当我执行以下命令时,我的“预测变量”数据集被正确填充:
library(rhdf5)
library(forecast)
library(sltl)
library(tseries)
fid <- H5Fcreate(output_file)
## TODO: compute the order p
p <- 4
# write predictors
h5createDataset(output_file, dataset="predictors", c(p, length(tsstl.remainder) - (p - 1)), storage.mode='double')
predictors <- as.matrix(tsstl.remainder)
for (i in 1:(p - 1)) {
predictors <- as.matrix(cbind(predictors, Lag(as.matrix(tsstl.remainder), i)))
}
predictors <- as.matrix(predictors[-1:-(p-1),])
head(predictors)
h5write(predictors, output_file, name="predictors")
H5Fclose(fid)
生成的(正确)输出为head(predictors)
:
[,1] [,2] [,3] [,4]
[1,] 0.3089645 6.7722063 5.1895389 5.2323261
[2,] 8.7607228 0.3089645 6.7722063 5.1895389
[3,] -0.9411553 8.7607228 0.3089645 6.7722063
[4,] -14.1390243 -0.9411553 8.7607228 0.3089645
[5,] -26.6605296 -14.1390243 -0.9411553 8.7607228
[6,] -8.1293076 -26.6605296 -14.1390243 -0.9411553
但是,当我阅读它时,结果不正确:
tsmatrix <- t(as.matrix(h5read(output_file, "predictors")))
head(tsmatrix)
错误输出:
[,1] [,2] [,3] [,4]
[1,] 0.3089645 8.760723 -0.9411553 -14.13902
[2,] -26.6605296 -8.129308 -9.8687675 31.52086
[3,] 54.2703126 43.902489 31.8164836 43.87957
[4,] 22.1260636 36.733055 54.7064107 56.35158
[5,] 36.3919851 25.193068 48.2244464 57.12196
[6,] 48.0585673 72.402673 68.3265518 80.18960
为什么我写的和我得到的不对应?我仔细检查了 hdfview HDF5 查看器也为“预测器”数据集显示了这个不正确的值。
这里有什么问题?