[英]R: suppressMessages from Rprintf in C++
I am writing an R-package with some C++ code running lengthy calculations. 我正在编写一个R-package,其中包含一些运行冗长计算的C ++代码。 Inside the C++ code, I am using Rprintf() to output information.
在C ++代码中,我使用Rprintf()来输出信息。 I tried suppressing the output from R with suppressMessages(), but this doesn't work, the messages still appear inside the R session.
我尝试使用suppressMessages()来抑制R的输出,但是这不起作用,消息仍然出现在R会话中。
I found some similar questions, where people were using printf instead of Rprintf, but I am already using Rprintf. 我发现了一些类似的问题,人们使用的是printf而不是Rprintf,但我已经在使用Rprintf了。 I also tried R_ShowMessage(), which is also immediately displayed and not suppressed by suppressMessages().
我也尝试过R_ShowMessage(),它也会立即显示而不会被suppressMessages()抑制。
Here is some example C++ code: 这是一些示例C ++代码:
#include <R.h>
extern "C" {
void R_testprint()
{
Rprintf("Try to suppress me!\n");
R_ShowMessage("Try to suppress me, too!");
}
}
And the function that calls this code: 以及调用此代码的函数:
test.print <- function(string) {
res <- .C("R_testprint")
}
Now, the following R code will not suppress the output: 现在,以下R代码不会抑制输出:
> suppressMessages( test.print() )
Try to suppress me!
Try to suppress me, too!
I am using R version 3.1.0 我使用的是R版本3.1.0
I appreciate any help! 我感谢任何帮助!
Use capture.output
in place of suppressMessages
: 使用
capture.output
代替suppressMessages
:
b <- capture.output( test.print() )
Then the output is stored in character vector b
instead of being printed. 然后输出存储在字符向量
b
而不是打印。
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