MATLAB Programming
MATLAB Programming MATLAB Programming
1 Data Structures For example, consider a 5-by-4-by-3-by-2 array C. 1-60
Multidimensional Arrays Again, a single subscript indexes directly into this column. For example, C(4) produces the result ans = 0 If you specify two subscripts (i,j) indicating row-column indices, MATLAB calculates the offset as described above. Two subscripts always access the first page of a multidimensional array, provided they are within the range of the original array dimensions. If more than one subscript is present, all subscripts must conform to the original array dimensions. For example, C(6,2) is invalid because all pages of C have only five rows. If you specify more than two subscripts, MATLAB extends its indexing scheme accordingly. For example, consider four subscripts (i,j,k,l) into a four-dimensional array with size [d1 d2 d3 d4]. MATLAB calculates the offset into the storage column by (l-1)(d3)(d2)(d1)+(k-1)(d2)(d1)+(j-1)(d1)+i For example, if you index the array C using subscripts (3, 4, 2, 1), MATLAB returns the value 5 (index 38 in the storage column). In general, the offset formula for an array with dimensions [d 1 d 2 d 3 ... d n ] using any subscripts (s 1 s 2 s 3 ... s n ) is (s n -1)(d n-1 )(d n-2 )...(d 1 )+(s n-1 -1)(d n-2 )...(d 1 )+...+(s 2 -1)(d 1 )+s 1 Because of this scheme, you can index an array using any number of subscripts. You can append any number of 1s to the subscript list because these terms become zero. For example, C(3,2,1,1,1,1,1,1) is equivalent to C(3,2) 1-61
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1 Data Structures<br />
For example, consider a 5-by-4-by-3-by-2 array C.<br />
1-60
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