近思录 2019-11-11

M-x Chris-An-Emacser at 
近思录 2019-11-11的配图
🥺11111234567891020090.520109.362011522012191201335020145712015912201612072017168220182135123456789101112131415close;[years sales] = textread("11.txt", "%d%f");plot(years, sales, '*g');hold on;pred = polyfit(years, sales, 2)pred_years = [2019:2030]; pred_sales = polyval(pred, pred_years)plot(pred_ye……