Thank you all for your help. I am a decent programmer in another language but new to Python and I have some issues with a project I am working on. Some suggested using pandas but I am barley starting on Numpy. The suggestions were very helpful, however, I decided to replace the 2D array with several single arrays b/c the arrays are of different data types. I ran into another problems and am almost done but got stuck.
Part of my code is below. The question is how to put the variables for each j into a 14 by 6 array by a statement at the end of this code. I was hoping to get an array like this one below: [2013 TT1 TT2 TT3 TT4 TT5 TT6] [2012TT1 TT2 TT3 TT4 TT5 TT6] . . [1999TT1 TT2 TT3 TT4 TT5 TT6] for j in range(14) for i in range(200): if TYear[i]==2013-j: if TTrea[i]=='T1': TT1+=TTemp[i] elif TTrea[i]=='T2': TT2+=TTemp[i] elif TTrea[i]=='T3': TT3+=TTemp[i] elif TTrea[i]=='T4': TT4+=TTemp[i] elif TTrea[i]=='T5': TT5+=TTemp[i] elif TTrea[i]=='T6': TT6+=TTemp[i] _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor