Contact: Jim Stewart, Department of Chemistry,

University of Maryland, College Park, MD 20742, USA

FOmerges two identically dimensioned maps simply by taking a point by point sum. The contribution of each map may be weighted, and thresholds may set to avoid low or negative densities.

File Assignments

Reads first electron density map from the map file

Reads second electron density map from the mpp file

Write the sum of the two maps to the mpn file