https://github.com/RomaTeng/EKF-SLAM-on-Manifold
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Tip revision: 12d7d8d88c84161baed173e38d49dedb4adb2b96 authored by Teng Zhang on 26 February 2017, 15:09 UTC
Record my control paper
Tip revision: 12d7d8d
REKF_plot_rms_nees.m
function [RMS_position, RMS_orientation, NEES_pose, NEES_orientation] = REKF_plot_rms_nees( estimation_results, data, do_vis )
% plot rms and nees for R-EKF
N  = size(estimation_results, 2);

T = 2:N;
RMS_position=[];
RMS_orientation=[];
for i = T
    position = estimation_results{i}.position;   
    ap = data.poses.position(:,i);
    
    RMS_position = [RMS_position norm(position-ap)];
    RMS_orientation=  [RMS_orientation norm(so3_log(estimation_results{i}.orientation*(data.poses.orientation(3*i-2:3*i,1:3))'))];
       
end

fprintf( 'mean(RMS:Position) = %f\n', mean(RMS_position) );
fprintf( 'mean(RMS:Orientation) = %f\n', mean(RMS_orientation) );


if do_vis == 1
    figure;

    subplot(2,2,1);plot(T, RMS_position);
    title('RMS:position(meter)');xlim([0,N]);
    subplot(2,2,2); plot(T,RMS_orientation);
    title('RMS:orientation(radius)');xlim([0,N]);
end

NEES_pose=[];
NEES_orientation=[];
for i = T
    position = estimation_results{i}.position;   
    ap = data.poses.position(:,i);
    
    dw=so3_log(estimation_results{i}.orientation*(data.poses.orientation(3*i-2:3*i,1:3))');
    dv=(jaco_r(-dw))\( (estimation_results{i}.position-estimation_results{i}.orientation*data.poses.orientation(3*i-2:3*i,1:3)'*data.poses.position(:,i)));
    %dv=( (estimation_results{i}.position-estimation_results{i}.orientation*data.poses.orientation(3*i-2:3*i,1:3)'*data.poses.position(:,i)));
    

     cov_o=estimation_results{i}.cov(1:3,1:3);
     cov_pose=estimation_results{i}.cov(1:6,1:6);

     invcov_o=eye(3)/cov_o;
     invcov_pose=eye(6)/cov_pose;
    dP=[dw;dv];
    
    NEES_orientation = [NEES_orientation dw'*invcov_o*dw/3];
    NEES_pose=  [NEES_pose dP'*invcov_pose*dP/6];
       
end

fprintf( 'mean(NEES:Position) = %f\n', mean(NEES_pose(2:end)) );
fprintf( 'mean(NEES:Orientation) = %f\n', mean(NEES_orientation(2:end)) );

if do_vis == 1
    subplot(2,2,3);
    plot(T,NEES_orientation);
    title('NEES:orientation');xlim([0,N]);
    subplot(2,2,4);
    plot(T,NEES_pose);
    title('NEES:pose');xlim([0,N]);
end

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