Re: Writing/appending tables to CSV files?

*To*: mathgroup at smc.vnet.net*Subject*: [mg48867] Re: Writing/appending tables to CSV files?*From*: Bill Rowe <readnewsciv at earthlink.net>*Date*: Sun, 20 Jun 2004 02:39:19 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

On 6/19/04 at 4:31 AM, greenberg at ucdavis.edu (Jonathan Greenberg) wrote: >Whats the best way to initialize and write to a csv file in >Mathematica, given a loop that produces a 1 x N vector each time >(which I want saved) -- I want the final CSV file to be M x N, >where M is the number of iterations of the loop and N is the length >of the output vector. Thoughts? The simplest way would be to build up a matrix with the results then write the matrix with all M vectors to a file using Export. For example data= Table[ Table[Random[],{5}],{9}] puts a 9 x 5 array in data This can be written to a CSV file by either Export["filename", Transpose@data, "CSV"] which will result with filename containing a 5 x 9 array in CSV format It is also possible to write out each 1 x N vector to a file and later create a M x N CSV file. But this would involve more complicated code with more read/write operations and likely will run slower. -- To reply via email subtract one hundred and four