如何使用matlab创建一个asterik矩形

Question

我是matlab的初学者.任何人都可以告诉如何在图像中创建一个asterik矩形:

Answer 1

这是一种没有循环的方法:

m = 5;     %// number of rows
n = 12;    %// number of cols
c = ' ';   %// inner character
C = '*';   %// outer character
x = repmat(c, m, n);   %// create m x n array of c
x([1 end], :) = C;     %// replace top and bottom with C
x(:, [1 end]) = C;     %// replace left and right with C

这给了

>> disp(x)
************
*          *
*          *
*          *
************