How to replace missing values with the last given Value

Carlito

Hello,

i have a Database with the following scheme:

+-----------+----------------+
| Field | Type |
+-----------+----------------+
| object | varchar(50) |
| attribute | int(11) |
| value | float |
| date | datetime |
+-----------+----------------+

Object = manufacturing plant

attribute = Sensor name

Value = sensor value

日期=时间戳(datetime)

The Idea is to only save an attribute, when the value hase changed (triggered by change)...

In Rapidminder i am able to transform the scheme back to the traditional scheme, where every attribute/Sensor has a collumn. Only problem i have, are the missing values. If there are no values it means the haven`t changed, so i`d like to replace the missing values with the last given value. Is there a way to accomplish this ?

If it is not clear what exacty my problem is, i can try to be more precise in explaining it.

Thank you for your reply/ help

yyhuang

Hi@Carlito,
You can use "replace missing values (series)" operator here with previous non-missing value.



Best,
YY

Carlito

Thanks, thats the solution to my problem. I was just looking at Cleansing->Missing->Replace Missing Values...