将15分钟数据汇总到每小时 [英] Aggregate15 minute data to hourly

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本文介绍了将15分钟数据汇总到每小时的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我有一个看起来像这样的数据框:

I have a data frame that looks like this:

     Timedate              TotalSolar_MW
20  2013-06-01 04:45:00     13.0
21  2013-06-01 05:00:00     41.7
22  2013-06-01 05:15:00     81.8
23  2013-06-01 05:30:00    153.0
24  2013-06-01 05:45:00    270.7
25  2013-06-01 06:00:00    429.3
26  2013-06-01 06:15:00    535.4

Timedate;是 POSIXlt 和 Total_Solar;是数字。从6月1日0:00到6月24日24:00的时间间隔为15分钟。

"Timedate" is POSIXlt, and "Total_Solar" is numeric. The time steps are in 15 minute intervals from June 1, 0:00 to June 24, 24:00.

现在我要汇总季度每小时数据到每小时步骤,例如2013-06-01 06:00:00 934.8MW(81.8MW + 153.0MW + 270.7MW + 429.3MW;从05:15至06:00)

Now I want to aggregate the quarter hourly data to hourly steps e.g. 2013-06-01 06:00:00 934.8MW (81.8MW + 153.0MW + 270.7MW + 429.3MW; from 05:15 to 06:00)

我尝试了以下方法:

 Sum <-aggregate(Total_Solar_Gesamt$TotalSolar_MW, 
          list(as.POSIXlt(Total_Solar_Gesamt$Timedate)$hour), FUN=sum)

但是它返回整个数据帧的每小时汇总数据,并为我提供了一个具有24行的新data.frame以及每小时的总MW。

But it returns the aggregated hourly data of the whole data frame and gives me a new data.frame with 24 rows and the summed up MW for every hour.

如何更改结构,仅从每季度25分钟减少到一个小时间隔?我尝试了for循环,但这也没有用。 子集也不适合我。

How can I change the structure, only to reduce from a quarter hourly to an hourly interval? I tried a for loop but this also didn't work. Also subset didn't work for me.

推荐答案

时间序列,建议您使用 xts 软件包进行操作,例如 hourly.apply

When working with time series, I suggest you work with xts package for this, and for example hourly.apply:

 library(xts)
 dat.xts <- xts(Total_Solar_Gesamt$TotalSolar_MW,
                as.POSIXct(otal_Solar_Gesamt$Timedate))
 hourly.apply(dat.xts,sum)

更一般使用 period.apply (等价的 lapply ),例如,每2小时汇总一次数据,您可以以下:

More general you can use period.apply which is (lapply equivalent) , for example to aggregate your data each 2 hours you can do the following:

 ends <- endpoints(zoo.data,'hours',2) 
 period.apply(dat.xts,ends ,sum)

这篇关于将15分钟数据汇总到每小时的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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