I want to plot a fourth order low pass Butterworth for any given cut off freq. But I'm lacking the correct transfer function. I saw some polynomial transfer functions in s domain. But their cutoff is 1rad/s. Here is a table I found for wc=1rad/s:
Is there a quick way to modify for example the 4th order filter transfer function above for a different wc other than 1rad/s? Is there a quick way to obtain or is there a lookup table designated for filter transfer functions?