On Monday 24 July 2006 12:36, Travis Oliphant wrote: > Sebastian Haase wrote: > > Hi, > > if I have a numpy array 'a' > > and say: > > a.dtype == numpy.float32 > > > > Is the result independent of a's byteorder ? > > (That's what I would expect ! Just checking !) > > I think I misread the question and saw "==" as "=" > > But, the answer I gave should still help: the byteorder is a property > of the data-type. There is no such thing as "a's" byteorder. Thus, > numpy.float32 (which is actually an array-scalar and not a true > data-type) is interepreted as a machine-byte-order IEEE floating-point > data-type with 32 bits. Thus, the result will depend on whether or not > a.dtype is machine-order or not. > > -Travis Hi, I just realized that this question did actually not get sorted out. Now I'm just about to convert my code to compare arr.dtype.type to the (default scalar!) dtype numpy.uint8 like this: if self.img.dtype.type == N.uint8: self.hist_min, self.hist_max = 0, 1<<8 elif self.img.dtype.type == N.uint16: self.hist_min, self.hist_max = 0, 1<<16 ...
This seems to work independent of byteorder - (but looks ugly(er)) ... Is this the best way of doing this ? - Sebastian Haase ------------------------------------------------------------------------- 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
