matlab如何用牛顿迭代发解方程?请举个例子.

% f(x) = x*sin(1/x)-0.2*exp(-x) 求此方程f(x) = 0的解x = 0.55;% 初始值eps = 1; tol = 10^(-14); total = 100; k = 0; format long;while ((eps > tol) & (k