g (/:[EMAIL PROTECTED]@[ { mean/.)&, gamma
----- Original Message -----
From: "Jacobs, Jan" <[EMAIL PROTECTED]>
Date: Tuesday, October 9, 2007 12:42
Subject: [Jprogramming] tacit solution wanted for the mean of quantisation
classes
To: [email protected]
> ls,
> I've a small grey-value bitmap (gamma) and a given class
> assignment (g),
> see below. I need to compute the class means, but sorted in normal
> order: first class 0, then 1 ...
> In the example below I assume 4 classes.
>
> mean=:+/%#
>
> g=:4|>:i.2 3 NB. sample quantisation states
> gamma=:?2 3$255 NB. sample grey-value bitmap
>
> mu=:(/:~.,g){(,g)mean/.,gamma
>
> Is there a nice tacit solution for these means (mu)?
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