pllab: Simple routine to write labels 

DESCRIPTION:

    Routine for writing simple labels. Use plmtex for more complex labels. 

SYNOPSIS:

pllab(xlabel, ylabel, tlabel)

ARGUMENTS:

    xlabel (const char *, input) :    Label for horizontal axis. 

    ylabel (const char *, input) :    Label for vertical axis. 

    tlabel (const char *, input) :    Title of graph.