The basic_lite the function linear_least_squares begins with the statements: a = asndarray(a) b = asndarary(b) The first produces an error: File "C:\Python24\lib\site-packages\scipy\basic\basic_lite.py", line 414, in linear_least_squares a = asndarray(a) NameError: global name 'asndarray' is not defined The second is in any case misspelled. Changing both to asarray allows the function to work; is it the right solution? Alan Isaac