in reply to how to printf a matrix like this

The explanation of how to use printf formatting is in the help for sprintf. (the printf help really should point to this too).

To fix your problem you need to set a minimum width, try something like this :-

printf "%6.1f",$var;

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Re^2: how to printf a matrix like this
by kcott (Archbishop) on Feb 12, 2014 at 09:22 UTC
    "The explanation of how to use printf formatting is in the help for sprintf. (the printf help really should point to this too)." [my emphasis]

    The printf documentation does point to this. It starts with:

    "Equivalent to print FILEHANDLEsprintf(FORMAT, LIST), ..."

    [FWIW, madM has already been provided with that information (in Re: printf matrix) as well as example sprintf usage in a number of places.]

    -- Ken

Re^2: how to printf a matrix like this
by madM (Beadle) on Feb 11, 2014 at 12:12 UTC
    thakyou! that really helped :)