"Numerical data is quantitative data, which can be explored and analyzed from the following dimen .."

Lina RaqForum 43 No.
128 View • 7 Months ago

Numerical data

Numerical data is quantitative data, which can be explored and analyzed from the following dimensions.

For example, there is a numerical variable "Age" in the Titanic data which indicating the age of the passengers.

Analyse in SPL:

	A
1	=file("D://titanic.csv").import@qtc()
2	=A1.(Age)
3	=A2.max()
4	=A2.min()
5	=A2.avg()
6	=A2.mode()
7	=A2.median()
8	=A2.median(1:4)
9	=A2.median(3:4)
10	=var@s(A2)
11	=sqrt(A9)
12	=A2.skew()
13	=A2.se()
14	8
15	=(A2.max()-A2.min())/A14
16	=A14.([(~-1)A15+A2.min(),~A15+A2.min()])
17	=A16.new(~:group,(~(1)+~(2))/2:group_median, if(#==A16.len(),count(A2.(~>=group(1)&&~<=group(2))),count(A2.(~>=group(1)&&~<group(2)))):count)
18	=canvas()
19	=A18.plot("EnumAxis","name":"x")
20	=A18.plot("NumericAxis","name":"y","location":2)
21	=A18.plot("Column","text":A17.(count),"axis1":"x","data1":A17.(string(group_median)),"axis2":"y","data2":A17.(count))
22	=A18.draw@p(800,450)
23
24	=A1.impute("Age")	[0.25,0.5,0.75]
25	=A24(1).sort()	=A25(1)
26	=A25.(#/A25.len())	=A25.m(-1)
27	=canvas()
28	=A27.plot("NumericAxis","name":"x","autoCalcValueRange":false,"maxValue":1,"scaleNum":10,"allowRegions":false)
29	=A27.plot("NumericAxis","name":"y","location":2,"autoCalcValueRange":false,"autoRangeFromZero":false,"maxValue":A25.m(-1),"minValue":A25(1))
30	=A27.plot("Line","lineColor":-16776961,"markerWeight":1,"axis1":"x","data1":A26,"axis2":"y","data2":A25)
31	for B24	=A27.plot("Line","lineStyle":2,"lineColor":-65281,"markerWeight":-1,"axis1":"x","data1":[A31,A31],"axis2":"y","data2":[B25,B26])
32	=A27.draw@p(800,400)

A2-A9 Calculate the basic statistics of the variable, maximum, minimum, mean, mode, median, quartile

A10-A13 Calculate the variance, standard deviation, skewness and standard error.

For numerical variables, you can also visualize the data, the most common being a histogram

A14-A22 Draw a histogram. Before drawing, it is necessary to determine the number of columns, and then equidistant grouping the variable. Count the number of samples falling into each group interval (column)

A14 Input the number of columns is 8.

A15 Calculate the width of each column

A16 Divide the samples into 8 groups, return the range of intervals for each group, approximately every 10 years.

A17 Calculate the median for each group and the number of passengers who fall into that group, such as the first group of 64 passengers from 0 to 10 years old.