NAME

Log - Take the log of data


SYNOPSIS

<in.H Log [range=3 centered=2] > out.H


INPUT PARAMETERS

range -real
      defines the smallest allowed value.
      Defining max to be the maximum of the logs (best
      signal), output values (bad signal) below (max-range)
      are set to (max-range). Often you might choose range
      to be a small integer, for example, range=3 means
      each input handled as max(input, biggest/1000).
centered -integer
        defines method of shifting mean of log.
        0-The max is subtracted so all logs are negative.
        label2='log base 10' is putched
        1- The average of max and (max-range) is subtracted.
        (effectively scaling the original data)
        pclip=100 is putched.
        2-The average value of all the logs is subtracted.
        range=2*(max-avg) is putched.
maxsize - integer
      [10] Maximum memory to use in Megabytes


DESCRIPTION

Base ten logarithm of absolute values.


SEE ALSO

the Math manpage


CATEGORY

util/vector