www.pudn.com > trackingdemos.zip > plot_sigma_rb.m

% plot_sigma_rb.m 
% standard deviations of range and bearing measurements 
% using finite sensor resolution model 
function fig = plot_sigma_rb() 
r = linspace(.1, 4, 40); 
b = linspace(.1, 4, 40); 
 
for i=1:length(r) 
    if r(i)<1 
        sr(i) = 1; 
    elseif r(i)<3 
        sr(i) = 1-(1-1/sqrt(12))*(r(i)-1)/2; 
    else 
        sr(i) = 1/sqrt(12); 
    end 
end 
 
for i=1:length(b) 
    if b(i)<1 
        sb(i) = 1; 
    elseif r(i)<3 
        sb(i) = 1-(1-1/sqrt(12))*(b(i)-1)/2; 
    else 
        sb(i) = 1/sqrt(12); 
    end 
end 
 
fig = figure; 
plot(r,sr) 
xlabel('\Deltar/C_r or \Deltab/C_b'); 
ylabel('\sigma_r/C_r or \sigma_b/C_b'); 
title('Measurement error vs. target separation in range and bearing');