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Sampling from Database (Making Type 1)

This page is the story how to get sensor data from the database by sampling . I call "type 1" for such data.

If there is ten years sensor data of voltage data by every 1 second. It means that there are about 300,000,000 samples.
60 seconds * 60 minutes * 24 hours * 10 ten years = 31560000.

I think that 10,000 is the good size to analyze the data by graphs. In my experience, most of data analysis is done by the analysis of 10,000 samples data.

Way to Sample

The best way is different by the purpose of the analysis. I show some examples of sampling.

NEXT Analysis of Type 1