[I'm sending this to the list. Alain, SF seems to have rejected your message. Please, make sure that you send messages to the PyTables list from a *subscribed* address]
A Dimecres 07 Febrer 2007 12:05, escriguéreu: > Hi Francesc, > > > > I created an Earray with shape = (1,0) > > > > a = tables.Float64Atom(shape=(1,0), flavor='numpy') > > hdfarray = fileh.createEArray(fileh.root, 'array_float', a, "Floats") > > > > I have initialized the array with initial values. > > Now I would like to change for example second value : hdfarray[2]= 22.22 > > This returns index error. > > I tried with hdfarray[0][2] this gives no error but the change is not > effective. > > > > I put in attached file a small program reproducing my pbm This is not bug. The problem is that you have specified the [0,2] element as [0][2]. The first index ([0]) returns a numpy array, and the second index ([2]) returns the third element of this numpy array, so that: hdfarray[0][2] = 22.22 only modifies the 3rd element of the numpy object *in memory* and does nothing more. Use the idiom: hdfarray[0,2] = 22.22 and your difficulties will fade out. > P.S. I used the shape (1,0) because it gives me much more powerful > performance than shape (0,) More performance? can you send me some figures or benchmarks about this?. I'd be interested in solving possible problems here. Cheers, -- >0,0< Francesc Altet http://www.carabos.com/ V V Cárabos Coop. V. Enjoy Data "-" ------------------------------------------------------------------------- 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 _______________________________________________ Pytables-users mailing list Pytables-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pytables-users
