Attaching the map contour level to the mouse scroll wheel was one of the
most transformative things that Paul did in coot - giving access to the
most crucial parameter of map building with an unthinking twitch of the
finger.
On 03/05/2022 14:32, Paul Emsley wrote:
On 02/05/2022 20:19, Dale Tronrud wrote:
When I watch people model building I see many scrolling the
contour level up and down without regard for the numeric value of the
level, apparently just choosing a value that makes the peaks appear
the way they prefer the peaks to appear.
I recall a few years ago that Alex McPherson asked me how I chose the
contour level and I said more or less this. He didn't like my answer :-).
This way of choosing a contour level seems dangerous to me as it
seems to bias the appearance of the map towards the modeler's
expectation.
I don't choose one level and don't recommend that others do so - the
continuous re-contouring allow one to get a feel for where the signal
descends into noise - so I am scrolling very frequently when deciding
where a side-chain should go. I hum the Rawhide theme tune as I do so.
Paul.
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