How to find compiled function source code in R package?

Question

For example, I am looking into a R function PTdensity.R source code in a package called DPpackage, where I found the author called a fortran function ptdensityu :

 foo <- .Fortran("ptdensityu", ...

The thing is how to find source code for ptdensityu subroutine. It may contains in a certain fortran file in /src/ directory, but how do I know which file is it. (Actually I found it by manually check each file under /src/ and found it is in the /src/PTudensity.f.)

Quick link for the package : link

PS: I used to use this link to search source code, but somehow it does not work any more.

Spacedman · Accepted Answer · 2012-11-02 08:44:15Z

2

On a linux box, you use the grep command. In emacs, you build a tags file. In other editors there's probably similar functions. In Windows, can't you right click on a folder, hit Search... and fill in the 'A word or phrase in the file" box. Or install cygwin and use the grep command.

Amazes me that people are using computers without basic skills such as finding a string in a file...

answered Nov 2, 2012 at 8:44

Spacedman

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1 Comment

liuminzhao Over a year ago

Thank you. It is quite easy, powerful and useful with grep.

Abdul Rahman · Accepted Answer · 2012-11-02 08:14:36Z

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Have you untarred this...............?

(It was the first subroutine in PTudensity.f)

edited Nov 2, 2012 at 8:14

Abdul Rahman

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answered Nov 2, 2012 at 7:40

IRTFM

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3 Comments

liuminzhao Over a year ago

Yes, I untared it. But the thing is how can you know it's in that file. There might be hundreds of fortran files in /src .

IRTFM Over a year ago

I saw the PTudensity.f file in the directory and opened it in a text editor. There it was. It didn't seem that difficult. For more deeply buried items you should be able to use whatever operating system utilities you like to search within the /src/ directory. Spacedman gives you Linux and Windoze examples. On a Mac I suspect that the Finder search facility uses rep "under the hood".

liuminzhao Over a year ago

Thanks. I am trying that. I just blamed myself how I missed the basic idea of 'finding' something. Thanks for the idea.

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