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Some practical matlab command in processing data, plot experimental results

  • how to read text file, for example

    filename = '.\yourfilename.txt';
[a1,a2,a3...] = textread(filename,'%s%s%s%s%s%s%s%s%s%s%s%s%s','delimiter',',');
data = [a2,a3,a4];

[data1,data2,data3]=textread('myfiles.txt','%n%n%n','delimiter', ',','headerlines', 1);
 textread中的headerlines指明了跳过几行，1可自由设定

  • how to read excel file, for example

    data1 = xlsread('tool14');
a = data1(:,1);
%%acc_13 = data1(a==13,:);
gyro_14 = data1(a==14,:);

  • plot double y-axis for errors (translation and rotation)

    clear;
close all;

%%%%%%%%%%%% LeGOLOAMerrorTrans error
LeGoLOAMTrans_Data = csvread('LeGOLOAMerrorTrans.csv'); % AGPCerrorTrans  LeGoLOAMerrorRot
LeGoLOAMTrans_error = LeGoLOAMTrans_Data(:,1);
LeGoLOAMTrans_epoch = LeGoLOAMTrans_error;
LeGoLOAMTrans_epoch = 1:1:length(LeGoLOAMTrans_error);

%%%%%%%%%%%% AGPCerrorTrans error
AGPCSLAMTrans_Data = csvread('AGPCerrorTrans.csv'); %LeGoLOAMerrorRot AGPCerrorRot1
AGPCSLAMTrans_error = AGPCSLAMTrans_Data(:,1);  
AGPCSLAMTrans_epoch = AGPCSLAMTrans_error;
AGPCSLAMTrans_epoch = 1:1:length(AGPCSLAMTrans_error);

%%%%%%%%%%%% LeGOLOAMerrorTrans rot
LeGoLOAMRot_Data = csvread('LeGoLOAMerrorRot.csv'); % AGPCerrorTrans  LeGoLOAMerrorRot
LeGoLOAMRot_error = LeGoLOAMRot_Data(:,1);
LeGoLOAMRot_epoch = LeGoLOAMRot_error;
LeGoLOAMRot_epoch = 1:1:length(LeGoLOAMRot_error);

%%%%%%%%%%%% AGPCerrorRot error
AGPCSLAMRot_Data = csvread('AGPCerrorRot1.csv'); %LeGoLOAMerrorRot AGPCerrorRot1
AGPCSLAMRot_error = AGPCSLAMRot_Data(:,1);
AGPCSLAMRot_epoch = AGPCSLAMRot_error;
AGPCSLAMRot_epoch = 1:1:length(AGPCSLAMRot_error);

lineWidth = 2.9; 

yyaxis left
plot(LeGoLOAMTrans_epoch,LeGoLOAMTrans_error,'r-o','LineWidth',lineWidth )
hold on;
plot(AGPCSLAMTrans_epoch,AGPCSLAMTrans_error,'b-*','LineWidth',lineWidth )
hold on;
grid on;
hold on;
ax = gca;
ax.FontSize = 30; 
xlabel('epoch (second)');
ylabel('translation error (meter)');
% legend('\fontsize{25} LeGO-LOAM translation error','\fontsize{25} AGPC-SLAM translation error');

yyaxis right
plot(LeGoLOAMRot_epoch,LeGoLOAMRot_error,'g-o','LineWidth',lineWidth )
hold on;
plot(AGPCSLAMRot_epoch,AGPCSLAMRot_error,'c-*','LineWidth',lineWidth )
hold on;
grid on;
hold on;
ax = gca;
ax.FontSize = 30; 
% xlabel('epoch (second)');
% ylabel('error (meter)');
ylabel('rotation error (degree)');
legend('\fontsize{25} LeGO-LOAM translation error','\fontsize{25} AGPC-SLAM translation error','\fontsize{25} LeGO-LOAM rotation error','\fontsize{25} AGPC-SLAM rotation error');

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