Matlab ilaplace command questions

[bassplayer142]

I am using the ilaplace command from MATLAB and it keeps spitting out the dirac delta function. I typed the exact command in the MATLAB help section and it still gives me this. for example I type in this...

ilaplace(1/(s-1))

and I get this...

1 - dirac(t)

below is a copy of MATLAB help file that has this exact command with the result I'm after.

Examples:
syms s t w x y
ilaplace(1/(s-1)) returns exp(t)

Any help would be great. I'm thinking it is some format command or something beforehand.

 

[matematikawan]

I think you must have mistakenly typed it as >> ilaplace(1/s-1)
Thats why you got 1 - dirac(t).

 

[bassplayer142]

I think you must have mistakenly typed it as >> ilaplace(1/s-1)
Thats why you got 1 - dirac(t).

I'm not quite sure what you mean? Sorry for the much delayed response.

EDIT: AHH I see what your saying now with the parentases!