% plt50.m ------------------------------------------------------------
%
% This script is similar to plt5.m except the number of functions plotted has
% been increased to 50 to demonstrate the use of the TIDcolumn parameter.
% Normally the legend is rendered in a single column; but with this many
% traces, the trace IDs fit much more comfortably in two columns. The
% 'TIDcolumn',25 included in the plt argument list actually specifies the
% number of items to put in the second column, which in this example means
% that both columns will contain 25 items.
%
% With so many traces, the utility of using the legend to selectively enable
% or disable individual traces becomes even more compelling. Although the
% traces and the legend are color coded, it's difficult to distinguish every
% trace based on color, so clicking on a legend item is often necessary
% to uniquely identify a trace. This also is essential when you need to reduce
% the clutter that often results from plotting so many traces.
%
% The 'Position' parameter is used to increase the figure area about 30%
% from the default of 700x525 pixels to 800x600 to make the plot less crowded.
% ----- Author: ----- Paul Mennen
% ----- Email: ----- paul@mennen.org
t = (0:399)/400; u = 1-t; % create the x-axis data
y1 = 8.3 - 1.4*exp(-6*t).*sin(70*t); % prototype for traces 1-10
y2 = 2 * t .* cos(15*u.^3) + 6; % prototype for traces 11-20
y3 = 5 - 2*exp(-1.4*t).*sin(30*t.^5); % prototype for traces 21-30
y4 = u .* sin(20*u.^3) + 3; % prototype for traces 31-40
y5 = (y1+y2+y3+y4)/2 - 10; % prototype for traces 41-50
w = ones(10,1); s = 5.3*(t-.5); % used to expand 5 traces into 50
v = repmat((10-cumsum(w))*(sqrt(16-s.*s)-3)/6,5,1);
y = [y1(w,:);y2(w,:);y3(w,:);y4(w,:);y5(w,:)] + v; % plot y (50 x 400 matrix)
plt(t,y,'FigName','plt50','TIDcolumn',25,'Position',[10 50 770 580]);
