Ever since I found the Excel newsgroups,
my knowledge of array formulas has increased in leaps and
bounds. These pages reflect my own take on the subject.
Basic Building Blocks
Create a list (an
array) of the numbers 1,2,...,n
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Use
=ROW(INDIRECT("1:n")),
or
=ROW(OFFSET($A$1, 0, 0, n, 1)) |
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Sort a range of
numbers in descending order
Alternative 1: |
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Use
=LARGE(aRng,ROW(INDIRECT("1:"&ROWS(aRng))))
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Explanation: |
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Alternative 2:
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Use
=LARGE(aRng,ROW(aRng)-ROW(OFFSET(aRng,0,0,1,1))+1)
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Formulas to
| Create a matrix with ones
on the cross-diagonal (cells in a NxN matrix where
the row number + the column number equals
n+1). Used to reverse the row order or the
column order of any MxN matrix. |
Harlan
Grove's post on the method |
Reverse the row-order or
column-order of elements in a matrix
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