computing the standard deviation of pixels above zero

You probably should add a "-o" option here, too, unless you always use
images fresh from rpict (no further pfilt treatment).



On Mon, Jun 14, 2010 at 10:58 PM, <[email protected]> wrote:

# -h -H do not print header or resolution string
# -pG print only the primary GREEN
# -df Output [binary 32-bit float values]
alias toflt 'pvalue -h -H -pG -df \!*'