R Markdown message=FALSE 仍然发出警告

R Markdown message=FALSE still spits out warnings

我的R Markdown chunk header如下:

```{r fluid_flowrate, echo=FALSE, message=FALSE, fig.height = 4, fig.width = 10}
# followed by my ggplot2 code
```

然而我编织到 HTML 我得到了正确的情节,伴随着这个警告,打印了两次:

## Warning: Removed 1 rows containing missing values (geom_point).
## Warning: Removed 1 rows containing missing values (geom_point).

我以为 message=FALSE 强制警告消失了。他们为什么出现?

如果将以下内容添加到块选项

warning=FALSE

prevents warnings that are generated by code from appearing in the finished