Histogram
Shimazaki and Shinomoto's choice

The choice is based on minimization of an estimated L risk function

where m ¯ {\displaystyle \textstyle {\bar {m}}} and v {\displaystyle \textstyle v} are mean and biased variance of a histogram with bin-width h {\displaystyle \textstyle h}, m ¯ = 1 k ∑ i = 1 k m i {\displaystyle \textstyle {\bar {m}}={\frac {1}{k}}\sum _{i=1}^{k}m_{i}} and v = 1 k ∑ i = 1 k (m i − m ¯) 2 {\displaystyle \textstyle v={\frac {1}{k}}\sum _{i=1}^{k}(m_{i}-{\bar {m}})^{2}}.
detectable_content:number_placeholders[4], detectable_format:title