how can i write function to display matrix?

1 次查看（过去 30 天）
hassan elkholy
hassan elkholy 2020-12-23
回答： Masoud Dorvash 2021-1-18
how can i write function to display a zero matrix and its diagonal calculated by function
f(n) = f(n-1)+2f(n-2)+3
it has only one input n
  1 个评论
Walter Roberson
Walter Roberson 2020-12-23
If you start with an all-zero matrix then every element of the matrix will be the same for any given n, so it seems odd to talk about the diagonal.
You would need a matrix multiplication step to perturb the elements so that the diagonals were not all the same.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Masoud Dorvash
Masoud Dorvash 2021-1-18
Hello,
You just need to use
D = diag(v);
This command will create a matrix with the elements of v on the main diagonal.
Try to first create your v vector (here in your example is f(n)) then put it there.
v = [1 6 2 14 1 8 46];
diag(v)
ans =
1 0 0 0 0 0 0
0 6 0 0 0 0 0
0 0 2 0 0 0 0
0 0 0 14 0 0 0
0 0 0 0 1 0 0
0 0 0 0 0 8 0
0 0 0 0 0 0 46

类别

在 Help Center 和 File Exchange 中查找有关 Operating on Diagonal Matrices 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by