4.6 GEMSQRAW: I2T

The program I2T is intended to Fourier transform diffraction data to obtain the pair distribution function:

The input workspace should contain the distinct scattering *i(Q)*. In
practice the input should be on a *Q*-axis and should oscillate about a
value of zero - subtract a suitable constant from your data to achieve
this.

If a workspace called **data** contains *i(Q)*
then its Fourier transform may be calculated by typing this:

**ft=i2t(data)**

This will put *T(r)* (or *D(r)=T(r)-T*^{0}*(r)* )
into the workspace called **ft**.

It is not necessary for the input workspace to be put on a constant delta-*Q*
scale. However, should you wish to do this then use a command like the following
example...

**data=rebin:linear(data,3.0,0.05,30.0)**

Last updated on *18 Sep 2002* by Alex Hannon (a.c.hannon@rl.ac.uk)