Thread Subject:

missing data check

Hi all,

Are there any possibilities to process the missing data check based on the time series?!

Here is the data look like as below. In this case, some data points are missing from time 600 to 2300. How to list the date and time at the missing data point? Thanks.

2007 1 30 4.0033 237.58
2007 1 100 4.0282 232.89
2007 1 130 5.4415 257.04999
2007 1 200 5.0331 251.24001
2007 1 400 4.4454 244.00999
2007 1 430 4.2275 233.69
2007 1 500 3.2998 204.71001
2007 1 530 2.6559 208.42
2007 1 2330 3.7164 238.63
2007 1 2400 4.0033 237.61
2007 2 30 4.0033 237.58
2007 2 100 4.0282 232.89
:
:

"Kuo-Hsien" <mchangks@hotmail.com> wrote in message <gqrn1a$boa$1@fred.mathworks.com>...
> Hi all,
>
> Are there any possibilities to process the missing data check based on the time series?!
>
> Here is the data look like as below. In this case, some data points are missing from time 600 to 2300. How to list the date and time at the missing data point? Thanks.
>
> 2007 1 30 4.0033 237.58
> 2007 1 100 4.0282 232.89
> 2007 1 130 5.4415 257.04999
> 2007 1 200 5.0331 251.24001
> 2007 1 400 4.4454 244.00999
> 2007 1 430 4.2275 233.69
> 2007 1 500 3.2998 204.71001
> 2007 1 530 2.6559 208.42
> 2007 1 2330 3.7164 238.63
> 2007 1 2400 4.0033 237.61
> 2007 2 30 4.0033 237.58
> 2007 2 100 4.0282 232.89
> :
> :
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Kuo-Hsien:
Scan the data into an array. Then use diff() on the third column looking for any differences that are greater than largest gap you are willing to accept.
-ImageAnalyst