AIM To evaluate the similarity between two chromatographic fingerprints automatical ly with computer. METHODS Chromatogram can be treated as vector of hyperspace, and the similarity betwee n them can be counted according to vectorial angle formula. This process was per formed with software written in Visual Basic 6 0. The two main functions of thi s software are automatic peak tracking in two fingerprints under the same analyt ic condition and computing the similarity automatically. RESULTS The HPLC fin...