Search tree,Tree and binary tree and heap treezia eagle
This document contains definitions and explanations of search trees and heaps. It defines search trees as data structures used for locating specific keys within a set where each node's key must be greater than keys in its left subtree and less than keys in its right subtree. It provides examples of constructing and performing operations on binary search trees like insertion, searching, and deletion. It defines heaps as binary trees that follow the shape and order property, with max heaps having each node greater than its children and min heaps having each node less than its children. It explains representing heaps in arrays and operations like deleting and inserting elements through reheapifying.
Search tree,Tree and binary tree and heap treezia eagle
This document contains definitions and explanations of search trees and heaps. It defines search trees as data structures used for locating specific keys within a set where each node's key must be greater than keys in its left subtree and less than keys in its right subtree. It provides examples of constructing and performing operations on binary search trees like insertion, searching, and deletion. It defines heaps as binary trees that follow the shape and order property, with max heaps having each node greater than its children and min heaps having each node less than its children. It explains representing heaps in arrays and operations like deleting and inserting elements through reheapifying.
7. EDA
Exploratory Data Analysis
探索式資料分析
資料科學家工作內容
- 80% of data science is
sourcing, cleaning, and preparing the data
資料診療室
- Build “data diagnostic” dashboard
- What’s interesting?
- What’s relevant for this use case?
- Any anomalies? Are thresholds useful?
- Stats count by X Y
9. Non-graphical EDA
Single Quantitative Variable
單一定量變數
舉例
Central Location,
Spread, Shape, Outliers.
Single Categorical Variable
單一類別變數
舉例
Gender, Race, Country
How does the distribution of
the DV vary as the IVs change?
DV
(Dependent Variable, 應變數)
IV
(Independent Variables, 自變項)
10. Non-graphical EDA What are we are looking for?
Single Quantitative Variable
單一定量變數
指標
Standard statistics
Mean,
Standard deviation,
Variance
Robust statistics
Median
Others
Q1, Q3,
Skewness, Kurtosis
Single Categorical Variable
單一類別變數
指標
Distribution of Categories
Frequency table
% of total
Statistics by category
How does the distribution of
the DV vary as the IVs change?
指標
Correlation
Missing Value
12. Graphical EDA
Quantitative Univariate data
舉例
Side and Leaf plot
Frequency Histogram
Boxplot
Categorical Univariate Data
舉例
Bar graph
Pie chart
Multiple Variables
舉例
Scatterplot
22. Action Item
聊天或QA。
#Data Scientist
#Technical Sharing / Lecturing
#Python, R, Azure Data Platform
#Community
Reference。
本投影片的Reference
1.Experimental Design for Behavioral
and Social Sciences, from Stat CMU
2.Summarize Data
3.Compute Elementary Statistics
4.Exploratory Data Analysis :Billboard
Hot 100 data for the year 2000
5.Read More
台大 cs+x 期末報告
台大校園用電分析
台大管理學院的迷思
台大交換學生知多少
選擇大學- 大學條件分析
其他。
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