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北京天演融智软件有限公司（科学软件网）前身是北京世纪天演科技有限公司，成立于2001年，专注为国内高校、科研院所和以研发为主的企事业单位提供科研软件和服务的国家。
Fixed recently introduced bug in matrix algebra which made it difficult to type complex commands
Changed Tools|Similarities routine so that choosing AVG Cross Products gets you that, rather than the projected cross products you would have gotten if you hadn't had any missing data (i.e., avg cross products multipled by N).
A free trial version is available (very useful for giving workshops!). The trial version is identical to the regular version -- except that it has an expiration data. We also offer deep discounts for students and site licenses (click on pricing for more information). The program may be purchased online.
Fixed Networks|Subgroups|Girvan-Newman to match NetDraw algorithm. Previously, when two ties had equal betweenness, one was selected for deletion and then betweenness recalculated. Now, both ties are removed before recalculation. Also made changes to minimize round-off error
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