Informatică

Subiectul I

Ex. 1

octave-3.6.4.exe:2> k=32;

octave-3.6.4.exe:3> x=1900:10:2000;

octave-3.6.4.exe:4> y=[75.995 91.972 105.711 123.203 131.669 150.697 179.323 203.212 226.505 256.505 281.422];

octave-3.6.4.exe:5> y=y/k;

octave-3.6.4.exe:6> p=polyfit(x,y,3)

p =6.5444e-008 -7.1254e-005 -4.0471e-001 5.7974e+002

Ex. 2

octave-3.6.4.exe:7> val=polyout(p,"x")

val = 6.5444e-008*x^3 - 7.1254e-005*x^2 - 0.40471*x^1 + 579.74

octave-3.6.4.exe:8> val = 6.5444e-008*x.^3 - 7.1254e-005*x.^2 - 0.40471*x.^1 + 579.74

val =

Columns 1 through 8:

2.4445 2.8075 3.2314 3.7163 4.2628 4.8712 5.5420 6.2754

Columns 9 through 11:

7.0720 7.9321 8.8560