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85 lines
3.4 KiB
Matlab
85 lines
3.4 KiB
Matlab
% [varargout] = find_capillary(varargin)
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%*-----------------------------------------------------------------------*
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%| |
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%| Except where otherwise noted, this work is licensed under a |
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%| Creative Commons Attribution-NonCommercial-ShareAlike 4.0 |
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%| International (CC BY-NC-SA 4.0) license. |
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%| |
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%| Copyright (c) 2017 by Paul Scherrer Institute (http://www.psi.ch) |
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%| |
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%| Author: CXS group, PSI |
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%*-----------------------------------------------------------------------*
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% You may use this code with the following provisions:
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%
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% If the code is fully or partially redistributed, or rewritten in another
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% computing language this notice should be included in the redistribution.
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%
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% If this code, or subfunctions or parts of it, is used for research in a
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% publication or if it is fully or partially rewritten for another
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% computing language the authors and institution should be acknowledged
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% in written form in the publication: “Data processing was carried out
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% using the “cSAXS matlab package” developed by the CXS group,
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% Paul Scherrer Institut, Switzerland.”
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% Variations on the latter text can be incorporated upon discussion with
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% the CXS group if needed to more specifically reflect the use of the package
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% for the published work.
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%
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% A publication that focuses on describing features, or parameters, that
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% are already existing in the code should be first discussed with the
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% authors.
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%
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% This code and subroutines are part of a continuous development, they
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% are provided “as they are” without guarantees or liability on part
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% of PSI or the authors. It is the user responsibility to ensure its
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% proper use and the correctness of the results.
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function [varargout] = find_capillary(varargin)
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import io.spec_read
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vararg = varargin;
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vararg{end+1} = 'UnhandledParError';
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vararg{end+1} = 0;
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[S] = spec_read(vararg{1},vararg{2:end});
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vararg = vararg(2:end);
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for jj = 1:2:length(vararg)
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name = vararg{jj};
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value = vararg{jj+1};
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switch name
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case 'Counter'
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counter = S.(value);
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end
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end
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arrout = regexp(S.S,' +','split');
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motor = S.(arrout{4});
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threshold = .1 * max(counter);
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motor = motor(counter>threshold);
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counter = counter(counter>threshold);
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threshold = .9 * max(counter);
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i_i = find(counter>threshold,1,'first');
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i_f = find(counter>threshold,1,'last');
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p = polyfit(motor(counter>threshold),counter(counter>threshold),1);
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dy = polyval(p,motor)-counter;
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COM = sum(motor(i_i:i_f).*dy(i_i:i_f))/sum(dy(i_i:i_f));
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do_plot = 0;
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if (do_plot)
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figure(1)
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plot(motor,dy)
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hold on
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area(motor(i_i:i_f),dy(i_i:i_f))
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plot([1 1]*COM,[0 max(dy(i_i:i_f))],'r','LineWidth',2)
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hold off
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end
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varargout{1} = COM;
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end
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