CS 1371 final
Terms
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VECTORS:
DIRECT ENTRY
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Input values of the vector directly.
ex: vec = [1 2 3]
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VECTORS:
COLON OPERATOR INPUT
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Input values into a vector by giving a range of values. Default steps is 1.
ex: vec = 1:3
= [1 2 3]
ex: backwards: vec = 3:-1:1
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VECTORS:
INDEXING
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Removes values specified by index.
ex: vec = [5 3 1 7 8 2 9]
vec([2, 4, 6])
= [3 7 2]
Can also erase values in a vector
ex: vec([2, 4, 6]) = []
&
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VECTOR OPERATIONS
RANDOM NUMBER GENERATOR IN VECTOR
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rand(#R, #C)
-gives random numbers between 0 and 1
-to change range of rand-->
ex: random #s from 8-10
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VECTOR OPERATIONS
OTHERS
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ones(#R, #C) => gives a vector of 1s
zeros(#R, #C) => gives a vector of 0s
linspace(start, stop, # of elements) => gives
&nb
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DATA TYPES
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"char" = characters/strings. ex: 'abc'
"doubles" = numbers/numerical vectors. ex: 2, [1 2 3]
"cell" = cell arrays. ex: {'abc'} {5}
"logical" = true or false, 1 or 0&
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CELL ARRAYS
ACCESSING DATA IN ARRAY
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ca{row,col}
or
ca{row,col}(3) <= used if trying to find certain value in a vector that was part of a ca
ex: ca = {'a', [1 3]; 'c', 4}
to access the number 3:
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CELL ARRAYS
DATA INPUT
-
v = {'a',[1 3];'c', 4}
or
v = [{'a'}, {[1 3]}; {'c'}, {4}]
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STRUCTURES
CREATING STRUCTURES: DIRECT
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student.name = 'Michael'
student.age = 20
student.major = Mechanical Engineering
student
= name: Michael
age: 20
major: Mech
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STRUCTURES
CREATING STRUCTURES: USING STRUCT() FUNCTION
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student = struct('name', 'Michael', 'age', 20, 'major', 'Mechanical Engineering')
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STRUCTURES
FIELD OPERATOR FUNCTIONS
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setfield() => adds or changes a field
ex: newStruct = setfield(myStruct, 'housing', 'Glenn')
getfield(structure, field)
rmfield(structure, fi
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FUNCTIONS
VALID FUNCTION HEADERS
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function [out1, out2] = name(in1,in2)
function [] = name(in1, in2)
function name(inputs)
function output = name(inputs)
- CONDITIONALS
-
if/switch statements
switch x
case 5
out = 'no'
case 3
out = 'yes'
&
- ITTERATION
-
for/while loops
-while loops move toward a terminating condition
ex: vec = 1:10
counter = 1
while(vec(counter)<
- RECURSION
-
similar to while loops
trace function
3 conditions for recursion function
-must call a clone of itself
-must have a terminating condition
-must move toward terminati
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FILE I/O
LOWER LEVEL FUNCTIONS
-
fopen - file open
fclose - file close
fgets - gets entire line including delimitor
fgetm - does not includ delimitors
fprintf - prints file data
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FILE I/O
HIGHER LEVEL FUNCTIONS
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[num txt raw] = xlsread(filename)
xlswrite
csvread
dlmread
- PLOTTING
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plot(x,y)
xlabel('name') or xlabel name
title('name')
subplot(R,C,subplot#)
ex:
subplot(2,2,1)
plot(x,y)
1 2
3 4
will plot graph in 1st subplot
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BODIES OF ROTATION
CODING
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Take function: y = x^(1/2)
y = v and x = u
u = 0:100
v = sqrt(u)
th = linspace(0, 2*pi)
[uu tth] = meshgrid(u, th)
[vv tth] = meshgrid(v, th)
rr = uu
yy = vv
zz = rr.*sin(tth)
xx =