我有一个地区在 2017 年的用电量数据。所以我必须矩阵 1x1,一个是月份,另一个是消耗量。我想用这个命令forecast
来预测2018年第一个月的消耗,但是看了MATLAB帮助页面上的例子我也不知道怎么做。
例子:
data = {1166974.25000000, 1132479.36000000, 1137173.86000000, 1145853.58000000, 1118875.72000000, 1071456.85000000 ,1047171.87000000, 1071179.65000000 ,1077986.32000000 ,1112111.10000000, 1149668.47000000 ,1161649.19000000, 1175576.25000000 ,1126753.31000000 ,1204843.11000000 ,1183946.03000000, 1153080.36000000, 1120182.07000000, 1104726.03000000 ,1108110.02000000 ,1137729.28000000 ,1189699.45000000, 1252975.55000000, 1218118.20000000 ,1259580 ,1208193 ,1194430, 1244458, 1218867, 1205705 ,1177362, 1185584, 1164758, 1226991 ,1286044 ,1305312, 1360681.70000000 ,1332020 ,1306497.90000000 ,1299819.10000000 ,1316167.70000000 ,1246959.40000000 ,1256700.20000000 ,1266490.60000000, 1275642.90000000, 1358839.80000000, 1361440.10000000, 1398059.40000000};
data = [data{:}];
sys = ar(data,4)
K = 49;
p = forecast(sys,data,K);
plot(data,'b',p,'r'), legend('measured','forecasted')
为什么这不起作用?