Chapter 3 : Functions and Files Flashcards
1
Q
absolute value of x
A
abs(x)
2
Q
complex conjugate
A
conj(x)
3
Q
imaginary part of a complex number x
A
imag(x)
4
Q
real part of a complex number x
A
real(x)
5
Q
round to the nearest integer toward infinty
A
ceil(x)
6
Q
round to the nearest integer towards zero
A
fix(x)
7
Q
round to the nearest integer toward negative infinity
A
floor(x)
8
Q
round to the nearest integer
A
round(x)
9
Q
sign(x)
A
signum function:
+1 if x>0
0 if x=0
-1 if x<0
10
Q
angle of a complex number
A
angle(x)
11
Q
cosh(x)
A
hyperbolic cosine
cosh x = (e^x + e^-x)/2
12
Q
acosh(x)
A
inverse hyperbolic cosine
13
Q
create a function (a .m file)
A
function [output variables] = function_name (input variables)
14
Q
the initial text for a function in the main program
A
[output] = file_name (input)
15
Q
how to upload an xls
A
A = xlsread(‘filename’)
