difference between using max and length in histogram

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Josh
Josh 2014-7-25
评论： Image Analyst 2014-7-26
What it the difference between using max and length in histogram?

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Azzi Abdelmalek
Azzi Abdelmalek 2014-7-25
A=[1 2 10 3]
Try
max(A) % The greatest value in A
and
length(A) % number of element in A

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Josh
Josh 2014-7-25
Thank you, that's what I thought. I was working a problem and the resulting histogram is the same whether I use max(X) or length(X) which did not make sense to me, but since I was creating a vector using X(i) = sum(rand > cumsum(p))+1, I suppose in this case max(X) and length(X) are the same.
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Image Analyst
Image Analyst 2014-7-26
No. X(i) can be any integer value between 1 or and length(p)+1. Those values are independent of the max value of X since you could have different X(i). We don't know how long X is. For example, maybe X = [10, 30, 100, 4, 16], so length(X) = 5 while max(X) = 100. Rand is different for each i so that's why the values of X could be different for each i, and thus the max value is independent of the length, except in very coincidental cases.

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