From the perlform manpage:
Picture fields that begin with ^ rather than @ are treated
specially. With a # field, the field is blanked out if
the value is undefined. For other field types, the caret
enables a kind of fill mode.
So change your @#### to ^####, and make sure the values you want to suppress are undefined.
The second problem is that using an undefined value when warnings are enabled will generate several warning messages. I suggest disabling warnings within the format, like this:
{ no warnings;
format STDOUT =
@<<<<<<<<<<<<< ^#### @#####.##
$output[$i], $output[$i+1], $output[$i+2]/1024
.
}
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Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
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<u> <ul>
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Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
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Want more info? How to link
or How to display code and escape characters
are good places to start.
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