What am I doing wrong?

function v = vpiece(t) if t 26 v = 2156*exp(-0.1*(t-26)); else v = 0; end end

t = -5:100:70; v = [];

for i=1:length(t) v(i) = velocity(t(i)); end

plot(t, v) xlabel('Time(s)') ylabel('Veloctiy(m/s)') title('Rocket Velocity Profile')

Probleml: Piecewise functions are sometimes useful when the relationship between a dependent and an independent variable cannot be adequately represented by a single equation. For example, the velocity of a rocket might be described by 1012 -0.50 0