基于beiwei VG200存储数据的可视化处理【MATLAB】

作者：PEZHANG

时间：2023.3.21

数据载体：txt文本（beiwei VG200，UTF-8编码）

数据可视化软件：MATLAB 2021a（Windows version）

针对北微传感器导出的txt文本数据，写了数据可视化代码，供参考。上位机可以导出实时三轴和实时九轴的数据，数据特点如下图所示。

适用于实时三轴数据的源代码及处理结果图

此部分的代码延续了之前的MATLAB制图风格。

源代码

clear;clc;
close allfilename = 'Bewis_0002.txt';
delimiterIn = ' ';
headerlinesIn = 0;
A = importdata(filename,delimiterIn,headerlinesIn);% generate x data
Ts = 0.06;
[m,n] = size(A.data(:,1));
t = (1:m)*Ts;% figure
% plot(t,A.data(:,1),'Displayname','pitch theta')linewidth = 1;
wordsize = 12;% figure('Color','white')
figure
set(gcf,'unit','centimeters','position',[20 10 15 7])
plot(t,A.data(:,1),'Displayname','pitch theta')
set(gcf,'unit','centimeters','position',[20 10 15 7])
xlabel('Time (s)','FontSize',wordsize);
ylabel('Theta (°)','FontSize',wordsize);
ax = gca;
ax.YGrid = 'on';
set(gcf,'color','w')
legend
print('-dpng','-r600','x角度')figure
set(gcf,'unit','centimeters','position',[20 10 15 7])
plot(t,A.data(:,2),'Displayname','roll theta')
set(gcf,'unit','centimeters','position',[20 10 15 7])
xlabel('Time (s)','FontSize',wordsize);
ylabel('Theta (°)','FontSize',wordsize);
set(gcf,'color','w')
ax = gca;
ax.YGrid = 'on';
legend
% print('-painters','-djpeg','-r300','角度')
print('-dpng','-r600','y角度')
% print('-painters','-dpdf','角度')

运行结果

在此文代码探索过程中，对MATLAB制图代码的风格做了调整，在改进代码中，全部以句柄的形式对图片的格式进行控制，这一点增强了代码的普适性和一致性，在前文的代码中，是可以看出，句柄函数和非句柄函数是共存的。

改进代码

源代码

clear;clc;
close allfilename = 'Bewis_0002.txt';
delimiterIn = ' ';
headerlinesIn = 0;
A = importdata(filename,delimiterIn,headerlinesIn);% generate x data
Ts = 0.06;
[m,n] = size(A.data(:,1));
t = (1:m)*Ts;% figure('Color','white')
% set(gcf,'color','w')% tiledlayout(2,1)
tiledlayout(2,1,'TileSpacing','compact')
h = gcf;
h.Color = 'w';
h.Units = 'centimeters';
h.Position = [25 10 15 11];
% h.position = [20 10 15 7];ax1 = nexttile;
plot(ax1,t,A.data(:,1),'Displayname','pitch theta')
% set the style of ax1
ax1.FontName = 'times new roman';
ax1.FontSize = 12;
ax1.YLabel.String = 'Theta (°)';
% ax1.LabelFontSizeMultiplier = 0.9;
% legend('FontSize',12)
legend
% legend(ax1,{'Line 1'})
% ax1.Legend.TextColor = 'red';
ax1.YGrid = 'on';
ax1.GridLineStyle = '--';ax2 = nexttile;
plot(ax2,t,A.data(:,2),'Displayname','roll theta')% set the style of ax2
ax2.FontName = 'times new roman';
ax2.FontSize = 12;
% yline(0,'--')
ax2.YGrid = 'on';
ax2.GridLineStyle = '--';
ax2.XLabel.String = 'Time (s)';
ax2.YLabel.String = 'Theta (°)';
% legend(ax2,{'Line 1'})
% ax2.Legend
legend% export figure
% print('-djpeg','-r300','角度')
print('-dpng','-r600','角度')
% print('-painters','-dpdf','角度')
% print('-painters','-dmeta','角度')

运行结果图

适用于实时九轴数据的源代码及处理结果图

源代码

clear;clc;
close alldata = importdata('Bewis_Record_nine00.txt');
[m_data,n_data] = size(data);b = 1; 
theta = [ ];
for i = 1:m_data
a = mod(i,4);
if a == 0   %  0 equal theta, 1 equal magnetic, 2 equal acceleration, 3 equal angular velocitytheta = [theta data(i,1)];
end
b = b+1;
end
theta = theta.';%ref：https://www.bilibili.com/video/BV1464y1S7hc
fileID = fopen('beiwei001.txt','w+');
for i = 1:length(theta)
fprintf(fileID,'%s\r\n',theta{i,1});
end
fclose(fileID);filename = 'beiwei001.txt';
delimiterIn = ' ';
headerlinesIn = 0;
A = importdata(filename,delimiterIn,headerlinesIn);% generate x data
Ts = 0.06;
[m,n] = size(A.data(:,1));
t = (1:m)*Ts;% figure('Color','white')
% set(gcf,'color','w')% tiledlayout(2,1)
figure
tiledlayout(2,1,'TileSpacing','compact')
h = gcf;
h.Color = 'w';
h.Units = 'centimeters';
h.Position = [25 10 15 11];
% h.position = [20 10 15 7];ax1 = nexttile;
plot(ax1,t,A.data(:,1),'Displayname','pitch theta')
% set the style of ax1
ax1.FontName = 'times new roman';
ax1.FontSize = 12;
ax1.YLabel.String = 'Theta (°)';
% ax1.LabelFontSizeMultiplier = 0.9;
% legend('FontSize',12)
legend
% legend(ax1,{'Line 1'})
% ax1.Legend.TextColor = 'red';
ax1.YGrid = 'on';
ax1.GridLineStyle = '--';ax2 = nexttile;
plot(ax2,t,A.data(:,2),'Displayname','roll theta')% set the style of ax2
ax2.FontName = 'times new roman';
ax2.FontSize = 12;
% yline(0,'--')
ax2.YGrid = 'on';
ax2.GridLineStyle = '--';
ax2.XLabel.String = 'Time (s)';
ax2.YLabel.String = 'Theta (°)';
% legend(ax2,{'Line 1'})
% ax2.Legend
legend% export figure
% print('-djpeg','-r300','multi-variable-角度')
print('-dpng','-r600','multi-variable-角度')
% print('-painters','-dpdf','multi-variable-角度')
% print('-painters','-dmeta','multi-variable-角度')

运行结果图

官方文档对图片格式中字体大小的解释

参考资料

【1】https://ww2.mathworks.cn/help/matlab/ref/tiledlayout.html

【2】https://ww2.mathworks.cn/help/matlab/ref/matlab.graphics.layout.tiledchartlayout-properties.html

【3】https://ww2.mathworks.cn/help/matlab/ref/legend.html

【4】https://ww2.mathworks.cn/help/matlab/ref/importdata.html

【5】https://ww2.mathworks.cn/help/matlab/ref/matlab.graphics.axis.axes-properties_zh_CN.html

【6】https://www.bilibili.com/video/BV1464y1S7hc