MATLAB: Plot when a value of zero makes issue

plotting

my code below is supposed to plot different graph with different value of t:
many thanks
c=2;
nu = 1*1e-6;
    r = linspace(0,100);
    t=[1/2 1 2 6 10 20 50 ];
for count=1:7
    v = c * (1-exp(-r.^2./(4*nu*t(count))))./r;
    plot(r,v,'o-')
    legend([' t= ',num2str(t(count))])
    legend show
    ylabel('v(m/sec)')
    xlabel('r(m)')
    grid on
    hold on
end

Best Answer

If you change your nu to something more reasonable, it provides the graphs dynamics you are looking for.
nu=10;
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