如何在图形表里显示 y=4x 这条直线？

[林哥]

本人刚学labview，是菜鸟一只，希望各路高手能出手帮帮小弟解决这个难题。

题目要求：出啦上述要求外，x为当前系统时间。谢啦

[RavensFan]

You will be more likely to get a response if you post in English on the LabVIEW board, or post the question in your language on the foreign language board instead.

[Mathan]

His English post is here

[My NI · Accepted solution]

您好，

可以用Programming => Waveform => Build Waveform来生成您需要的曲线。

参数1: t0 is the start time of the waveform. 可以用Programming => Timing => Get Date/Time In Seconds 函数为其赋值(current time).

参数2: dt is the time interval in seconds between data points in the waveform.  
参数3: Y  contains the data values of a waveform.  

但是您将如何定义y轴的值？是current time in seconds * 4? 还是 elapsed time in seconds *4? 

如果y值是前者则问题会比较复杂，因为需要一个基准时间参照来做比较。我贴一个简单例子，希望可以帮上忙。