Your desired solution is only valid if x is real, thus you need to tell MATLAB that. assume(x, 'real') simplify(expr). ... <看更多>

If I submit the command Xpow=abs(X).^2; vs. Xpow=X.*conj(X); , I get different results. The latter is much faster to compute ... ... <看更多>

matlab -abs函数求绝对值求模. Jun 28, 2018. 简介求绝对值或求复数的模. 语法. Y = abs(x). 说明 x为实数:abs(x)返回x的绝对值x为复数:abs(x)返回x的模，等同于|a+bi| ... ... <看更多>