GSM中GMSK调制信号的产生，该函数用来计算任意函数的一阶偏导数(数值方法),包括主成分分析、因子分析、贝叶斯分析。- GSM is GMSK modulation signal generation, This function is used to calculate the arbitrary function of the first order partial derivative (numerical methods), Including principal component analysis, factor analysis, Bayesian analysis.