Why do I get values above 1 in ksdensity?

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Marouen 2016-10-13

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https://ww2.mathworks.cn/matlabcentral/answers/307196-why-do-i-get-values-above-1-in-ksdensity

回答： Marouen 2016-10-14

Hi everyone, I've been plotting a ksdensity on a variable distribution, I noticed on the y axis values above 1. Isn't supposed to be a [0-1] probability of occurence of the xaxis value? Thanks

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Answer 1

Walter Roberson 2016-10-13

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https://ww2.mathworks.cn/matlabcentral/answers/307196-why-do-i-get-values-above-1-in-ksdensity#answer_238868

ksdensity is Probability Density, about which https://en.wikipedia.org/wiki/Probability_density_function#Further_details

"Unlike a probability, a probability density function can take on values greater than one; for example, the uniform distribution on the interval [0, ½] has probability density f(x) = 2 for 0 ≤ x ≤ ½ and f(x) = 0 elsewhere."