Hi,
 
I receive the digital data from visa.
 
I want to filter the signal in real time.
 
The sampling frequency of signal is 200Hz. 
 
But, the point by point butter worth filter don't filter the signal.
 
And I don't know how to use butter worth filter from visa. (actually can't convert element to 1D array like circular buffer)
 
How can i use filter?