Question

我正在matlab中串行获取实时数据，但是数据是交替出现的两个参数（电压和温度）的组合。那么我该如何分离和绘制它。

Answer 1

这将是一种方法。除了分离电压和温度读数外，我还自由地组织了代码，因此它只创建了一个绘图，然后又对其进行了更新（而不是在每个新样本中生成全新的绘图）。

我还将示例阅读包打包到一个匿名函数中，而不必太重复代码。

可以从第一条tic指令获得时间戳。您不必一个个地添加每个间隔。

% Prepare the plot so you do not have to recreate it at each new sample
Time        = zeros(1,1) ;
Voltage     = zeros(1,1) ;
Temperature = zeros(1,1) ;
hvolt = plot(Time,Voltage) ; 
% only if you want to display temperature, uncomment below line
% hold on ; htemp = plot(Time,Temperature) ; hold off
ylim([3,5]);
ylabel('Voltage');
xlabel('Time');

% Define an anonymous function for reading ONE sample
readSample = @(s) str2double(char(fread(s, 5).')) ;

SampleCounter = 1 ;
StartTime     = tic ;
while 1

    % Read 2 samples (one Voltage and one Temperature)
    Voltage(SampleCounter)     = readSample(s) ;
    Temperature(SampleCounter) = readSample(s) ;
    % Readt the time
    Time(SampleCounter,1)      = toc(StartTime) ;

    % Now we acquired 2 samples (one voltage and one temperature), we can
    % refresh the display:
    set(hvolt,'XData',Time,'YData',Voltage) ;

    % only if you want to display temperature, uncomment below line
    % set(htemp,'XData',Time,'YData',Temperature) ;

    drawnow
    SampleCounter=SampleCounter+1;
end

我们如何在MATLAB中分离传入的实时数据？

1 个答案: