MathAction #164 min row and min col in IndexedOneDimensionalArray's IndexedTwoDimensionalArray

Submitted by : (unknown) at: 2007年11月17日T22:00:40-08:00 (18 years ago)
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In array2.spad

\section{domain IARRAY2 IndexedTwoDimensionalArray}
<>=
)abbrev domain IARRAY2 IndexedTwoDimensionalArray
IndexedTwoDimensionalArray(R,mnRow,mnCol):Exports == Implementation where
 ++ An IndexedTwoDimensionalArray is a 2-dimensional array where
 ++ the minimal row and column indices are parameters of the type.
 ++ Rows and columns are returned as IndexedOneDimensionalArray's with
 ++ minimal indices matching those of the IndexedTwoDimensionalArray.
 ++ The index of the first row may be obtained by calling the
 ++ function minRowIndex. The index of the first column may
 ++ be obtained by calling the function minColIndex. The index of
 ++ the first element of a Row is the same as the index of the
 ++ first column in an array and vice versa.
 R : Type
 mnRow, mnCol : Integer
 Row ==> IndexedOneDimensionalArray(R,mnCol)
 Col ==> IndexedOneDimensionalArray(R,mnRow)
 ^^^^^^

Exports ==> TwoDimensionalArrayCategory(R,Row,Col)

Implementation ==> InnerIndexedTwoDimensionalArray(R,mnRow,mnCol,Row,Col)

In IndexedOneDimensionalArray?(*)
Col => min index of row (mnRow)
Row => min index of column (mnCol)
Is it a bug ?

... --unknown, 2005年6月07日 13:45:33 -0500 reply
No, this is correct. A one-dimensional row vector has columns, and the number of columns need to be specified as mnCol. Similarly, a one-dimensional column vector has rows, and the number of rows need to be specified as mnRow.

Exact --unknown, 2005年6月07日 14:46:28 -0500 reply
mnCol is minimal column index used, for example, in row creation after extraction.

property change --unknown, 2005年6月07日 14:46:50 -0500 reply
Status: open => closed




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