Development Core Team. Assignments with the = Operator. [2018-09-11]. (原始内容存档于2019-01-08). most used assignment operator in R is <- R Development Core Team. Writing
其中,X[k]为x[n]的DFT变换,变换前后样本长度皆为N。 ∫ − ∞ ∞ | x ( t ) | 2 d t {\displaystyle \int _{-\infty }^{\infty }|x(t)|^{2}dt} = ∫ − ∞ ∞ x ( t ) x ∗ ( t ) d t {\displaystyle