matlab中变量计算中加点,为什么?答:加点的意思就是对应元素做对应的运算的意思。例如;a=[1,2,3,4,5];b=[1,2,3,4,5];那么,a.*b=[1*1,2*2,3*3,4*4,5*5]=[1,4,9,16,25]用matlab给你验证一下:>> a=1:5;>> b=a;>> a.*b ans = 1 4 9 16 25 >> 当然,还有./ .* .^2 ...
matlab定义变量矩阵答:参考代码:N = 5;X = sym(zeros(N));for i=1:N for j=1:N cmd = sprintf('sym(''X%i%i'')',i,j); X(i,j) = eval(cmd); endendX 运行结果:X = [ X11, X12, X13, X14, X15][ X21, X22, X23, X24, X25][ X31, X32, X33, X34, X35][ X41, ...