Beefy Boxes and Bandwidth Generously Provided by pair Networks
No such thing as a small change

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
For the general case of an n x m matrix:
(note n & m evenly divisible by i & j respectively)
$rows = n; $cols = m; $rowstep = i; $colstep = j; $num_row_subs = $rows/$rowstep; $num_col_subs = $cols/$colstep; for $r (0 .. $num_row_subs-1) { for $c (0 .. $num_col_subs-1) { for $sub_row (0 .. $rowstep-1) { for $sub_col (0 .. $colstep-1) { $row = $r*$rowstep+$sub_row; $col = $c*$colstep+$sub_col; print "[$r*$rowstep+$sub_row = $row][$c*$colstep+$sub_ +col = $col]<br>\n"; } } } }
Switching order of for-loops changes manner of walking through sub-matrices.

In reply to Re: Iterating over Blocks of 2-Dim Array by punchcard_don
in thread Iterating over Blocks of 2-Dim Array by Kozz

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?

    What's my password?
    Create A New User
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others contemplating the Monastery: (5)
    As of 2018-04-19 21:45 GMT
    Find Nodes?
      Voting Booth?