Hi Adrian, > I tried to load data from a csv file into numpy using genfromtxt. I need > only a subset of the columns and want to apply some conversions to the > data. attached is a minimal script showing the error. > In brief, I want to load columns 1,2 and 4. But in the converter > function for the 4th column, I get the 3rd value. The issue does not > occur if I also load the 3rd column. > Did I somehow misunderstand how the function is supposed to work or is > this indeed a bug?
not sure whether to call it a bug; the error seems to arise before reading any actual data (even on reading from an empty string); when genfromtxt is checking the filling_values used to substitute missing or invalid data it is apparently testing on default testing values of 1 or -1 which your conversion scheme does not know about. Although I think it is rather the user’s responsibility to provide valid converters, probably the documentation should at least be updated to make them aware of this requirement. I see two possible fixes/workarounds: provide an keyword argument filling_values=[0,0,'1:1’] or add the default filling values to your relEnum dictionary, e.g. { … '-1':-1, '1':-1} Could you check if this works for your case? HTH, Derek _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion