okay, I went back to the binary windows distrib. Based on Keths code I wrote
>> print numpy.asmatrix(all_dates == start_dates[row],dtype=int) [[0 0 0 0 0 0 0 0 0 0 0 1 0 0]] >> [row,numpy.asmatrix(all_dates == start_dates[row],dtype=int)] = -1 >> print A[row,:] [[-1. -1. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0.]] huh? It set the first 2 elements and not the 12'th!! Mathew Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Numpy-discussion mailing list Numpy-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/numpy-discussion