在R和knitr中，我可以禁止显示readOGR消息吗? [英] In R and knitr, can I suppress the message of readOGR?

问题描述

我正在使用R& knitr，将输出发送到pdf.

I'm building small report using R & knitr, sending the output to pdf.

我在分析中使用了多个形状文件，每当使用rgdal包的readOGR函数时，我都会获取有关所读取内容的信息，例如:

I'm using several shape files in my analysis and whenever I use readOGR function of rgdal package I get information on what is being read, for instance:

OGR data source with driver: ESRI Shapefile 
Source: "__PATH_HERE__", layer: "__NAME__OF__LAYER__HERE__"
with 148 features and 5 fields
Feature type: wkbPolygon with 2 dimensions

通常，拥有它是很有用的..但不幸的是，它也可以打印在我的pdf输出中.

Normally, it's useful thing to have.. but unfortunately it also prints out in my pdf output.

我尝试将knitr的块选项设置为echo=FALSE, message=FALSE，但不幸的是，它没有帮助.

I tried setting knitr's chunk options to echo=FALSE, message=FALSE but unfortunately it did't help.

有什么更好的解决方案吗?

Any better solution to that?

推荐答案

您是否尝试过在readOGR函数本身中设置verbose = FALSE?

Have you tried setting verbose = FALSE in the readOGR function itself?

例如

> dsn <- system.file("vectors", package = "rgdal")[1]
> cities <- readOGR(dsn=dsn, layer="cities")
OGR data source with driver: ESRI Shapefile 
Source: "C:/Users/sohanlon/Dropbox/R/R64_Win_Libs/rgdal/vectors", layer: "cities"
with 606 features and 4 fields
Feature type: wkbPoint with 2 dimensions
# Set verbose = FALSE
> cities <- readOGR(dsn=dsn, layer="cities" , verbose = FALSE)

相关的编织块可能是:

```{r, echo=FALSE, message=FALSE}
library(rgdal)
dsn <- system.file("vectors", package = "rgdal")[1]
cities <- readOGR(dsn=dsn, layer="cities", verbose=FALSE)
```

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