cI()

function out=cI(in)

Input:

• in: $d=3$ dimensional data stored as an $\prod S_k\,\times\,1$ vector

Global variables:

• gbl_S: dimensions of $d=3$ dimensional data set

Output:

• out: cI operator applied to in

Write a file ``cI.m'' containing a function of the above specification. To carry out the forward transform using FFTW you will need to copy the file /home/muchomas/P480/Octave/fftw3.oct on the physics educational cluster into your octave directory. To use this function, note that

fftw3(dat,Nx,Ny,Nz,1);

returns the discrete Fourier sum with sign $+i$ in the exponential for data of dimension Nx$\times$Ny$\times$Nz. (For more information, enter ``help fftw3'' at the octave prompt once you've copied fftw3.oct into your octave directory.)
NOTE: The remote login machine remote.physics.cornell.edu runs an older version of octave that can't read fftw3.oct. If you work remotely, you will have to first ssh into one of the workstations ws01, ws02, .... If you log directly into a workstation, this is not an issue.