gnuplot reports addition in a fn as an error

[<pl...@pi...>]

Hi,

yet more is in the silly errors file.  Gnuplot is will to multiply be 
1.4 but not add it !

gnuplot>  f1(x)=1.4*cos(x/15.0)
gnuplot>  f1(x)=1.4+cos(x/15.0)
                   ^
          ';' expected


In the terminal, the caret is aligned under the digit "4"


gnuplot> show version

         G N U P L O T
         Version 4.7 patchlevel 0    last modified 2012-10-16
         Build System: Linux i686




Beats me .

Peter.