How to write Large datasets to ASCII?

[noli]

Hi,

   I am trying to save 200 million double-precision numbers to a text file, (to do further treatment with afterwards), and Labview keeps telling me it doesn't have enough memory.   I have 8GB of Ram, but here's what I've heard - I've heard that Labview tries to keep the entire dataset in memory when using "Write to a Spreadsheet File",  and I've also heard that 32-Labview 2009 can actually only use around 1G of RAM for holding your data in memory (please correct my misunderstandings)

  So my question:  I need the 200M points.  How do I get them from my PCI-5122  Digitizer into a text file?

Thanks

[GerdW]

Hi noli,

make a FOR loop, run the loop 200 times and write 1 million DBLs each iteration...

Let's do some math:

200e6 DBL = 1600e6 byte = 1.6Gbyte. Just the DBL array.

Now convert that to ASCII, using 10 chars per number: 200e6 numbers *10bytes = 2Gbyte.

In summary your conversion would need (at least) 3.6Gbyte of RAM. No 32bit program/OS can handle that...

Message Edited by GerdW on 04-30-2010 04:53 PM