'newt.m' is a matlab macro file to plot velocity vs distance.
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To run it, type
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<B>matlab</B>
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In a view moment you will be in matlab environment which is 
indicated by '>>' prompt.  Then run the macro
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<B>newt</B>
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You need an output file from 'viflow7' to run the macro, in
this example it is called 'outpar1'.
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You can modify this macro using a texteditor when you logon to
SUN/HP unix computer.  Some of the modifications you can make
are:
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- change the word 'outpar1' with the name of your output file
from viflow7.
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- change the parameters to be plotted.  By now, you probably
should know that the output from viflow has numbers arranged
in three columns which correspond to time, velocity, and 
distance.  Say, you want to plot velocity vs time, the changes
are as follows:
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<B>x=outpar1(:,1);
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y=outpar1(:,2);</B>
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here, time is assigned as x values, and velocity is assigned
as y values
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- Change the label (x and y) and the title.  Simply change the
appropiate names within the quote on commands xlabel, ylabel,
and title.
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- Advanced changes: you can combine different curves on one
plot.  For example, files outpar1 and outpar2 want to be out
in one plot.  Add the following lines to the macro file.
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<B>hold on<P>
load outpar2;<P>
x=outpar2(:,3);<P>
y=outpar2(:,2);<P>
h=plot(x,y);<P>
xlabel 'Distance (m)';<P>
ylabel 'Velocity (m/s)';<P>
title 'Newtonian Model for n=0.075';</B>
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Note that they are basically similar to commands inside the
macro file with the exception 'clear all' change to 'hold on'.
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Those commands can be repeated to add additional curves.