I want to know the way of calculation sampled data value. Is it some kind of averarge ? What is exact way to calcluted these value. Below simple example. I will be glad if you show me the calclutaion on these particular data.

I want to know the way of calculation sampled data value. Is it some kind of averarge ? What is exact way to calcluted these value. Below simple example. I will be glad if you show me the calclutaion on these particular data.

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As Roger mentions, it is linear interpolation.

Take your two values @ (Time1) 00:15 = (Value1) 47.0466 and (Time2) 00:25 = (Value2) 45.83928 where you want to interpolate for (Interval1) 00:20.

Parameter = (Interval1 - Time1) / (Time2 - Time1)

Parameter = 0.003472 / 0.006944 = 0.5Result = Value1 + Parameter * (Value2 - Value1)

Result = 47.0466 + 0.5 * (45.83928 - 47.0466) =**46.44294**

The sampled data is a linear interpolation between the previous and next values.