如何在Matlab中使用Timer [英] How to use Timer in Matlab

问题描述

我想使用Matlab从Yahoo获得IBM价格价格可以得到

I want use matlab to get IBM price from yahoo price can get by

quote = fetch(yahoo, 'IBM', 'Last');
px = quote.Last;

现在，我想每分钟从例如上午9:00到下午1:00检索数据.我想使用计时器对象来获取数据.

Now I want to retrieve the data every minute from, for example, 9:00 am to 1:00 pm. I would like to use timer object to get my data.

但是，我不知道如何使用它.我能得到的是

However, I cannot figure out how to use it. What I can get is

t = timer;
t.ExecutionMode = 'fixedRate';
t.Period = 60;

尤其是 timerFcn ，我不知道如何使用它.

especially the timerFcn, I don't get how to use it.

希望有人可以为此写一个例子.谢谢

Hope someone can write me an example with this. Thanks

推荐答案

需要写一个回调函数才能使用TimerFcn.

You need to write a callback function to use TimerFcn.

让它成为您的主文件，您可以在其中启动计时器:

Let this be your main file, where you initiate the timer:

tmr = timer('ExecutionMode', 'FixedRate', ...
    'Period', 60, ...
    'TimerFcn', {@timerCallback});
start(tmr);

这将是您的回调函数，它将在每次计时器计数完成时执行(例如，在您的示例中，每60秒执行一次).

Then this would be your callback function, which would execute every time the timer count is complete (i.e. every 60 seconds in your example).

function timerCallback(hObj, eventdata)
    disp('timey-wimey');
end

这篇关于如何在Matlab中使用Timer的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！