Create the following data frame called “data”. With respect to variables “x1”, “x3” and “x4”, please use sequences. Finally, check the data structure and data types of “data”. Replace the value of variable “x4” by 2018 if “x5” equals 1 OR if “x2” is equal or less 150. Rename the variables of “data2” the following: x1 = “age”, x2 = “income”, x4 = “year”, x6 = “income_bracket”. Sort “data2” by multiple columns. Sort first by “income” and then by “age”, both variables in descending order. Plot the histogram of each column and add bell curve to the histogram

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Create the following data frame called “data”. With respect to variables “x1”, “x3” and “x4”, please use sequences. Finally, check the data structure and data types of “data”.

Replace the value of variable “x4” by 2018 if “x5” equals 1 OR if “x2” is equal or less 150.

Rename the variables of “data2” the following: x1 = “age”, x2 = “income”, x4 = “year”, x6 = “income_bracket”.

Sort “data2” by multiple columns. Sort first by “income” and then by “age”, both variables in descending order.

Plot the histogram of each column and add bell curve to the histogram 

1
2
3
4
5
6
7
8
9
10
x1
25
27
29
31
33
35
37
39
41
43
x2
«
x3
278 A
113 B
294 C
217 D
398 E
328 F
343 G
113 H
252 I
189 J
x4
2019
2019
2019
2019
2020
2020
2020
2020
2021
2021
Transcribed Image Text:1 2 3 4 5 6 7 8 9 10 x1 25 27 29 31 33 35 37 39 41 43 x2 « x3 278 A 113 B 294 C 217 D 398 E 328 F 343 G 113 H 252 I 189 J x4 2019 2019 2019 2019 2020 2020 2020 2020 2021 2021
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