mfbox_pre_datavalue_run.m

来自「toolbox for spm 5 for data, model free a」· M 代码 · 共 115 行

function [X,mask,grid,timeline,params,private]=mfbox_pre_datavalue_run(X,mask,grid,timeline,params,runflag,private)
% select voxels based on value
%
% Usage:
%  [X,mask,grid,timeline,params,private]=mfbox_pre_datavalue_run(X,mask,grid,timeline,params,runflag,private)
%
%  X        - (NxT) data
%             or struct for mfbox_databackend('getdata',X,i),[],1);
%  mask     - data mask (XxYxZ) with sum(mask(:))==N
%  grid     - 3d positions (3xN) of the data values
%  timeline - timeline (1xT)
%  params   - struct with
%             priority - evaluation priority
%             valmin   - min value
%             valmax   - max value
%  runflag  - -1 get default parameter
%              0 interactive ask parameters
%              1 interactive ask parameters and run
%              2 run
%  private  - private data to enable plot updates while selecting (see also mfbox_databackend)
%
% Copyright by Peter Gruber and Fabian J. Theis
% Signal Processing & Information Theory group
% Institute of Biophysics, University of Regensburg, Germany
% Homepage: http://research.fabian.theis.name
%           http://www-aglang.uni-regensburg.de
%
% This file is free software, subject to the 
% GNU GENERAL PUBLIC LICENSE, see gpl.txt

error(nargchk(1,7,nargin));
error(nargchk(1,6,nargout));

if (isstruct(X)), s = [X.dim,X.timesteps];
else s = size(X);
end
dim = s(1:(end-1));
if (length(dim)<2), dim = [1,dim]; end
n = s(end);

if (nargin<2), mask = true(dim); end
dim = size(mask);
if (length(dim)==length(s)), n = 1; end

if (nargin<3), grid = mfbox_mkgrid(dim)'; end
if (nargin<4), timeline = 0:(n-1); end
if (nargin<5), params = []; end
if (nargin<6), runflag = 1; end
if (nargin<7), private = []; end

if (isstruct(X))
    oX = X;
    X = zeros([prod(dim),n],'single');
    minX = ones(dim)*Inf;
    maxX = -ones(dim)*Inf;
    for i=1:n
        v = reshape(mfbox_databackend('getdata',oX,i),dim);
        miv = minX>v; mav = maxX<v;
        minX(miv) = v(miv); maxX(mav) = v(mav);
        X(:,i) = v(mask);
    end
else
    minX = reshape(min(reshape(X,[],n),[],2),dim);
    maxX = reshape(max(reshape(X,[],n),[],2),dim);
end

ms = size(mask);
if (any(ms==0)), ms = 0; end
ng = mat2cell(mfbox_mkgrid(ms),prod(ms),ones(1,length(ms)));
g = cell(1,size(grid,1));
for i=1:size(grid,1), g{i} = reshape(grid(i,:),dim); end
if (any(cellfun(@(x) any(g{x}(:)~=ng{x}(:)),mat2cell(1:size(grid,1),1,ones(1,size(grid,1))))))
    if (~isempty(minX))
        minX = reshape(interpn(g{:},minX,ng{:}),dim);
    end
    if (~isempty(maxX))
        maxX = reshape(interpn(g{:},maxX,ng{:}),dim);
    end
end
minval = floor(min(minX(:)));
maxval = ceil(max(maxX(:)));
miv = max([-1/eps,minval]);
mav = min([1/eps,maxval]);

params = mfbox_checkparam(params,'pre','datavalue', ...
    struct('valmin',miv-1,'valmax',mav+1,'priority',1));

if (abs(runflag-0.5)<1)
    if (exist('OCTAVE_HOME')~=5)% matlab
        [params,private] = mfbox_pre_datavalueg(X,mask,grid,timeline,params,runflag,private);
    elseif (exist('OCTAVE_HOME')==5) %octave
        [params,runflag] = mfbox_getparam(params,runflag,'mfbox_pre_datavalueg.py');
    end
end

if (runflag>0 && isstruct(params))
    v = params.valmin; w = params.valmax;
    if (v<w), mask = mask&(minX>v)&(maxX<w);
    else mask = mask&((minX<=w)|(maxX>=v));
    end
    if (~isstruct(X))
        sgr = size(grid);
        sm = size(mask);
        g = mat2cell(min(repmat(sm',1,sgr(2)),max(ones(sgr), ...
            round(grid))),ones(1,sgr(1)),sgr(2));
        nmask = mask(sub2ind(sm,g{:}));
        grid = grid(:,nmask);
        X = reshape(X,[],n);
        X = X(nmask,:);
    end
end

return