
plsdidev: Set parameters that define current device-space window 

DESCRIPTION:

    This function is used in example 31. 

SYNOPSIS:

plsdidev(mar, aspect, jx, jy)

ARGUMENTS:

    mar (PLFLT, input) :    Relative margin width. 

    aspect (PLFLT, input) :    Aspect ratio. 

    jx (PLFLT, input) :    Relative justification in x. Value must lie in
    the range -0.5 to 0.5. 

    jy (PLFLT, input) :    Relative justification in y. Value must lie in
    the range -0.5 to 0.5. 
