www.gusucode.com > symbolic 源码程序 matlab案例代码 > symbolic/LambertWPlotOfTheTwoMainBranchesExample.m

    %% Plot Two Main Branches
% Plot the two main branches, $W_0(x)$ and $W_{-1}(x)$, of the Lambert W
% function.
%%
% Plot the principal branch $W_0(x)$. Add the branch $W_{-1}(x)$. Adjust
% the axes limits and add the title.
syms x
fplot(lambertw(x))
hold on
fplot(lambertw(-1, x))
axis([-0.5, 4, -4, 2])
title('Lambert W function, two main branches')