Comp Sci 101 Introduction to Computer Science January

Comp. Sci 101 Introduction to Computer Science January 13, 2015 Prof. Rodger compsci 101 spring 2015 1

Announcements • Reading for next time on calendar page – RQ 2 due Thursday 10 am • Assignment 1 is out today, due in 1 week • Labs – Try to install everything before going to lab – Practice downloading and running program – Programming in Scratch • Today: Problem solving, Scratch, Python compsci 101 spring 2015 2

Visitor today Prof. Ron Parr Chair, Computer Science Department compsci 101 spring 2015 3

How does one get help? • Consulting hours – Sunday-Thursday 7 -11 pm – (see Help tab) • Office hours (prof, TAs) • Piazza – Ask questions – Do not post your code and ask what is wrong! – Post error message and line of code for error message – If added class late, may need to add yourself 4

Your work in the class • Lectures/Labs – work in groups • Assignments/APTs – individual work – Get help from Prof. , TAs, UTAs – Discuss with others in class the general idea, but you must write your own code – Acknowledge anyone you got help from or consulted with – put in README file • DO NOT search for answers on the web or post your code on the web 5

Our Programming Environment • Install 5 items • Why Java? – not using • Eclipse – platform for development • Python – programming language • Pydev – Python IDE for Eclipse • Ambient – turnin/snarf files to/from Duke compsci 101 spring 2015 6

Last Time - Python code hello. py compsci 101 spring 2015 7

Last time - Python code Count 4 -letter words in a file. Questions? 8

Design a data file for testing bit. ly/101 S 15 -0113 -01 How many words? Which words? 9

Should you understand all that code? • Not yet, this is a beginner class. • You will be writing code that is much simpler to start. • Should understand it by the first exam compsci 101 spring 2015 10

Melinda French Gates • Duke Alum, CS/Econ major • Duke Commencement 2013 11

Word Clouds • Number of occurrences/emphasis indicated by size of word • Site to make a word cloud: – wordle. net • U. S. Presidential Speeches: – http: //chir. ag/projects/preztags/ compsci 101 spring 2015 12

Classwork: Word Cloud http: //bit. ly/101 S 15 -0113 -02 • Given a file of words • Discuss how to make a word cloud – How do you organize the words? – What information do you need to calculate? – What do you need to calculate to display words? compsci 101 spring 2015 13

Computer Science and Medicine Prof. Bruce Donald Grad Student: Pablo Gainz compsci 101 spring 2015 14

Concepts you'll learn in Compsci 101 • Programming – Practice, skill, art, science, engineering, creativity • Problem-solving – How to solve problems using programming and a computer • Impact of computer science – Scale and automation: powerful forces • Foundation for future work – In many areas, not limited to compsci@duke compsci 101 spring 2015 15

Programming Examples • Scratch example in class (also in lab) • Hour of code: http: //code. org – Designed for kids, useful to millions • Assignment 1 - Light-bot • Python! compsci 101 spring 2015 16

Scratch scratch. mit. edu • Demo – build Scratch program compsci 101 spring 2015 17