Dear R-users

>prob <- c(0.5,0.4,0.3,0.1,0.0)
>cal <- prob * log(prob,base=2)
>cal
[1] -0.5000000 -0.5287712 -0.5210897 -0.3321928        NaN

Is there any way to change NaN to zero ?

Thank you

Taka

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