concen.m

matlab宝典,电子工业出版社,包含该书的源码2-4章

function [r1, r2] = concen(toxtest);
% Create two vectors. r1 contains the ratio of mercury to lead
% at each observation. r2 contains the ratio of lead to chromium.
r1 = [toxtest.mercury] ./ [toxtest.lead];
r2 = [toxtest.lead] ./ [toxtest.chromium];

% Plot the concentrations of lead, mercury, and chromium
% on the same plot, using different colors for each.
lead = [toxtest.lead];
mercury = [toxtest.mercury];
chromium = [toxtest.chromium];

plot(lead, 'r','LineWidth',1.5);   hold on
plot(mercury, 'b','LineWidth',1.5)
plot(chromium, 'y','LineWidth',1.5);   hold off

legend('lead','mercury','chromium')
title('The ratio of mix')
grid