How can I get 3D continuous plot of real time data ?

Question

Aradhya Anil Tare 2020-1-8

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/499499-how-can-i-get-3d-continuous-plot-of-real-time-data

评论： Aradhya Anil Tare 2020-1-11

Hey, I'm working on MPU 9250. I want to plot real time data of MPU in 3D, I'm able to plot real data in 3D, the plot contained all the data from first reading to the last but I want to plot the first reading then the second reading and so on. I'm not able to plot the data. Please help me.

Thank you in advance.

Regards,

Aradhya Tare

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Geoff Hayes 2020-1-8

Aradhya - how are you plotting the data from the first reading? How do you then plot data from the second reading? Please include a sample of your code. And is the "first reading" a single point or is it multiple points?

Aradhya Anil Tare 2020-1-9

编辑：Geoff Hayes 2020-1-10

%%for reading the data the data is already stored in the folder 
accel_tab = readtable('angular_acceleration.xlsx') ; 
gyro_tab = readtable('angular_velocity.xlsx') ;
mag_tab = readtable('magnetic_field.xlsx') ;
%% Conversion from table to array
accel = table2array(accel_tab); 
gyro = table2array(gyro_tab); 
mag = table2array(mag_tab);
%% for plotting
%x-accel contains all the x coordinates of acceleration
for i = 1:1000-1 
    plot3( x_accel(i), y_accel(i), z_accel(i)) 
end

is the code is right ?

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Answer 1

Geoff Hayes 2020-1-10

5
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/499499-how-can-i-get-3d-continuous-plot-of-real-time-data#answer_409607

编辑：Geoff Hayes 2020-1-10

Aradhya - everytime you call plot3 you are creating a new plot (graphics) object and the previous one is deleted. Perhaps that is why you are not seeing all of the data being plotted (if I understand your question correctly). Rather than using a loop to plot the data, just do it all at once

plot3( x_accel(1:999), y_accel(1:999), z_accel(1:999))

Else if you want to plot each point (with perhaps a pause between each one), then you will want to create one plot object and update that on each iteration of your loop

hPlot = plot3(x_accel(1), y_accel(1), z_accel(1));
for k = 2:1000-1
    pause(0.5);
    xdata = [get(hPlot, 'XData') ; x_accel(k)];
    ydata = [get(hPlot, 'YData') ; y_accel(k)]; 
    zdata = [get(hPlot, 'ZData') ; z_accel(k)];
    set(hPlot, 'XData', xdata, 'YData', ydata, 'ZData', zdata);
end

I haven't tested the above, but it should work something like that.

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Geoff Hayes 2020-1-11

Sorry, Aradhya. Try removing the semi-colons:

hPlot = plot3(x_accel(1), y_accel(1), z_accel(1));
for k = 2:1000-1
    pause(0.5);
    xdata = [get(hPlot, 'XData') x_accel(k)];
    ydata = [get(hPlot, 'YData') y_accel(k)]; 
    zdata = [get(hPlot, 'ZData') z_accel(k)];
    set(hPlot, 'XData', xdata, 'YData', ydata, 'ZData', zdata);
end