To be extra clear/redundant:
>
> The default value passed is None. If Pymol finds that the argument is None,
> it takes the minimum/maximum value from the list of values,

...do you mean that it takes the minimum/maximum values from the list
of b-values from within that pdb file? So that for each pdb file, blue
vs. white vs. red (on a blue_white_red palette) could have very
different values from one file to the next (if the structures are
different in that respect)?

Emily.


otherwise it
> will take the value provided. The interpolation is indeed linear.
>
> Hope it helps,
>
> Tsjerk
>
> On Tue, Jul 7, 2015 at 4:11 AM, Emilia C. Arturo (Emily) <ec...@drexel.edu>
> wrote:
>>
>> Hello All.
>>
>> Can anyone tell me what values are assigned by default to the minimum
>> and maximum arguments of the spectrum command? To be clear, I know how
>> to change the value of these arguments, but what does PyMOL assign to
>> these values if one calls the spectrum tool using the pull-down menus
>> to color by b-factor (or does not include values for the minimum and
>> maximum arguments at the command line)?
>>
>> Does it assign the smallest b-factor found in that file to 'minimum',
>> and the highest b-value found to 'maximum', and then spreads the
>> values linearly according to the number of colors in the chosen
>> palette? I'd like for it to do that, and I'm sure it can be coded, but
>> first I'd like to find out the default approach. I am using a PyMOL
>> incentive package on my Mac.
>>
>> Regards,
>> Emily.
>>
>>
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>
>
>
>
> --
> Tsjerk A. Wassenaar, Ph.D.
>

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