Re: printf scientific notation?

Thank Richard. So far, I just punted. My site runs on a dedicated box and doesn't have to service a lot of users so I just wrote a one line C program to print a single value using a specified format (default is %.4e) and use exec() to call it. printe [format] value Here's how I encapsulated it: function printe( $x ) {

    $lines = array();
    exec( "/usr/local/bin/printe \"".$x."\"", $lines );
    return $lines[0];
}          

and an example of how I call the function:

    fputs( $fp, sprintf( "%8.2f %s %s\n", $this->O_a_time[$i],
        printe($this->O_a_height[$i]),
        printe($this->O_a_cooling[$i]) ) );

It works well enough for now. Eventually I hope to have time to play and then I'll come back and figure out a real patch for PHP's printf to support %e directly. Bill At 12:09 AM -0500 10/5/01, Richard Lynch wrote:

You could roll your own... % and (int) / and round() are all you need. ----- Original Message ----- From: Bill Rausch <bill@numerical.com> Subject: printf scientific notation? Can PHP print floating point numbers using scientific notation?

(like 1.32e+5) sscanf reads them ok using %f, but I'd like to print them with %e or %g and the printf documentation doesn't mention them.

I've tried %e anyway and it fails to print the exponent part.

-- Bill Rausch, Software Development, Unix, Mac, Windows Numerical Applications, Inc. 509-943-0861 bill@numerical.com