。[img]http://www.ncss.com/images/doubledendro.jpg[/img][b]GESS [/b]makes statistical analysis of microarray gene expression data fast and easy. With this well-documented package, you will not have to worry about complex programming or confusing statistical output. Because this software was developed by a company with over 20 years of experience creating commercial statistical software, you will be confident with your results. GESS is a standalone system. Although it is integrated with NCSS, you do not have to own NCSS to run it. You can use it with any statistical software you want. GESS comes with electronic (pdf) manuals that contain tutorials, examples, annotated output, references, formulas, and complete instructions on each procedure. And, if you cannot find an answer in the manual, our free technical support staff (which includes three Ph.D. statisticians) is available. [b]Array Quality and Filtering[/b]Graphical and numeric summaries, designed to quickly alert the user to artifacts, bad spots, spatial anomalies, or poor arrays, are easily obtained for each array. Expression values may be filtered according to well-described criteria. Several normalization procedures are also on hand. [img]http://www.ncss.com/images/doubledendro.jpg[/img][b]Statistical Analysis[/b]A wide variety of statistical analyses is available. Each technique is well-documented and described in easy-to-understand terms. Graphical summaries of statistical output help interpret the results. Follow-up statistical analyses are obtained with over 150 statistical procedures in NCSS. [b]Choose GESS.[/b] It‘s more comprehensive, easier-to-use, accurate, and less expensive than any other microarray statistical analysis program on the market.