72 lines
2.4 KiB
Matlab
72 lines
2.4 KiB
Matlab
function A = extract(B,varargin)
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% Extract some variables from a database.
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A = dynSeries();
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% Get the names of the variables to be extracted from dynSeries object B.
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VariableName_ = {};
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for i=1:nargin-1
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VariableName = varargin{i};
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idArobase = strfind(VariableName,'@');
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if length(idArobase)==2
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first_block_id = 0;
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last_block_id = 0;
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if idArobase(1)>1
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first_block_id = idArobase(1)-1;
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end
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if idArobase(2)<length(VariableName)
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last_block_id = length(VariableName)-idArobase(2)-1;
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end
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VariableName(idArobase(1)) = '[';
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VariableName(idArobase(2)) = ']';
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idVariables = find(isnotempty_cell(regexp(B.name,VariableName,'match')));
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if isempty(idVariables)
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error(['dynSeries::extract: Can''t find any variable matching ' VariableName ' pattern!'])
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end
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idVariables_ = [];
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for j = 1:length(idVariables)
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first_block_flag = 0;
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if (first_block_id && strcmp(B.name{idVariables(j)}(1:first_block_id),VariableName(1:first_block_id))) || ~first_block_id
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first_block_flag = 1;
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end
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last_block_flag = 0;
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if (last_block_id && strcmp(B.name{idVariables(j)}(end-last_block_id:end),VariableName(end-last_block_id:end))) || ~last_block_id
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last_block_flag = 1;
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end
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if first_block_flag && last_block_flag
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idVariables_ = [idVariables_; idVariables(j)];
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end
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end
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VariableName = B.name(idVariables_);
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end
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VariableName_ = vertcat(VariableName_,VariableName);
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end
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% Get indices of the selected variables
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idVariableName = NaN(length(VariableName_),1);
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for i = 1:length(idVariableName)
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idx = strmatch(VariableName_{i},B.name,'exact');
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if isempty(idx)
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error(['dynSeries::extract: Variable ' VariableName_{i} ' is not a member of ' inputname(1) '!'])
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end
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idVariableName(i) = idx;
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end
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A.data = B.data(:,idVariableName);
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A.init = B.init;
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A.freq = B.freq;
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A.nobs = B.nobs;
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A.vobs = length(idVariableName);
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A.name = B.name(idVariableName);
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function b = isnotempty_cell(CellArray)
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CellArrayDimension = size(CellArray);
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b = NaN(CellArrayDimension);
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for i=1:CellArrayDimension(1)
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for j = 1:CellArrayDimension(2)
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b(i,j) = ~isempty(CellArray{i,j});
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end
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end |