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RE: machine-size problem again?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg37512] RE: [mg37474] machine-size problem again?
  • From: "David Park" <djmp at earthlink.net>
  • Date: Sat, 2 Nov 2002 03:30:45 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

Wen-Feng,

Try

Plot[E^x, {x, 1, 4}]

A small e has no special meaning or value in Mathematica, so e^x does not
evaluated to a number. Capital E stands for the exponential constant. You
can also use esc e e esc, or enter it from the BasicInput Palette.

David Park
djmp at earthlink.net
http://home.earthlink.net/~djmp/

From: Wen-Feng Hsiao [mailto:wfhsiao at libra.seed.net.tw]
To: mathgroup at smc.vnet.net

Dear experts,

I have a trouble in plotting e^x.
Plot[e^x, {x, 1, 4}]

It keeps telling me:
e^x is not a machine-size real number at x = 1.000000125
e^x is not a machine-size real number at x = 1.1217009747187472
e^x is not a machine-size real number at x = 1.2544263995781209;

Even I have added the modifier "Evaluate".
Plot[Evaluate[e^x], {x, 1, 4}]
The output is the same.

Please help! Thanks.



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