When I type octave:7> t = 0:0.1:6.3; octave:8> plot (t,cos(t),"-;cos(t);",t,sin(t),"+3;sin(t);") Octave respond sh: line 1: gnuplot: command not found warning: in /usr/share/octave/2.1.73/m/plot/__pltopt__.m near line 121, column 7: warning: connection to external plotter (pid = 12456) lost -- warning: please try your plot command(s) again warning: broken pipe -- some output may be lost sh: line 1: gnuplot: command not found sh: line 1: gnuplot: command not found warning: broken pipe -- some output may be lost
or
octave:3> t = 0:0.1:6.3; octave:4> plot(cos(t)) sh: line 1: gnuplot: command not found warning: broken pipe -- some output may be lost sh: line 1: gnuplot: command not found warning: broken pipe -- some output may be lost sh: line 1: gnuplot: command not found sh: line 1: gnuplot: command not found warning: broken pipe -- some
output may be lost