Time series analysis using kibana timelion

Concept

First understand > A concept ： What is year-on-year and month on month ？

Year on year and month on month ：
（1） Year on year ： Compare this period with the same period .
（2） Chain ratio ： Compare this period with the previous period .
To put it simply , Year on year and month on month are used to indicate the direction and degree of development and change of something during the comparison period .

Year on year ： It usually refers to the... Of this year n Month and the... Of last year n Monthly ratio . The year-on-year growth rate is mainly to eliminate the impact of seasonal changes , It is used to explain the relative development speed achieved by comparing the development level of this period with that of the same period last year . It is often used to analyze the long-term trend of data .
Chain ratio ： It usually means continuous 2 One unit period （ Like two months in a row ） The change of the quantity in is more than . The chain comparison includes two types ： Month on month growth rate and month on month development rate . It is often used to analyze the short-term trend of data .

Comparison of two adjacent same time periods in the statistical cycle ( for example 6 The month and 7 Month comparison ,8 The month and 9 Month comparison )---- Chain ratio , The same location time period between multiple statistical cycles ( Every day at noon 12 spot )---- Year on year
What's the difference between the two ？
（1） The month on month comparison is generally used for 、 Days are seldom used for years , It is mainly to compare the degree of increase in a very short time , However, due to industry differences , Such as tourism , It will be affected by the low and peak seasons .
（2） Year on year is generally used in the next two years , In the same period of time , View the increase degree , It is usually used in the same month of two years , Rarely used on the same date in two months .

Example 1:

for example , last year 6 month , Xiao Wang lacks exercise because of the epidemic and often stays at home to eat potato chips , As a result, the weight soared to 100 kg , This year, , In order to maintain his sunny image , Start exercising , As of this year 6 month , Xiao Wang's weight fell to 80 kg . Due to the development of the company's business , Xiao Wang works overtime and stays up late every day , To 7 The weight will be left in August 60 kg . So at this point , We can say that Xiao Wang's weight fell year-on-year 40%, It's down on a month on month basis 25%. Year on year ：（100-60）/100; Chain ratio ：（80-60）/80

2021 6 month 100kg
2022 6 month 80kg
2022 7 month 60kg

(100-60)/100 Year-on-year decline in 40%,(80-60)/80 fell 25%

Example 2:
Another example is ,2020 Total per capita income 2 Ten thousand yuan ,2019 Total per capita income 1 Ten thousand yuan , It can be expressed as 2020 Annual per capita income increased year on year 1 Ten thousand yuan , although 2020 and 2019 Are two adjacent time periods of equal length , But for two statistical cycles , Not month on month . First, determine the statistical period , Comparison of two adjacent same time periods in the statistical cycle ---- Chain ratio , The same location time period between multiple statistical cycles ---- Year on year
2020 2w
2019 1w

Conclusion :
2020 Year-on-year growth 1w

After knowing the concept of year-on-year and month on month comparison, you can continue to look down

What is? Kibana Timelion?

Timelion yes Kibana Visualization tool of time series in . Time series visualization is the visualization of analyzing data in time order .Timelion It can be used to draw two-dimensional graphics , Time is plotted on x On the shaft .
What are the advantages over using only ordinary bars or line visualization ？Timelion Took a different approach . You don't need to use a visual editor to create charts , But by using timelion Specific syntax links functions together to define graphics . this sytnax Some functions not provided by classic point series charts are enabled - For example, draw data from different indexes or data sources into a chart .
timelion You can aggregate data from completely independent and completely different data sources , Blend into the same picture , Make some presentation and analysis .（kibana Generally, it only shows es One of the index Of ）

Some of the following questions are kibana Can't handle , and timelion Tolerable ：

• Look at the daily crawling volume this month and the daily crawling volume last month in a picture
• Cumulative sum of crawling quantity this month
• Compared with the crawling volume last month , The growth rate this month
• Show the stock 30 Average distribution chart
• …

Timelion expression

timelion Expression with . start , A bunch of parameters will follow in the middle .timelion Expressions support chained calls , Such as es(q=site:yd).lable(yd)

You can also draw multiple curves in a graph , To compare , Separate with commas . This blog mainly records some common methods and their parameters .