Plot of euler angle distribution

Submitted by mcianfrocco on Tue, 2012-03-27 20:35

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Frealign

I'd like to generate a plot of the euler angle distribution for my asymmetric FREALIGN-refined reconstruction. What are the most common ways of doing so in FREALIGN given that FREALIGN has refined the original euler angles?

Do people write scripts that go through and find all neighboring euler angles to group them together? If so, how do you go about doing this?

Many thanks,
Mike

xfu Tue, 2012-03-27 20:55

you can try the command "map-euler-angles" in IMAGIC, which needs an input plt file containing only the three euler angles, which can be extracted from your frealign refined par file like this "awk '{printf "%8.2f%8.2f%8.2f\n", $2,$3,$4}' your.par > your.plt". Then you can display the output in Imagic with the command "Display" and save as tif format.

mcianfrocco Wed, 2012-03-28 14:34

Thank you for your reply. Do you think I need to account for the fact that FREALIGN and IMAGIC use different euler angle conventions before plotting the euler angles in IMAGIC?

Thanks!

xfu Thu, 2012-03-29 09:33

As I know, IMAGIC and FREALIGN share the same both the euler rotation sequence Z-Y-Z and anclockwise for "+" angle. If this is thue, then you don't have to do any convention. You may need to make a test first.

Axel Thu, 2012-03-29 09:53

I have used the Imagic routine without conversion, and it seems to give a reasonable result.