You must add the plplot_octave script installation directory to Octave
LOADPATH *before* the standard Octave LOADPATH. The best way is to
create a ~/.octaverc file. By default

LOADPATH ="/usr/local/share/plplot_octave//:"

Then, invoke Octave and create a vector, say

	octave:1> x=-pi:0.1:pi;

and plot it

	plot(x,sin(x))

change the legend:

	plot(x,sin(x),';Sin(x);')

set the title and plot data points
	
	title "My first plot";
	plot(x,sin(x),'-o;Sin(x);')

change the legend position

	legend ("opaque",0.8,0.5);
	plot(x,sin(x),';Sin(x);');

save you plot in color postscript

	save_fig ("~/sin.ps","psc")

and see the result
	
	system("gv ~/sin.ps")

create a new plot window using the tk driver

	fig(1,"tk")

Use uper an subscript in captions

	title("Sin(x#u2#d)")
	plot(x,sin(x),'-o;Sin(x#u2#d);',x,cos(x),'y');

close the previous window

	closefig(0)

and read the online help

	help plot
	help help __pl_opt

and try it! Bellow is a short description of the available commands.
You also have access to the PLplot API, 

	help plfill

		plfill(x, y)

		   Original PLplot call documentation:

		   plfill(n, x, y) ...

Notice that you don't need to specify vector or matrix dimensions.


--- Plot window control
fig,
figure		-- Set the current plot window or creates a new one.

closefig	-- Close a plot window.
closeallfig	-- Close all plot windows.

free_fig	-- Return the number of an unused plot figure.

save_fig	-- Save or prints the current plot figure.
lp_setup	-- Set printer command and options for use with `save_fig'.

--- 2D Plots
loglog,
semilogx,
semilogy,	-- Make 2D plots in log scales.
plot		-- Plot scalar, vector or matrices in various point and line styles.
mplot		-- Plot multiple plots per figure.
polar		-- Make a 2D polar plot.
contour		-- Draws a contour plot.
shade		-- Shaded/contour plot of matrix.
label_plot	-- Plot data with point style, marking each point with a number or label.
fill 		-- Draw filled 2-D polygons.
arrows		-- Plot an array of arrows.

--- 3D plots
mesh		-- Surface plot.
plot3		-- three-dimensional analogue of plot.
surfl		-- Shaded Surface plot with lighting.

--- Plot control and decorations
top_title,
bottom_title	-- don't work in PLplot!
title		-- Defines a title for the next plot. 

ylabel,
xlabel,
zlabel		-- Defines a label for the x/y/z-axis of the next plot.

xticks,
yticks		-- set the x/yticks interval.

plot_border	-- Don't work in PLplot.
plot_margin	-- Set/return the status of the plot margin around the plot.

autostyle	-- If set increases line style after each plot. 
legend		-- Sets the legend position and mode.
grid		-- Turn on/off grid lines at major ticks.

axis		-- Sets the axis limits.
axis_set	-- Return current axis status.

plclg,
plclearplot	-- Clear the plot window.
fig_state	-- save/restore current figure axis and hold state.
shg		-- Show the graph window. 

--- Interative plots
stripc,
stripc_add,
stripc_del,	-- creates/plot/delete a four pen stripchart.
comet		-- Displays an animated comet plot of one the vector. 

--- Interative utilities
text		-- Place text on a 2-D graph at x y positions.
set_view 	-- Set up the altitude and azimute in degrees for posterior 3d plots.
arrow		-- Plot one arrow. 
zoom		-- Select left botton and right top area for setting axis.

--- Multiple plots
multiplot	-- Sets and resets multiplot mode. 	
oneplot		-- Switches from multiplot to single plot mode.
subplot		-- Sets plot in multiplot mode.
subwindow	-- Sets subwindow position in multiplot mode for next plot.

--- Colormaps and color utilities
blue, bone,
cool, green,
hot, copper,
pink, prism,
red, hsv	-- Several colormaps.

plcolormap	-- Set colormap1.
hls2rgb		-- Hue-lightness-saturation to red-green-blue conversion. 
rgb2hls		-- red-green-blue to hue-lightness-saturation conversion. 
rgbplot		-- Plot color map.

--- Interative mouse usage
ginput		-- Return the current mouse position in plot.
gtext		-- Place text on a 2-D graph using a mouse.

--- Utilities
clip 		-- Clip values outside the range to the value at the boundary of the range.
tdeblank	-- Remove trailing amd leading blanks from string.

--- Misc
pldef		-- set your defaults.
plsetopt	-- set/view/reset/aplly plplot options.
plimage		-- *very* preliminary!

use_plplot	-- Use/stop using plplot. Not working!
plplot_octave_path -- set or return octave_plplot scripts directory path.

plplot_stub	-- Definition of all implemented plplot API functions.
