[SciPy-User] dtype of LabView binary files
Tue Nov 9 22:08:55 CST 2010
On 11/9/2010 2:34 PM, Xunchen Liu wrote:
> It seems there is only one web page here talking about the dtype of the
> binary file saved from Labview:
> I followed Travis' suggestion on that page to convert one of my Labview
> binary file using
> but this gives a array doubled the shape of my recorded data and also
> the value of the data are not right.
> For example, the attached is the text file and binary file saved by Labview.
> the text file reads:
> array([-2332., -2420., -2460., ..., 1660., 1788., 1804.])
> while the binary file reads (with dtype='>d')
> array([-3.30078125, 0. , -3.30297852, ..., 0. ,
> -2.6953125 , 0. ])
> Anyone knows what dtype I should use, or how should I build the correct
> dtype for it?
> Thanks a lot!
> Xunchen Liu
Those data are big Endian, 80-bit IEEE extended-precision numbers,
flattened to 128-bit extended-precision in the binary file. Not sure
if/how such data can be read into numpy without bit manipulations.
More information about the SciPy-User