how to search date format in array

[Bob_Schor]

I don't have LabVIEW 8.2, but I'm reasonably certain these functions are present in that Version.  I was sorry to see the code you posted for the Date Search routine -- you clearly don't know about LabVIEW's Loop structures, nor have paid attention to the Help for the Scan from String function.

This Snippet takes an Array of Strings and passes it to a For loop (which is designed to test every element of an Array, without needing any explicit count of the Array size).  We use the Default input of Format Into String to define the output in case the Scan fails (which it will for a String that doesn't match the Date format you specify).  We also test the Offset Past Scan output which will be 0 if the Scan fails, and >0 if the Scan succeeds.  We use the Boolean >0 for two purposes -- first, if it is True, we have found the first Date, so we "Conditional Stop" the For Loop (and output the scanned TimeStamp), and we also bring this out of the For Loop as a TimeStamp Found indicator.

If the TimeStamp is found in the String, the TimeStamp Found Boolean will be True, the TimeStamp Out will be the decoded TimeStamp, and TimeStamp index will be the Index into the Input Array of the (first) found TimeStamp.  If no TimeStamp is found in the String Array, TimeStamp Found will be False, TimeStamp Out will be the default TimeStamp (numerically 0), and the TimeStamp Index (which won't be valid, since TimeStamp Found is False) will point to the last element of the Array.

I'm not sure what you intended to do with your sub-VI, but this does most of the work for you.

Bob Schor

[GokulGKM]

this also not working.whenever i run 1'st time working correctly next time a while loop is stop 1'st iteration but that time search string numeric format not date format. 

[crossrulz]

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@GokulGKM wrote:

this also not working.whenever i run 1'st time working correctly next time a while loop is stop 1'st iteration but that time search string numeric format not date format. 

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I think you need to show more context here.  You code works perfectly for me based on the data use supplied.

[Bob_Schor]

Please post the failing code, as well as a data sample so we can test it and figure out why code works for us and fails for you.  It seems likely that you are doing something wrong, but without seeing the code (post VIs, please) and data, it is difficult to say where the problem could be.

Bob Schor

[altenbach]

The main problem is that timestamps could be a few seconds off, so the match will fail.

If the input array is sorted in time, I would probably just covert everything to DBL and use interpolate array to find the closest index.

Here's a draft. Modify as needed.