is self evident. It says add up what is in each bin and you should have the total number.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

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