Table 2 List of abbreviations
From: GMA: Gap Imputing Algorithm for time series missing values
Symbol | Definition |
|---|---|
GMA | The Gap Imputing Algorithm |
MAR | Missing at random |
MCAR | Missing completely at random |
MNAR | Missing not at random |
S | The total time series |
Sf | The subsequence with no missing values |
Sm | The subsequence with missing values |
P | The number of readings in the periodic sequence for the longest component within the time series |
W | Missing gaps |
R | The right pattern for the missing gap |
L | The left pattern for the missing gap |
N | The number of readings in the missing gap |
wl | the most similarity pattern to L in Sf |
wr | the most similarity pattern to R in Sf |
b | the start index for wl |
e | the end index for wr |
sr | Correlation value between R and wr |
sl | Correlation value between L and wl |
RMSE | mean squared error |
MAE | mean absolute error |
FSM | Full Subsequence Matching algorithm |