I want to make step responce using lsim command ( I know that there is a command names step but I need to do it using lsim command) . so my step is zero while 0<t<10 and is equel to 22 while 10<t<20 . when I use the command lsim . the plot is right but for some reason the output of the plot is giving me extra plot and I dont undestand why does it happen . is it a bug ? or am I using the command lsim wrong ?
sys1 = tf(1,[ 1 0]);