Taking the FFT of a 2D array

[JBadon]

I am using a Kiethley board to control a motor that is constantly spinning a frame.  I have 2 accelerometers that are monitoring the vibrations of the motor, but in order to see where these vibrations get more intense I must take the FFT of the signal.  This signal is a 2D array.  How do I take the FFT of a  2D array?  Any and all help would be appreciated.  I have been trying, but can't seem to figure it out.   

[GerdW]

Hello JBadon,

your 2d data probably consist of 2 colums of data, one column for each accelerometer. So just use index array (or array subset) to get the data for only one accelerometer and do your FFT on this data!