how can I change lowpass filter form?

Question

Kim Dogyun 2013-7-25

Hi~ I need to generate band-limited Gaussian white noise signal with frequency between 0 and 13Hz and an amplitude ±20.

The sampling frequency is 200Hz.

if sampling frequency is changed, how can I write the number in this form?

>>lowpass('Fp,Fst,Ap,Ast',x,x,x,x,Fs);

Please help me...

Answer 1

David Sanchez 2013-7-25

The string entries are defined as follows:

Ap — amount of ripple allowed in the pass band in decibels (the default units). Also called Apass.

Ast — attenuation in the stop band in decibels (the default units). Also called Astop.

Fc — cutoff frequency for the point 6 dB point below the passband value. Specified in normalized frequency units.

Fp — frequency at the start of the pass band. Specified in normalized frequency units. Also called Fpass.

Fst — frequency at the end of the stop band. Specified in normalized frequency units. Also called Fstop.

Kim Dogyun 2013-7-26

编辑：Kim Dogyun 2013-7-26

sorry, modify my question..could you check this?