Difference between revisions of "Documentation/How Tos/Calc: MUNIT function"
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=== Syntax: === | === Syntax: === | ||
<tt>'''MUNIT(size)'''</tt> | <tt>'''MUNIT(size)'''</tt> | ||
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: returns the unit matrix, also known as the identity matrix '''I''', of size <tt>'''size'''</tt> (an integer greater than zero). | : returns the unit matrix, also known as the identity matrix '''I''', of size <tt>'''size'''</tt> (an integer greater than zero). | ||
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: <tt>'''MUNIT'''</tt> returns an array, and must be entered as an array formula (for example by using '''Cntrl-Shift-Enter''' rather than just '''Enter'''). | : <tt>'''MUNIT'''</tt> returns an array, and must be entered as an array formula (for example by using '''Cntrl-Shift-Enter''' rather than just '''Enter'''). | ||
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=== Example: === | === Example: === | ||
Revision as of 08:19, 14 March 2008
MUNIT
Returns a unit (identity) matrix of a given size.
Syntax:
MUNIT(size)
- returns the unit matrix, also known as the identity matrix I, of size size (an integer greater than zero).
- The identity matrix has ones on the leading diagonal, and zeroes elsewhere.
- MUNIT returns an array, and must be entered as an array formula (for example by using Cntrl-Shift-Enter rather than just Enter).
Example:
=MUNIT(2)
- when entered as an array formula in cell B3, returns {1;0|0;1}, so that B3, C3, B4, C4 show 1, 0, 0, 1 respectively.
