Now has a set of data is a sensor to detect the change of light intensity of voltage value, the range is 0 to 10 v, the change of light intensity is through the liquid concentration and absorbance to trigger, the more it grows liquid suction light, resulting in voltage decreases, are now collected voltage from 10 v ~ 0 trend changes, including concentration, such as light intensity is from big to small change trend, after we collected a large amount of data, numerical is divided into three intervals (31648, 31640, 31652) (2000, 1666, 520) (136, 144, 136, 144), the first interval is no liquid through the pipe inspection situation, can be ignored but the data value most, in the middle of the appear less range is not very regular, I wrote above is just an example of the overall scope ranging from $10000 to several hundred, the last one is the minimum number of little more than 136, 144 small value, so now I how such a numerical analysis to achieve the overall trend analysis, the final group should be the highest liquid concentration, but because we use the liquid will become weak as time slowly, so the back of the numerical value is gradually reduce the number of occurrences of, does anyone made similar analysis? Main is don't know with what method to analysis

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