function c = scalar2color(scalar, precision)%precision表示有多少间隙,
% convert scalar to color vector
%
%
% Copyright (c) 2017 seamanj@NCCA
if size(scalar,2)>size(scalar,1)
scalar = scalar';
end
c = zeros(size(scalar,1), 3);
color = jet(precision+1);%共有precision+1个点
index = scalar * precision + 1;
IDX1 = find(index == precision+1);
IDX2 = find(index ~= precision+1);
if ~isempty(IDX1)
c(IDX1,:) = repmat(color(precision + 1,:),size(IDX1,1),1);
end
if ~isempty(IDX2)
t = index(IDX2) - floor(index(IDX2));
c(IDX2,:) = color(floor(index(IDX2)),:) .* repmat((1-t),1,3) + repmat(t,1,3).*color(floor(index(IDX2))+1,:) ;
end
end
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