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minor changes to matlab covariance test

release/4.3a0
Luca 2014-04-06 21:43:53 -04:00
parent d325fd1251
commit dfda7fad89
1 changed files with 10 additions and 8 deletions
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18
matlab/unstable_examples/+imuSimulator/covarianceAnalysisBetween.m
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@ -9,15 +9,17 @@ clear all
close all
%% Create ground truth trajectory
trajectoryLength = 5;
trajectoryLength = 49;
unsmooth_DP = 0.5; % controls smoothness on translation norm
unsmooth_DR = 0.1; % controls smoothness on translation norm
% possibly create random trajectory
% possibly create random trajectory as ground Truth
gtValues = Values;
gtGraph = NonlinearFactorGraph;
noiseVector = [0.01; 0.0001; 0.0001; 0.1; 0.1; 0.1];
sigma_ang = 1e-2;
sigma_cart = 0.1;
noiseVector = [sigma_ang; sigma_ang; sigma_ang; sigma_cart; sigma_cart; sigma_cart];
noise = noiseModel.Diagonal.Sigmas(noiseVector);
currentPoseKey = symbol('x', 0);
@ -44,11 +46,9 @@ end
figure(1)
hold on;
plot3DTrajectory(gtValues, '-r', [], 1, Marginals(gtGraph, gtValues));
% plot3DTrajectory(values,linespec,frames,scale,marginals)
axis equal
numMonteCarloRuns = 100;
for k=1:numMonteCarloRuns
% create a new graph
graph = NonlinearFactorGraph;
@ -62,7 +62,7 @@ for k=1:numMonteCarloRuns
for i=1:trajectoryLength
currentPoseKey = symbol('x', i);
% for each measurement. add noise and add to graph
% for each measurement: add noise and add to graph
noisyDelta = gtDeltaMatrix(i,:)' + (noiseVector .* randn(6,1));
noisyDeltaPose = Pose3.Expmap(noisyDelta);
@ -99,6 +99,7 @@ for k=1:numMonteCarloRuns
hold on
plot(NEES(k,:),'-b','LineWidth',1.5)
end
%%
ANEES = mean(NEES);
plot(ANEES,'-r','LineWidth',2)
plot(3*ones(size(ANEES,2),1),'k--'); % Expectation(ANEES) = number of dof
@ -106,10 +107,11 @@ box on
set(gca,'Fontsize',16)
title('NEES and ANEES');
%%
figure(1)
box on
title('Ground truth and estimates for each MC runs');
set(gca,'Fontsize',16)
title('Ground truth and estimates for each MC runs');
%% Let us compute statistics on the overall NEES
n = 3; % position vector dimension
@ -132,8 +134,8 @@ plot(ones(size(ANEES,2),1),'r-');
plot(r1*ones(size(ANEES,2),1),'k-.');
plot(r2*ones(size(ANEES,2),1),'k-.');
box on
title('NEES normalized by dof VS bounds');
set(gca,'Fontsize',16)
title('NEES normalized by dof VS bounds');
%% NEES COMPUTATION (Bar-Shalom 2001, Section 5.4)
% the nees for a single experiment (i) is defined as