- MATLAB–Python–Julia cheatsheet
MATLABCHEATSHEET Forloops for k = 1:5 disp(k); end Whileloops k = 0; while k.
- MATLAB commands in numerical Python (NumPy) 3 Vidar Bronken Gundersen /mathesaurus.sf.net 2.5 Round off Desc. Matlab/Octave Python R Round round(a) around(a) or math.round(a) round(a) Round up ceil(a) ceil(a) ceil(a) Round down floor(a) floor(a) floor(a) Round towards zero fix(a) fix(a) 2.6 Mathematical constants Desc. Matlab/Octave Python R.
- MATLAB Cheat Sheet Basic Commands% Indicates rest of line is commented out.; If used at end of command it suppresses output. If used within matrix definitions it indicates the end of a row. Save filename Saves all variables currently in workspace to file filename.mat. Save filename x y z Saves x, y, and z to file filename.mat.
Dependencies and Setup¶
In the Python code we assume that you have already run importnumpyasnp
In the Julia, we assume you are using v1.0.2 or later with Compat v1.3.0 or later and have run usingLinearAlgebra,Statistics,Compat
Creating Vectors¶
Operation | MATLAB | Python | Julia |
---|---|---|---|
Row vector: size (1, n) | |||
Column vector: size (n, 1) | |||
1d array: size (n, ) | Not possible | or | |
Integers from j to n withstep size k | |||
Linearly spaced vectorof k points |
Creating Matrices¶
Operation | MATLAB | Python | Julia |
---|---|---|---|
Create a matrix | |||
2 x 2 matrix of zeros | |||
2 x 2 matrix of ones | |||
2 x 2 identity matrix | |||
Diagonal matrix | |||
Uniform random numbers | |||
Normal random numbers | |||
Sparse Matrices | |||
Tridiagonal Matrices |
Manipulating Vectors and Matrices¶
Operation | MATLAB | Python | Julia |
---|---|---|---|
Transpose | |||
Complex conjugate transpose(Adjoint) | |||
Concatenate horizontally | or | or | |
Concatenate vertically | or | or | |
Reshape (to 5 rows, 2 columns) | |||
Convert matrix to vector | |||
Flip left/right | |||
Flip up/down | |||
Repeat matrix (3 times in therow dimension, 4 times in thecolumn dimension) | |||
Preallocating/Similar | N/A similar type | ||
Broadcast a function over acollection/matrix/vector | Functions broadcast directly | Functions broadcast directly |
Accessing Vector/Matrix Elements¶
Operation | MATLAB | Python | Julia |
---|---|---|---|
Access one element | |||
Access specific rows | |||
Access specific columns | |||
Remove a row | |||
Diagonals of matrix | |||
Get dimensions of matrix |
Mathematical Operations¶
Operation | MATLAB | Python | Julia |
---|---|---|---|
Dot product | |||
Matrix multiplication | |||
Inplace matrix multiplication | Not possible | ||
Element-wise multiplication | |||
Matrix to a power | |||
Matrix to a power, elementwise | |||
Inverse | or | or | |
Determinant | |||
Eigenvalues and eigenvectors | |||
Euclidean norm | |||
Solve linear system(Ax=b) (when (A)is square) | |||
Solve least squares problem(Ax=b) (when (A)is rectangular) |
Sum / max / min¶
Operation | MATLAB | Python | Julia |
---|---|---|---|
Sum / max / min ofeach column | |||
Sum / max / min of each row | |||
Sum / max / min ofentire matrix | |||
Cumulative sum / max / minby row | |||
Cumulative sum / max / minby column |
Programming¶
Operation | MATLAB | Python | Julia |
---|---|---|---|
Comment one line | |||
Comment block | |||
For loop | |||
While loop | |||
If | |||
If / else | |||
Print text and variable | |||
Function: anonymous | |||
Function | |||
Tuples | Can use cells but watch performance | ||
Named Tuples/Anonymous Structures | |||
Closures | |||
Inplace Modification | No consistent or simple syntaxto achieve this |
fprintf
%4.2f in the formatSpec input specifies that the first value in each line of output is a floating-point number with a field width of four digits, including two digits after the decimal point. %8.3f in the formatSpec input specifies that the second value in each line of output is a floating-point number with a field width of eight digits, including three digits after the decimal point. n is a control character that starts a new line.Line Properties
Color:red = r
green = g
blue = b


magenta = m
yellow = y
black = k

white = w
none
LineStyle:
solid line = -
dashed line = --
dotted line = :
dash dotted line = -.
no line = none
Marker:

Cheat Sheet Terraria
circle = o
plus sign = +
asterisk = *
point = .
cross = x
Matlab Cheat Sheets
square = square or sMatlab Cheat Sheet Pdf
diamond = diamond or dnone = none
MarkerEdgeColor & MarkerFaceColor:
Numpy Matlab Cheat Sheet
same as color
MarkerIndices
max
mean
plot examples
plot examples
sum
fprintf
%d in the formatSpec input prints each value in the vector, round(a), as a signed integer.building arrays/loops
max loop
