Possible bug: Saving array with extended and double precision to spreadsheet
If one concatenates a double precision array and an extended precision array with the "build array" vi and then saves using "Write to Spreadsheet File" vi any digits to the right of the decimal place are set to zero in the saved file. This happens regardless of the format signifier input (e.g. %.10f) to the "Write to Spreadsheet File" vi.
I am on Vista Ultimate 32 bit and labview 9.0
This is a possible bug that is easily circumvented by converting to one type before combining arrar to a spreadsheet. Nonetheless, it is a bug and it cost me some time.
Solved!
Go to Solution.
Attachments:
Spreadsheet save bug.vi 9 KB
Hi JL,
no, it's not a bug - it's a feature
Well, if you would look more closely you would recognize the "Save to Spreadsheet" as polymorphic VI. As this polymorphic VI doesn't support EXT numbers internally (it only supports DBL, I64 and String) LabVIEW chooses the instance with most accuracy: I64 (I64 has 64 bits precision, DBL only 53...). So your options are:
- set the instance to use as DBL (by right-click and "Select type...")
- make a copy of this VI, save it with a different name and make it support EXT numbers (don't rework the polymorphic VI as you would break compatibility with other LV installations or future revisions)
And yes, those coercion dots always signal some conversions - you should atleast check what's going on there...
Message Edited by GerdW on 05-21-2010 10:01 PM
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome
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About the develop question please post to the MSDN forum.
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change it to
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since "this" is a reference to the Main class (root) it surely won`t function as you intend it to.
if (false){
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makes no sense to use a condition that can never be true -
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<<KUDOS ARE WELCOME>>
ELECTRO SAM
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In our files, we have a mixture of spaces and tabs as a delimeter. How do I convert a double array into a string?
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BobI have an External Table defined with fixed record size, using Oracle 10.2.0.2.0 on HP/UX. At 279 byte records (1 or more fields, doesn't seem to matter), it can read almost 5M bytes in the file (17,421 records to be exact). At 280 byte records, it can not, but blows up with "partial record at end of file" - which is nonsense. It can read up to 3744 records, just below 1,048,320 bytes (1M bytes). 1 record over that, it blows up.
Now, If I add READSIZE and set it to 1.5M, then it works. I found this extends further, for instance 280 recsize with READSIZE 1.5M will work for a while but blows up on 39M bytes in the file (I didn't bother figuring exactly where it stops working in this case). Increasing READSIZE to 5M works again, for 78M bytes in file. But change the definition to have 560 byte records and it blows up. Decrease the file size to 39M bytes and it still won't work with 560 byte records.
Anyone have any explanation for this behavior? The docs say READSIZE is the read buffer, but only mentions that it is important to the largest record that can be processed - mine are only 280/560 bytes. My table definition is practically taken right out of the example in the docs for fixed length records (change the fields, sizes, names and it is identical - all clauses the same).
We are going to be using these external tables a lot, and need them to be reliable, so increasing READSIZE to the largest value I can doesn't make me comfortable, since I can't be sure in production how large an input file may become.
Should I report this as a bug to Oracle, or am I missing something?
Thanks,
Bob -
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