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function s = CompareVersions(v,w)
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%s = CompareVersions(v,w);
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%compares version v to w
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% s = 'before','equal','after'
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% 'before <=> version v is before version w
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%
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% v and w must be vectors of the same length
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%
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% example: v = [1,0,0,0]; w = [1,4,0,0]; s = 'before'
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%Author: Frank van Diggelen
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%Open Source code for processing Android GNSS Measurements
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if length(v)~=length(w)
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error('The two inputs must be scalars or vectors of the same length')
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end
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d = v(:)-w(:);
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%find first d that differs from zero
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i = find(d~=0);
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if isempty(i)
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s = 'equal';
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elseif d(i(1)) < 0 %the first field that differs is the most significant
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s = 'before';
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else
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s = 'after';
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end
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end %end function CompareVersions
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% Copyright 2016 Google Inc.
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%
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% Licensed under the Apache License, Version 2.0 (the "License");
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% you may not use this file except in compliance with the License.
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% You may obtain a copy of the License at
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%
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% http://www.apache.org/licenses/LICENSE-2.0
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%
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% Unless required by applicable law or agreed to in writing, software
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% distributed under the License is distributed on an "AS IS" BASIS,
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% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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% See the License for the specific language governing permissions and
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% limitations under the License.
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