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Functions and commands 413
residue Returns the residue of an expression at a value.
residue(Expr, Var, Value)
Example:
residue(1/z,z,0) returns 1
restart Purges all the variables.
restart(NULL)
resultant Returns the resultant (i.e. the determinant of the Sylvester
matrix) of two polynomials.
resultant(Poly1, Poly2, Var)
Example:
resultant(x^3+x+1, x^2-x-2,x) returns -11
revlist Reverses the order of the elements in a list or vector.
revlist(List) or revlist(Vector)
Example:
revlist([1,2,3]) returns [3,2,1]
romberg Uses Romberg’s method to return the approximate value of a
definite integral.
romberg(Expr, Var, Val1, Val2)
Example:
romberg(exp(x^2),x,0,1) gives 1.46265174591
row Given a matrix and an integer n, returns the row n of the
matrix. Given a matrix and an interval, returns a vector
containing the rows of the matrix indicated by the interval.
row(Matrix, Integer) or row(Matrix, Interval)
Example:
row returns [4,5,6]
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