Error using Butterworth filter

When I use this code, I get the following error:Error using plot Data cannot have more than 2 dimensions. Maybe it's because I extract data from a 3D matrix?

[B,A] = butter(4,0.6); %standaard een low-pass filter. 4 = order. 0.6 = cutoff.
Gefilterde_data = filtfilt(B, A, data_stair_rise(welke_pp,i_testen).VideoSignals);
plot(Gefilterde_data);

Answer 1

[Image Analyst]

There is a plot3() function you can use instead. Try that.

[Sam]

Already tried that. But than he gives an error 'not enough input arguments'...

[Image Analyst]

Then read the help and supply all the input arguments it wants.