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MathGroup Archive 1993

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I want to read numbers written in E-format.

  • To: mathgroup at yoda.physics.unc.edu
  • Subject: I want to read numbers written in E-format.
  • From: Peter Whaite <peta at cim.mcgill.ca>
  • Date: Mon, 13 Dec 1993 23:46:29 -0500

I have programs that write Mma expressions to a file.  I bring this file into
Mma using Get.  Unfortunately there are numbers in the file which are
sometimes in e-format, so e.g. 1.234e+456 gets  parsed as 456 + 1.234*e.
ReadList can handle e-format numbers but I can't use it.

I can do something like...

	Unprotect[Plus];
	Plus[mant_?NumberQ, Times[expon_?NumberQ, e]] := mant*10^expon;
	Protect[Plus];

Is there a better way? 





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