Variables & Arithmetic

Question 1

Clear command window

Answer 1

clc

Question 2

Clear variables in workspace

Answer 2

clearvars

Question 3

Assigning values to variables

Answer 3

Variable = value

Question 4

How do we see all variables and their values?

Answer 4

Whos

Question 5

How do we get strings?

Answer 5

Using quotation marks

w = “string”

Question 6

What do we use for not showing results in command windows?

Answer 6

Use semicolon for not showing the output of a line.

x = 10 + 9 ;

Question 7

What do we use for assigning multiple things in one line?

Answer 7

Use commas for using several variables in one line:

U = 20 , Me = 20

Question 8

How do we run programs quickly?

Answer 8

Ctrl + Enter

Question 9

How do we add comments?

Answer 9

Using percentage sign

% This is a comment

Question 10

How to check the type of data of a variable?

Answer 10

By using the function “class”. This is how:

class(variable)

Question 11

How to create structures like objects in python?

Answer 11

An example would be:

my_struct.name = “Aldair”
my_struct.age = 30
my_struct.gender = “male”

Question 12

Some built in functions for structures?

Answer 12

isfield(my_struct, field)

rmfield(my_struc, field)

setfield(my_struct, field)

Question 13

Can I set structures within structures?

Answer 13

Yes, like this (example)

my_struct.contact.phone
my_struct.contact.email

I created a field contact that is itself a structure that has two fields

Question 14

Manually creating a structure?

Answer 14

my_struct = struct(field1, value1, field2, value2,…, field_n, value_n)