For complete flexibility, in Unix-like systems with a popen function, you can pre-process the file with text processing utilities before it is passed into the plot command.

为了获得更完全的灵活性，在具有popen函数的unix类系统中，在将文件传送给plot命令之前，可以使用文本处理实用程序对文件进行预处理。

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A funnel plot is a useful tool to assess bias in systematic review. The methods of control the bias involved in pre-registering the clinical trials, publish...

偏倚评估的方法常用漏斗图，控制方法包括预先注册临床试验、发布研究信息、系统评价时全面收集所有发表和未发表的临床试验。

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In the two weeks since the attack, which killed four Americans including the U.S. ambassador to Libya, U.S. officials have gone from saying there was no evidence of a pre-existing plot to naming AQIM.

WSJ: U.S. Ties Libya Attack to 'Powder Keg' in Mali