Fixed description of the output of comparison operators.
They return logical arrays, not arrays of 0 and 1.time-shift
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@ -85,44 +85,42 @@ below. Basic operations can be performed on dates:
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Tests if two ``dates`` objects are equal. ``+1950Q1==1950Q2``
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returns ``true``, ``1950Q1==1950Q2`` returns ``false``. If the compared
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objects have both ``n>1`` elements, the ``eq`` operator returns a
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column vector, ``n`` by ``1``, of zeros and ones.
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column vector, ``n`` by ``1``, of logicals.
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**ne operator (not equal, ~=)**
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Tests if two ``dates`` objects are not equal. ``+1950Q1~=``
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returns ``false`` while ``1950Q1~=1950Q2`` returns ``true``. If the
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compared objects both have ``n>1`` elements, the ``ne`` operator
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returns an ``n`` by ``1`` column vector of zeros and ones.
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returns an ``n`` by ``1`` column vector of logicals.
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**lt operator (less than, <)**
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Tests if a ``dates`` object preceeds another ``dates`` object. For
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instance, ``1950Q1<1950Q3`` returns ``true``. If the compared objects
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have both ``n>1`` elements, the ``lt`` operator returns a column
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vector, ``n`` by ``1``, of zeros and ones.
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vector, ``n`` by ``1``, of logicals.
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**gt operator (greater than, >)**
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Tests if a ``dates`` object follows another ``dates`` object. For
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instance, ``1950Q1>1950Q3`` returns ``false``. If the compared objects
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have both ``n>1`` elements, the ``gt`` operator returns a column
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vector, ``n`` by ``1``, of zeros and ones.
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vector, ``n`` by ``1``, of logicals.
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**le operator (less or equal, <=)**
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Tests if a ``dates`` object preceeds another ``dates`` object or
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is equal to this object. For instance, ``1950Q1<=1950Q3`` returns
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``true``. If the compared objects have both ``n>1`` elements, the
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``le`` operator returns a column vector, ``n`` by ``1``, of zeros
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and ones.
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``le`` operator returns a column vector, ``n`` by ``1``, of logicals.
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**ge operator (greater or equal, >=)**
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Tests if a ``dates`` object follows another ``dates`` object or is
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equal to this object. For instance, ``1950Q1>=1950Q3`` returns
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``false``. If the compared objects have both ``n>1`` elements, the
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``ge`` operator returns a column vector, ``n`` by ``1``, of zeros
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and ones.
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``ge`` operator returns a column vector, ``n`` by ``1``, of logicals.
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One can select an element, or some elements, in a ``dates`` object as
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he would extract some elements from a vector in MATLAB/Octave. Let ``a
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