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Demo file problems: script versus command line

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I have just installed gnuplot on my Mac OSX machine (details below) and started exploring the demo files. Some demo scripts work as expected, but I'm seeing errors in a few cases I should appreciate any guidance with the following:

First problem: simple.dem
Running script:
gnuplot> load "simple.dem"
Gives error message: "simple.dem", line 11: undefined variable: x

Copying line 11 from the script (using BBedit), and launching from command line:
gnuplot> plot [-10:10] sin(x),atan(x),cos(atan(x))
plots just fine.

So, what do I need to change to make he script work?


Second problem: airfoil.dem
Running script:
gnuplot> load "airfoil.dem"
"airfoil.dem", line 132: ';' expected
Gives only partial output.

This is what code looks like in BBedit
130  plot airfoil_x(t), airfoil_y(t) title "mean line" w l 2, \
131  airfoil_x(t), airfoil_y1(t, thick) title "upper surface" w l 1, \
132  airfoil_x(t), airfoil_y2(t, thick) title "lower surface" w l 1
133  pause -1 "Press Return"


Any help much appreciated!
Adrian Land
San Carlos CA


iMac  OSX  10.6.8  Snow Leopard

Xcode 3.2 from Snow Leopard DVD

AquaTerm 1.1.1

Macports 2.3.1 from web
sudo port install gnuplot

Gnuplot
Version 4.6 patchlevel 5    last modified February 2014
	Build System: Darwin i386

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Demo file problems: script versus command line land_adrian@hotmail.com - 2014-07-20 14:00 -0700
  Re: Demo file problems: script versus command line Ethan A Merritt <EAMerritt@gmail.com> - 2014-07-20 20:24 -0700
  Re: Demo file problems: script versus command line land_adrian@hotmail.com - 2014-07-21 18:00 -0700
    Re: Demo file problems: script versus command line land_adrian@hotmail.com - 2014-07-21 20:08 -0700

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