extract_attr_deriv converts attributes(hessian/gradient) of deriv() into a matrix of character strings.
extract_attr_deriv converts attributes(hessian/gradient) of deriv() into a
matrix of character strings.
extract_attr_deriv(ex, attribute)
ex |
Expression of derivative. Results of |
attribute |
"grad" for gradient or "hessian" for the Hessian matrix. |
Returns a matrix of character strings.
eq <- parse(text="2*(log(sin(x)/log(x)))+x^4*log(x)+cos(y+x)")
tt <- deriv(eq, c("x", "y"), hessian=TRUE)
g <- tt%>%extract_attr_deriv(., attribute = "grad")
h <- tt%>%extract_attr_deriv(., attribute = "hessian")Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.