%北太天元數(shù)值計算通用軟件數(shù)據(jù)擬合預(yù)測春運人數(shù)

tp = [ 1954 0.23

1984 5

1994 10

2006 20

2012 20

2014 36

2015 28.07

2016 29.1

2017 29.78

2018 29.7

2019 29.8

2020 30.0

2021 17

2022 11.80

];

t = tp(7:end-2,1);

lnp =log10(tp(7:end-2,2));

擬合多項式 = polyfit(t,lnp, 2);

x=t(1):1:2030;

y = polyval(擬合多項式,x);

plot(x,y,'-r*')

plot(tp(7:end,1), tp(7:end,2), 'bo', x, 10.^y, '-r*')

legend('統(tǒng)計數(shù)據(jù)','擬合數(shù)據(jù)')

title("春運人數(shù)")

ylabel("人口:億")

xlabel("年")