Method and apparatus for displaying gene expression patterns

An apparatus for analyzing gene expression patterns, which acquires, from a database, expression pattern data of multiple genes whose expressions change according to experiment cases, where a first axis represents the genes and a second axis represents gene expression status of the experiment cases, the apparatus comprising:

• an inputting means for designating a clustering-applied region along the second axis and a segment shorter than a width of the clustering-applied region along the second axis obtained from the database, and an arithmetic unit for incrementally clustering the expression pattern data by the segment within the clustering-applied region in a forward or reverse direction along the second axis by calculating similarity or dissimilarity for clustering within a clustering range as wide as the segment along the second axis based on a respective reference value set for each clustering range;
• and
• a display means for displaying the results according to a predetermined display format.