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Re: Corrected DateList

• To: mathgroup at smc.vnet.net
• Subject: [mg127328] Re: Corrected DateList
• From: "Benedetto Bongiorno" <bongiob at sbcglobal.net>
• Date: Tue, 17 Jul 2012 01:31:25 -0400 (EDT)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com
• Delivered-to: mathgroup-newout@smc.vnet.net
• Delivered-to: mathgroup-newsend@smc.vnet.net

Participants,

 

Found problem.

If incorrect string date is in large data set, it will hang up routine
without error message.

 

Thank you.

 

Ben

 

From: Benedetto Bongiorno [mailto:bongiob at sbcglobal.net] 
Sent: Monday, July 16, 2012 9:03 AM
To: 'mathgroup at smc.vnet.net'
Cc: 'support at wolfram.com'
Subject: [mg127328] Corrected DateList

 

Participants,

 

I have had difficulty in using the DateList function.

I am to convert string  dates "mm/dd/yyyy"  to  a date list
{YYYY,MM,DD,0,0,0}.

I have large data sets of approx. 400,000.

Using the following routine, Mathematica hangs and does not produce any
result.

 

Corrected Routine;

 

lst=Range[1,Length[data]];

ParallelMap[DateList[{data[[#,5]],{"Month","/","Day","/","Year"}}]&,lst]

 

Abort does not work. I need to do a hard Mathematica close.

 

The problem seems to occur when the dataset is between 200,000 and 300,000.

The routine has worked with data sets of less than 200,000.

 

Any idea as to what causes the problem?

 

Microsoft 7 (64bit), 18Gigs memory, Intel Xeon

Mathematica 8.04

 

Thank You,

 

Ben

 

Benedetto Bongiorno CPA CRE

Cell 214-707-6546

Land 972-470-9138

Fax 972-470-9748

bongiob at sbcglobal.net

 

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