Comma Delimited Files
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Revision as of 20:52, 15 May 2010
Comma Delimited Files
Syntax: | File(LUN)CSV ! Treat this text file as Comma delimited |
Discussion: |
Comet Text files may be treated as Comma Delimited Files (CSV or Comma Separated Values).
For a discussion of how Comma Delimited Files are formatted, <a href="http://en.wikipedia.org/wiki/Comma-separated_values"> Look Here.</a> CSV files are a convienient way to treat data for import or export to other windows applications. To tell Comet to start treating a file as CSV, just execute the fillowing file statement: File(LUN)CSV |
Example 1: Writing a CSV record. |
Length 200 & Local A$ B$ C$ Length 15.0 & Local I Length 15.3 & Local J K Length 10.10 & Local L Fmt: Format A$;B$;C$;I;J;K;L Clear Print(Et) Erase 'xxx.Csv', Dir='cos' Excp=Eok Eok: Create 'xxx.Csv', Dir='cos' Close(1) & Open(1) 'xxx.Csv', Dir='cos' File(1)Csv A$ = 'simple String' B$ = ' String With Embeded Double "Quotation""Marks' ! Leading Blank C$ = ' String Including A, Comma ' ! Trailing Blank I = -10 J = 10.34 K = -99.345 L = -.00012345 Write(1,Fmt) Stop In the above example, three string variables and four numeric variables are written to a record in a text file. The result looks like this: simple string," String with embeded double ""Quotation""""marks"," String including a, comma",-10,10.340,-99.345,-0.0001234500 Notice that double quotes surround fields containing double quotation marks or commas. Double quotes within a field are escaped by placing another double quote before them. Leading minus signs are used for negative numbers. |
Example 2: Reading a CSV record |
Length 200 & Local A$ B$ C$ Length 15.0 & Local I Length 15.3 & Local J K Length 10.10 & Local L Fmt: Format A$;B$;C$;I;J;K;L Clear Print(Et) Close(1) & Open(1) 'xxx.Csv', Dir='cos' File(1)Csv Read(1,Fmt) Print 'a$=';A$ Print 'b$=';B$ Print 'c$=';C$ Print 'i=';I Print 'j=';J Print 'k=';K Print 'l=';L Print 'done' Wait Stop The Output of this program looks like this: a$=simple string b$= String with embeded double "Quotation""marks c$= String including a, comma i= 10- j= 10.340 k= 99.345- l=.0001234500- done
The contents of string variables are not padded with blanks. They contain exactly what was in the CSV field.
A note about very large or very precise numbers: |
CSV processing was introduced in Comet 2008.