02 Основы работы в MATLAB
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Функции для работы с массивами в Matlab
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length(V) |
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prod(V) |
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cumprod(V) |
, V, |
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v1, v1·v2, v1·v2·v3,…, v1·v2·v3·…·vn |
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sum(V) |
V |
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cumsum(V) |
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v1, v1+v2, v1+v2+v3,…, v1+v2+v3+…+vn |
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diff(V) |
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V, , ! " |
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V; |
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v2-v1,v3-v2, …, vn-vn-1 |
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min(V), max(V) |
$% " " V |
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mean(V) |
V |
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dot(V1,V2) |
V1 V2 |
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cross(V1,V2) |
V1 V2 |
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sort(V) |
V |
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eye(n [ , m ] ) |
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ones (n [, m, p, …]) |
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zeros (n, [, m, p, …]) |
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diag (V [,k ]) |
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V k- |
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rand([n, m, p, …]) |
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randn([n, m, p, …]) |
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% " |
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linspace(a, b, [, n]) |
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100 n , |
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% a b |
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logspace(a, b, [, n]) |
50 n , % |
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# ! 10 10b |
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repmat(A, n, [, m]) |
, n n n m |
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A |
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reshape(A, m, n) |
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" m·n, ' |
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" ! ! |
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cat(n, A, B, [, C …]) |
!( ' % |
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horzcat(A, B), |
) " " !( ' |
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vertcat (A,B) |
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tril(A [, k]) |
' " , |
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k- |
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triu (A [, k]) |
' % " , |
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k- |
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size(A) |
! ' |
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cumprod(A) |
, , ! , |
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! ! ', k |
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sum(A [, k]) |
- -! k, |
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! ' |
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cumsum(A, [k]) |
, , ! , |
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! ! ', k |
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diff[A] |
* ' n·m |
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n-1·m, ! " |
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% ' |
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det(A) |
" ' |
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trace(A) |
', ", |
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inv(A) |
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, ! ' |
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eig(A) |
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! % ', |
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[M,D]=eig(A) +, ! |
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– ! ', " D, |
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! ' |
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magic(n [, k]) |
n |
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linsolve(A,b) |
, # % A·x = b |
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