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  • To: mathgroup at
  • Subject: [mg128105] Export
  • From: Adel Elsabbagh <aelsabbagh at>
  • Date: Sun, 16 Sep 2012 03:23:34 -0400 (EDT)
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Dear friends,

I am trying to export a 30*30 matrix (M) with entries function in x and y
to a txt file in order to use it by another program. I am using:
Export["filename.txt",M]. I have two problems:
1. I want to reduce the precision of the coefficients of x & y. When I use
N[M,n] or SetPrecision[M,n], the precision is reduced within the Notebook
but not in the exported file. How to reduce the precision in the exported
2. Some entries look like "5*x + 3*y", which leaves spaces around the plus
or minus signs. Is there a way to tell Mathematica not leave these spaces
because the other program assumes that this is a new column?

I also tried to write M//InputForm and just copy and past it, but I get a
lot of expressions such as 1.935*^-6 which the other software cannot
understand. Is there a way to write it in the form:  1.935e-6?

Thanks in advance

Adel Elsabbagh
ASU Sound & Vibration Lab
Faculty of Engineering - Ain Shams University
Cairo, Egypt 11517
Tel: +202 26828114

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