Electron density calculator for 2D-hexagonal lattices

This Javascript calculates the 2D electron density distribution rho(r) of a hexagonal lattice from scattering data. Enter the value of the 2D-lattice spacing (d). Enter the peak intensities I(q) and the sign of the scattering amplitude F(q) of the first order reflection (+ or -). Select the type of the corrections already applied to the input data: 'none' means no corrections, LC means Lorentz correction (multiplied by q*q) and MC means multiplicity correction (divided by the multiplicities) have already been applied. F(q) have to be entered both LC and MC corrected. For 2*Nr points rho(r) from -rmax = -rx = -ry to rmax = rx = ry will be calculated. If the calculation takes too long (on a slow computer) decrease Nr. For three reflections the electron density with the 4 sign combinations will be calculated: x/+/+, x/+/-, x/-/+, x/-/-, where x is the sign of the first order reflection. The values are listed/plotted in rho(r) vs rx, ry for all 4 combinations in arbitrary units and can be copied and pasted from the window into any text-file for further processing and graphical displaying.