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Re: Reading 32-bit complex numbers in IDL (16-bit real / 16-bit imaginary) [message #77175 is a reply to message #77112] Fri, 12 August 2011 06:15 Go to previous messageGo to previous message
Waqas A. Qazi is currently offline  Waqas A. Qazi
Messages: 3
Registered: August 2011
Junior Member
Hi chl and wox,

Thanks, I took up from the info both of you noted here, and did some
reading on my own.

It seems the numbers are indeed half-precision floating point (never
knew this was a data-type!), but in the data storage here, they are
specified as integers and should be read as such. The data
specification document states clearly that "samples are stored as 16
bit / 16 bit complex integer (4 bytes).

Wox, I understand the logic you have presented, and I will follow
that, but have one question. After defining an intarr (16 bit) and
reading 2-byte integers and later pairing them up for intput into the
complex function, why do I have to convert from integer to float
first? I think that the complex function should automatically convert
them to single-precision float complex??


Thanks,
Waqas.

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