Questions tagged [matlab]
Questions related to interoperability between Mathematica and MATLAB, or implementation of MATLAB functionality in Mathematica. This tag is NOT for pure MATLAB question.
166
questions
0
votes
1
answer
88
views
How to convert the Mathematica matrix to MATLAB format and using MATLAB to verify the solution?
I have got the solution of the matrix system and get the solution using LinearSolve, and now I want to use MATLAB to see whether it can generate the same solution, ...
- 119
7
votes
0
answers
251
views
Code for quasi 1D nozzle flows
The quasi-one-dimensional model describing the flow of compressible gas in rocket nozzles is very common. The corresponding equations have a divergent non dimensional form
$ \frac{\partial \mathbf{U}}...
- 41.1k
1
vote
0
answers
96
views
Matlab to Mathematica code to solve system of ODEs [closed]
I have the following system of second order non-homogeneous DEs:
\begin{align}
0 &= 2 x_t - J_{\pi_t}(x_t) \frac{\epsilon - 1}{\theta} (1 + \varphi) + \frac{\partial J_{x_t}(x_t)}{\partial x_t} \...
- 407
3
votes
2
answers
266
views
Givens rotation: What is the Mathematica equivalent to MATLAB's planerot function?
Matlab has a function called planerot which takes a two-component column vector $x$ as input and returns a $2 \times 2$ matrix $G$ and a two component column vector ...
- 301
4
votes
1
answer
173
views
How to export a matrix with complex entries having arbitrary precision from Mathematica to Matlab?
I am trying to export a large matrix with complex entires having arbitrary precision (~ roughly 200 digits after the decimal point) from Mathematica to Matlab.
I have used ...
- 301
1
vote
1
answer
133
views
0
votes
0
answers
83
views
An Error in `MATLink`
I downloaded MATLink to the directory generated by the command: (Matlab 2022b and Mathematica 13.1 on windows 10)
...
- 672
1
vote
1
answer
197
views
Convert Matlab code for Fourier transform equivalently into Mathematica
I have a Matlab-style code that uses Fourier transform efficiently. Here is the function which defines a differentiation matrix D, where ...
- 125
0
votes
1
answer
122
views
Exporting a list to Matlab
I have some parameters.
parameters = {c -> 1, d -> 1, e -> 2, f -> 1}
I want to export them to Matlab using ToMatlab...
- 672
6
votes
4
answers
1k
views
Implementation of MATLAB's "numgrid" function [closed]
I am looking for an implementation of MATLAB's numgrid function, in particular the "B" mode.
For example, I want to get the matrix corresponding to the ...
- 8,059
1
vote
0
answers
47
views
Using `GradientFilter[]` and `GradientOrientationFilter[]` to reproduce Matlab's `gradient()` function
In 'gradient' function in MMA, two methods are given to reproduce Matlab's gradient() function. I thought that ...
- 1,200
4
votes
1
answer
184
views
Use function defined in Mathematica from Matlab
This question is the same as this post which was closed too early to be answered and efforts to reopen it were unsuccessful.
How could we use a defined function inside Mathematica from Matlab?
With ...
- 9,079
2
votes
0
answers
198
views
Call function defined in Mathematica from Matlab [closed]
Is it possible to call a defined function inside Mathematica like InterpolationFunction[...] from Matlab?
Thanks!
- 47.2k
0
votes
1
answer
150
views
Cannot open MATLAB from MATHEMATICA
I am using MATLAB R18 and MATHEMATICA 12. I downloaded MATlink to the directory generated by the command:
...
- 31
6
votes
2
answers
465
views
Compare MMA program with MATLAB program by plotting the same equation
Cross-posted in Wolfram Community.
Firstly, the MATLAB program is
...
- 115
0
votes
0
answers
84
views
Surface crossing itself plotted from x,y,z data
In Matlab I am generating this surface for example.
It is plotted in for loop, so in each iteration I plot one ellipse or whatever itself crossing curve. Number of iteration is high so it produce ...
- 121
7
votes
1
answer
996
views
How can I generate the same random number in Mathematica and MATLAB?
As a part of my research studies, I have developed a code which is essentially based on random generation of numbers. The first version of the code was written in MATLAB, however, for some reasons I ...
- 1,243
1
vote
1
answer
255
views
How to express number in exponential decimal such as 1e2=100?
