MathGroup Archive 2001

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Functions with Variables with Indices

  • To: mathgroup at
  • Subject: [mg29394] Functions with Variables with Indices
  • From: "Benjamin Müller" <Benjamin.M at>
  • Date: Sat, 16 Jun 2001 22:43:45 -0400 (EDT)
  • Sender: owner-wri-mathgroup at

I recently began programming Mathematica and wonder if it is possible to
plot functions with variables that have indices. There's always the error:
f[variable with index] is not a machine-size real number at ... . Variables
without index and following blank (i.e. f[x_]) work fine. However, the
kernel doesn't understand the blank_ after a variable with index and
interprets this as "Times". Is there an easy solution, without programming
several lines to make the kernel understand the subscript in the right way?

Thanks a lot,


e-mail response appreciated: Benjamin.M at

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