library(copula)
C_XY <- expression(pCopula(c(x,y),normalCopula(0.5)))
Dy <- deriv(C_XY,"y",function.arg = TRUE)
但是遗憾的报错:
Error in deriv.default(C_XY, "y", function.arg = TRUE) :
Function 'pCopula' is not in the derivatives table
进一步的,如果想求解一个表达式的微分,但是里面牵涉到其他第三方包的函数,有没有处理方法?