Re: [Discuss-gnuradio] Question about Double / Float values in GRC

[Josh Blum]

> Is it even possible to read a file with double values using a GRC
> generated script and the gr_file_source block?  Or is there something
> else I am doing wrong?
> 

Its a 2 part problem:

Unlike gnuradio blocks, in GRC, the data type is checked. So there is no
support for double streams. However you could configure the file source
to use a byte stream w/ a vlen of 8. That would match the itemsize, but...

The other problem is that gnuradio has no blocks that use double
streams. Its wasted overhead since floats give all the necessary dynamic
range. So nobody invested any effort into it.

You may have to add a custom gnuradio block that converts a double
stream to a float stream. A set of double to<->from float blocks would
be a welcome addition.

-Josh