def t_lumi(self,num_frame,xax):
pyl.figure(num_frame)<EOL>if xax == '<STR_LIT:time>':<EOL><INDENT>xaxisarray = self.get('<STR_LIT>')<EOL><DEDENT>elif xax == '<STR_LIT>':<EOL><INDENT>xaxisarray = self.get('<STR_LIT>')<EOL><DEDENT>else:<EOL><INDENT>print('<STR_LIT>')<EOL><DEDENT>logLH   = self.get('<STR_LIT>')<EOL>logLHe  = self.get('<STR_LIT>')<EOL>pyl.plot(xaxisarray,logLH,label='<STR_LIT>')<EOL>pyl.plot(xaxisarray,logLHe,label='<STR_LIT>')<EOL>pyl.ylabel('<STR_LIT>')<EOL>pyl.legend(loc=<NUM_LIT:2>)<EOL>if xax == '<STR_LIT:time>':<EOL><INDENT>pyl.xlabel('<STR_LIT>')<EOL><DEDENT>elif xax == '<STR_LIT>':<EOL><INDENT>pyl.xlabel('<STR_LIT>')<EOL><DEDENT>
Luminosity evolution as a function of time or model.

Parameters
----------
num_frame : integer
    Number of frame to plot this plot into.
xax : string
    Either model or time to indicate what is to be used on the
    x-axis