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Contents
- Types
- Literals
- Type Conversion and Checking
- Numerical operations
- Comparison
- Logical Operations
- Complex Number Operations
- Bitwise Operations
- Updating Operations (only available in Julia)
Number Types
Types
| Matlab (2020b) |
Julia (1.6) |
Notes |
|
Float16 |
|
single |
Float32 |
|
double |
Float64 |
|
|
BigFloat |
|
int8 |
Int8 |
|
int16 |
Int16 |
|
int32 |
Int32 |
|
int64 |
Int64 |
|
|
Int128 |
|
uint8 |
UInt8 |
|
uint16 |
UInt16 |
|
uint32 |
UInt32 |
|
uint64 |
UInt64 |
|
|
UInt128 |
|
|
BigInt |
|
double |
Complex{Float64} |
Julia uses different type for complex numbers which may have specialized type in the form of Complex{type} |
logical |
Bool |
|
Literals
| Matlab (2020b) |
Julia (1.6) |
Notes |
int64(1) |
1 |
integer value. By default matlab always initialize number without explicit type to double |
0x12 |
0x12 |
hexadecimal |
0b011100 |
0b011100 |
binary value |
0b11110001u64 |
UInt64(0b11110001) |
|
1 or 1. or 1.0 |
1. or 1.0 |
float value |
.5 or 0.5 |
.5 or 0.5 |
float |
|
10_000 |
use _ to separate thousands |
|
0.000_000_005 |
use _ to separate digits |
|
0b1011_0010 |
use _ to separate digits |
1 + 2i |
1 + 2im |
complex number |
true |
true |
boolean true literal |
false |
false |
boolean false literal |
nan or NaN |
NaN |
Not a number |
inf or Inf |
Inf |
Infinity, can be -Inf or +Inf for negative and positive infinity respectively |
Type Conversion and Checking
| Matlab (2020b) |
Julia (1.6) |
Notes |
uint8(2.0) |
UInt8(2.0) |
Convert to uint8 from float. Use similar function to convert from one type to another |
class(a) |
typeof(a) |
Find the type of variable a |
isnan, isinf, isinteger, isreal, isfinite, isnumeric |
isnan, isinf, isinteger, isreal, isfinite, isnumeric |
Same functionality |
isfloat |
isreal |
|
Numerical Operations
| Matlab (2020b) |
Julia (1.6) |
Notes |
+x |
+x |
unary plus |
-x |
-x |
unary minus |
x + y |
x + y |
addition |
x - y |
x - y |
subtraction |
x * y |
x * y |
multiplication |
x / y |
x / y |
division |
floor(x/y) |
x ÷ y |
integer divide truncated to an integer |
x \ y |
x \ y |
inverse divide equivalent to y / x |
x ^ y |
x ^ y |
raises x to the yth power |
rem(x, y) |
rem(x, y) |
reminder |
rem(x, y) |
x % y |
reminder |
mod(x, y) |
mod(x, y) |
modulo |
int64(1) + 2.2 |
1 + round(2.2) |
result is 3 |
1 + 2.2 |
1 + 2.2 |
result is 3.2 |
In case of mixed types
- matlab convert to common super type, i.e. double is converted to integer causing loss of precision
- Julia convert to higher precision, i.e integer is promoted to double
Note difference between mod and rem in both Matlab and Julia is that mod returns the 0 or same sign as divisor (y) and rem returns same sign as divident (x). So mod(-5, 3) returns 1 and rem(-5, 3) returns -2. While mod(5, -3) returns -1 and rem(5, -3) returns 2
Comparison
| Matlab (2020b) |
Julia (1.6) |
Notes |
== |
== |
equality |
~= |
!= or ≠ |
inequality |
< |
< |
less than |
<= |
<= or ≤ |
less than or equal to |
> |
> |
greater than |
>= |
>= or ≥ |
greater than or equal to |
Logical Operations
| Matlab (2020b) |
Julia (1.6) |
Notes |
~x |
!x |
negation |
x && y |
x && y |
logical shortcut and |
x || y |
x || y |
logical shortcut or |
Complex Number Operations
| Matlab (2020b) |
Julia (1.6) |
Notes |
1+2i |
1+2im |
complex number |
complex(1, 2) |
complex(1, 2) |
complex number |
real(1 + 2i) |
real(1 + 2im) |
|
imag(1 + 2i) |
imag(1 + 2im) |
|
conj(1 + 2i) |
conj(1 + 2im) |
|
abs(1 + 2i) |
abs(1 + 2im) |
absolute |
abs(1 + 2i)^2 |
abs2(1 + 2im) |
absolute squared |
angle(1 + 2i) |
angle(1 + 2im) |
|
sqrt(i) |
sqrt(1im) |
|
sqrt(-1) |
sqrt(Complex(-1)) |
Julia will generate error for sqrt(-1) |
sqrt(-1) |
sqrt(-1 + 0im) |
Julia will generate error for sqrt(-1) |
Bitwise Operations
| Matlab (2020b) |
Julia (1.6) |
Notes |
bitcmp(x) |
~x |
bitwise not |
bitand(x, y) |
x & y |
bitwise and |
bitor(x, y) |
x | y |
bitwise or |
bitxor(x, y) |
x ⊻ y |
bitwise xor (exclusive or) |
bitshift(x, -y) |
x >>> y |
logical shift right. In matlab if x is negative it turns into arightmatic shift right. |
|
x >> y |
arithmetic shift right |
bitshift(x, y) |
x << y |
logical/arithmetic shift left |
Updating Operations (only available in Julia)
| Matlab (2020b) |
Julia (1.6) |
Notes |
|
+= |
|
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-= |
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*= |
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/= |
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\= |
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÷= |
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%= |
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^= |
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&= |
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|= |
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|
⊻= |
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>>>= |
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>>= |
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<<= |
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