missInfo

missInfo package is used to detect daily meteorological station data missing information and interpolate missing values.

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Tasklist:

• Add QC_flag for filled value

Installation

You can install the released version of missInfo from github with:

devtools::install_github("kongdd/missInfo")

Example

This is a basic example which shows you how to solve a common problem:

• prcp data.frame, with dimension of [n_date, 1+n_station], and the first column is date.
• st840 data.frame, with columns at least of ‘site’, ‘lat’, ‘lon’ (degree).

library(missInfo)
## basic example code
data("prcp")
data("st840")
r <- interp_main(prcp, st840, smax = 200, verbose = FALSE)
#> [0    ] Detect missing information of original data ...
#> [1.1  ] runing na.approx interpolate ...
#> [1.2  ] Detect missing info after na.approx interpolate ...
#> [2.1.1] runing linear lm interpolate ...
#> [2.1.2] Detect missing info after first lm interpolate ...
#> [2.2.1] runing second linear lm interpolate ...
#> [2.2.2] Detect missing info after second lm interpolate ...
#> [3.1  ] History average interpolate...
#> [3.2  ] Detect missing info after hisavg interpolate ...

气象要素特征值说明 (Illustration of meteorological flags)：

• 台站海拔高度 +100000 当台站海拔高度为估测值时，在估测数据基础上加100000

• 各要素项 32766 数据缺测或无观测任务

• 气压日极值 +20000 气压极值取自定时值，在原值上加20000

• 日最小相对湿度 +300 最小相对湿度取自定时值，在原值上加300

• 风速 +1000 当风速超过仪器测量上限时，在上限数据基础上加1000

• 风向 1-17 用数字表示风向方位，17表示静风 +100 当表示风向为八风向时，在原值上加100 90X 风向出现X个时，风向数据用个数X表示 95X 风向至少出现X个时，风向数据用个数X表示

• 降水量

  flag	Description
  32700	表示降水“微量” (0.1mm)
  32XXX	XXX为*纯雾露霜*
  31XXX	XXX为雨和雪的总量
  30XXX	XXX为雪量(仅包括雨夹雪，雪暴）

• 蒸发量
  32700 表示蒸发器结冰 +1000 蒸发器中注入的水全部蒸发，在注入的水量数据基础上加1000

• 0cm地温 +10000 实际温度（零上）超仪器上限刻度，在上限数据基础上加10000 -10000 实际温度（零下）超仪器下限刻度，在下限数据基础上减10000

• Quality Control (QC) flags

  flag	Description
  0	正确
  1	可疑
  2	错误
  4	定制数据
  7	无观测任务
  8	缺测
  9	未进行质量控制

References

[1] Dongdong Kong, R package: missing information detect and interpolate, missInfo version 0.1.1, https://github.com/kongdd/missInfo

Acknowledgements

Keep in mind that this repository is released under a GPL-3 license, which permits commercial use but requires that the source code (of derivatives) is always open even if hosted as a web service.