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MuPAD heaviside in R2015a
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Hi,
I'm trying to solve the following ode in MuPAD:
ode( {y''(t)+6*y'(t)+5*y(t)-heaviside(t-1)=0, y(0)=0, y'(0)=1 }, y(t) )
In 2015a, I get the following result:
{exp(-t)/4 - exp(-5*t)/4 - (exp(-t)*(sign(t - 1)/2 + 1/2)*(exp(1) - exp(t)))/4 - (exp(-5*t)*(sign(t - 1)/2 + 1/2)*(exp(5*t) - exp(5)))/20}
It's a little hard to read, but I'm getting sign() in place of heaviside(). R2014a does not have this problem. I get heaviside() as expected.
Did something change between R2014a and R2015a with regards to solving ODEs and heavside?
Thanks!
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