Recording and plotting multiple channels

Question

Mathew 2014-12-10

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/166167-recording-and-plotting-multiple-channels

hey, if you could help me im new to matlab and would like someone to check my code. I want to record two voltage signals from our NI DAB simultaneously using two different channels. so i wrote this code. but im not sure about plotting and saving the date. i want to plot all the values in chan1 over the respective values in chan0. and then i want it to be saved in a matrix with 2 columns represented by chan0 and chan1. could you just check through my code and see if ive made any errors.

clear                                               % Clears the workplace
close('all','hidden')                               % Closes all hidden and visible windows and stops all matlab processes
AI=analoginput('nidaq','Dev1');                     % Generates annalog input object AI. This establishes connection between matlab and the DAB
addchannel(AI,0:1,{'chan0','chan1'});               % Connects angle sensor (chan1) and reciever (chan2)
AI.SampleRate=100;                                  % Set sample rate on DAB                             
N=input  ('Number of samples N:      ');            % Set number of voltage values to be read
set(AI,'SamplesPerTrigger',N);                      % Set N samples per trigger on the DAB
start(AI)                                           % Start measurement
[UG,t]=getdata(AI);                                 % Read voltage and corresponding time values from PC memory, and store data into the variables U and T
save('directional.dat','UG','-ascii');              % Save the file 
plot(UG(:,'chan0'),UG(:,'chan1'))                   % Plots angle sensor signal over reciever signal
delete(AI);                                         % Delete input object
clear AI;                                           % Clear AI from workspace