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Message: [QUOTE="Jianzhong Liu, post: 2047933"] Hello, Guys, I have a question about the linear_least_squares in Numpy. My linear_least_squares cannot give me the results. I use Numpy1.0. The newest version. So I checked online and get your guys some examples. I did like this. [john@crux 77] ~ >> py Python 2.4.3 (#1, May 18 2006, 07:40:45) [GCC 3.3.3 (cygwin special)] on cygwin Type "help", "copyright", "credits" or "license" for more information. Matrix([[1], [2], [4]])Matrix([[1, 1], [1, 2], [1, 3]]) Here my Numpy stops. and never give me a result. THis is the problem of Numpy or sth wrong. Can you guys give me a LinearAlgebra.py so that I can have a try? Thanks, John [/QUOTE]