Why does this function handle not work?

I don't understand why this code doesn't work. Does someone see it?

fun = (@t) A0.*(k./(kaccent+k)).*(1-((exp(1)).^(-((k+kaccent).*t))))

Answer 1

[David Hill]

fun = @(t) A0.*(k./(kaccent+k)).*(1-((exp(1)).^(-((k+kaccent).*t))));