at:tutorial:basic
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at:tutorial:basic [2020/02/09 19:28] – elisag | at:tutorial:basic [2020/02/09 21:35] – elisag | ||
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- | ==== Multidimensional tables ==== | ||
- | As mentioned before, there is no special constructor for definition of multidimensional tables, a table entry can contain another table. In what follows we have a closer look to manipulations with multidimensional tables. | ||
- | A multidimensional table can be extensionally defined as follows: | ||
- | < | ||
+ | |||
+ | |||
+ | |||
+ | ==== Multidimensional tables ==== | ||
+ | |||
+ | As mentioned before, there is no special constructor for definition of multidimensional tables, a table entry can contain another table. In what follows we have a closer look to manipulations with multidimensional tables. | ||
+ | |||
+ | < | ||
def a := [[1,0,0], [0,1,0], [0,0,1]]; | def a := [[1,0,0], [0,1,0], [0,0,1]]; | ||
>> | >> | ||
Line 102: | Line 106: | ||
>a[1] | >a[1] | ||
>>[1, 0, 0] | >>[1, 0, 0] | ||
+ | > | ||
+ | >>3 | ||
+ | >a | ||
+ | >> | ||
</ | </ | ||
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def aux[3] {0}; | def aux[3] {0}; | ||
def b[3] { i := i + 1; aux := [0,0,0]; aux[i] :=1; aux}; | def b[3] { i := i + 1; aux := [0,0,0]; aux[i] :=1; aux}; | ||
+ | >> | ||
</ | </ | ||
+ | |||
+ | Finally, we can define a helper function to create matrices as follows: | ||
+ | |||
+ | < | ||
+ | def makeMatrix(n, | ||
+ | def [i,j] := [0,0]; | ||
+ | def makeCol(i, | ||
+ | def col[m] { j := j + 1; init(n,m) } | ||
+ | }; | ||
+ | def matrix[n] { i := i + 1; makeCol(i, | ||
+ | }; | ||
+ | def c := makeMatrix(3); | ||
+ | >> | ||
+ | >c[1] := [1,2,3] | ||
+ | >>[1, 2, 3] | ||
+ | >c | ||
+ | >> | ||
+ | </ | ||
+ | |||
===== Functions ===== | ===== Functions ===== |
at/tutorial/basic.txt · Last modified: 2020/02/09 22:05 by elisag