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Re: Export with append??
Posted:
Jan 14, 2013 11:28 PM
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Hello,
With a command like
Export["myfile.dat", results, "List" ]
is there a way to append the results to an existing myfile.dat, rather
than creating or overwriting an existing file?
thanks for your help,
Maarten
Hi, Maarten,
A simple workaround is to import your file, append a new file to it and then - to export the combined list. Assume that your mathematica notebook entitled "trialImportExport.nb" is situated in the same folder as the already existing list entitled "myfile.dat".
To be precise I generated the file myfile.dat with the list:
{25, 36, 49}
in it. Assume further that I want to append the list
{a,b,c}
to it. Then the code
lst1=Import[NotebookDirectory[]<>"myfile.dat"]//Flatten;
lst2={a,b,c};
lst3=Append[lst1,lst2]//Flatten;
Export[NotebookDirectory[]<>"myfileNew.dat",lst3]
Does the job. The output cell below:
D:\Documents and Settings\ABo\My Documents\Works\Mathematica_works\Examples\TrialFiles\myfileNew.dat
shows that the file has been successfully exported.
I intentionally gave the resulting file a new name, "myfileNew.dat", to check the result, but the old name can also be given to it.
Have fun, Alexei
Alexei BOULBITCH, Dr., habil.
IEE S.A.
ZAE Weiergewan,
11, rue Edmond Reuter,
L-5326 Contern, LUXEMBOURG
Office phone : +352-2454-2566
Office fax: +352-2454-3566
mobile phone: +49 151 52 40 66 44
e-mail: alexei.boulbitch@iee.lu<mailto:alexei.boulbitch@iee.lu>
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