Frequency and frequency statistical analysis method

Frequency and frequency statistical analysis methods include: bar statistics and sector statistics.

Bar chart is a statistical chart that represents a certain quantity with unit length, draws straight lines with different lengths according to the quantity, and then arranges these straight lines in a certain order. It is easy to see various numbers from the bar chart. Bar charts are generally called bar charts, also called bar charts or bar charts.

Sector statistics chart uses the whole circle (unit "1") to represent the total, and the size of each sector in the circle indicates the percentage of each part in the total. The sum of the percentages of all parts in the fan statistics chart is "1". But a pie chart is not a pie chart.

The relationship between the number of each part and the total number can be clearly expressed through the fan-shaped statistical chart. Different from the broken line statistical chart, it can't reflect the quantitative change trend; Unlike bar charts, it is not easy to see figures of various quantities.

Frequency and frequency:

Frequency (mbth: frequency, also called frequency) refers to the number of times that a number (flag value) representing a certain characteristic appears in the variable value. The representation of numbers can be in the form of tables or charts. The frequencies arranged in turn according to groups constitute a frequency sequence, which is used to illustrate the strength of each group of logo values on all logo values. The sum of the frequencies of each group is equal to all units of the group.

Frequency is a quantity that describes the frequency of periodic motion, indicating the number of times to complete periodic changes in unit time. Common symbols are F or V, and the unit is Hz.

Frequency can be divided into power frequency, audio frequency, tidal frequency, angular frequency, statistical frequency and so on. , has applications in mechanics, acoustics, electromagnetism, optics and other fields. Every object has a frequency independent of amplitude, which is determined by the nature of the object itself and is called the natural frequency.