[image: 搜狗截图20190723164750.png] May I ask you a question?How do we use this Column N optional?I want to know what I can add and how?
[image: 搜狗截图20190723165129.png] I would like to make a diagram for the following example. -- You received this message because you are subscribed to the Google Groups "Google Visualization API" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/google-visualization-api/e8ce6fe0-ddd3-4ef2-a754-5f9fc26f24a4%40googlegroups.com.
