Appion

added additional statistics in stack making, including:

• min
• max
• skew
• kurtosis
• edgemean
• edgestdev
• centermean
• centerstdev.

Tested on a couple of projects. Fixed in revision r13049. Had to fix a function r13048 in source:trunk/pyami/imagefun.py to make sure filled_circle actually used the center of an array.

Two things:
1. Is (box/2.0-1.0) supposed to be the radius of the shape? I don't understand what this calculates.
2. I like that the circle center calc is changed to a float, but why subtract .5?

I like it when magic numbers are explained in the code so I don't go messing it up after you are gone!

The 0.5 was really based on testing, but to get the the center of a NxN array where N is even the center is (N/2 - 1/2), the half pixel shift is because the array size is even, which required for EMAN. So the center of a 2x2 box is (0.5,0.5) the gap in between the pixels. For the odd array 3x3, the center is a whole pixel namely (1,1).

0,0 1,0
0,1 1,1 --> 0.5, 0.5 is center

0,0 1,0 2,0
0,1 1,1 2,1
0,2 1,2 2,2 --> 1,1 is center

You are right I should explain this in the code, but I have no SVN access at the moment.

There is not a good way to test this other than examining the database. It provides stats that may be useful in the future.