getfirstdimsize.m

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function sizeVec=getfirstdimsize(value,nDims)
if ~isnumeric(nDims)||numel(nDims)~=1||...
        fix(nDims)~=nDims||nDims<0
    %
    mxberry.core.throwerror('wrongInput',...
        'nDims is expected to be a scalar positive integer value');
end
%
if nDims==1
    sizeVec=size(value,1);
else
    sizeCVec=cell(1,max(ndims(value),nDims));
    [sizeCVec{:}]=size(value);
    sizeVec=[sizeCVec{1:nDims}];
end