I am using MATLAB for a long time, and usually I express the number as exponential decimal such as
x = 1e2; % x=100
However, if I write this form in mathematica, ...
- 13
2
votes
1
answer
149
views
Matlab code to Mathematica, Tensor
I am trying to convert a Matlab code to Mathematica.
I have a tensor, RF (a,b,c,d) which is constructed from Hamiltonian (Hs) and 2x2 identity matrix (DS):
...
- 139
0
votes
1
answer
149
views
Implementing an optimization algorithm in WL
I am trying to implement the Jaya optimization algorithm (Jaya). This is a flowchart from the Author 's webpage showing the details of the Algorithm.
Note that there is a typo in the equation in the ...
1
vote
1
answer
216
views
'quiver' function in MMA (quiver(x,y,u,v))
How to calculate Quiver using the "quiver function" ("Matlab-like")?
quiver(x,y,u,v) plots vectors as arrows at the coordinates specified
in each corresponding pair of elements in ...
- 1,816
5
votes
2
answers
726
views
'gradient' function in MMA
How to calculate Numerical gradient of 2D arrays using the "gradient function" ("Matlab-like")?
"[___] = gradient(F,hx,hy,...,hN) specifies N spacing parameters for
the ...
- 1,816
2
votes
1
answer
259
views
Create a matrix without definition of dimensions
is it possible to define a matrix without giving its dimensions in Mathematica,
e.g.
First line:
mattest[[1,2]] = 1;
Second line:
...
- 1,816
1
vote
1
answer
226
views
ListContourPlot in Mathematica
I tried to plot the following curves in Mathematica using "ListContourPlot" , and compared them with the results from Matlab 2019a.
Mathematica code: (cite from Reference (1))
...
- 1,816
2
votes
1
answer
316
views
Diagonal matrix command in Mathematica
How to find the corresponding Mathematica commands for diagonal matrix operation in Matlab, e.g.
AA=rand(3,3);
Step 1.) finding the diagonal elements, and export ...
- 1,816
-3
votes
1
answer
431
views
Need help to convert a Matlab script into a Mathematica script?
I would like to convert a small script but a little technical in Mathematica language. Here is the Matlab script :
...
1
vote
0
answers
246
views
Import matlab MAT-format fails
As I did many times before, after updating Mathematica v12.2 I have problem to import matlab *.mat file:
I checked
...
- 47.2k
5
votes
1
answer
125
views
How to determine the file type of a .m file?
Both Mathematica and MATLAB widely uses .m files, but with diametrically different syntaxes and usage. Currently WRI is moving towards the ...
- 812
12
votes
2
answers
687
views
InverseRadon behaves differently from iradon of MATLAB
I have to calculate a 2-dimensional radially symmetric distribution from a single projection.
I know that InverseRadon should actually do the job, but I get the ...
- 1,255
3
votes
3
answers
699
views
Changing value of specific element in an array. (Converting code from MATLAB to Mathematica)
Can we change the value of a specific element of an array in Mathematica?
Basically, I have the following given MATLAB script which writes a big 3N-by-3N matrix $h$ by combining two 3-by-3 matrices $...
- 153
0
votes
0
answers
93
views
Is it possible to implement this Matlab code for the normal form of a bipartite operator in Mathematica?
I am interested in converting the $16 \times 16$ ("density") matrix
...
- 2,315
1
vote
1
answer
62
views
Create table A with entries of the form Ai_j
I would like to create an $m \times n$-table A with entries Ai_j, where $1 \leq i \leq m$ and $1 \leq j \leq n$. I have seen ...
- 265
3
votes
1
answer
264
views
Matlab Code and Mathematica Code both identical with different results [closed]
I have spent so much time working around with this code to give the same identical answer as the code I have written before over Matlab.
I am just trying to switch towards using Mathematica in my ...
- 67
6
votes
1
answer
488
views
Different results using spline interpolation in Wolfram and MATLAB
I use the same data for interpolation in Mathematica and MATLAB, but the result is different.
...
- 63
0
votes
1
answer
105
views
How to discritize a function domain (break xy-plane to a grid/mesh of squares with vertex values for evaluation)? [closed]
I wrote a code using MATLAB to discritize a function's 2D domain into squares/rectangles, whose vertex data (x,y) I can use to evaluate the function at. Then I sum these values over all vertices to ...
- 306
1
vote
0
answers
222
views
Mathematica to Matlab (not "so easy" code) [closed]
Based on a Wolfram Demonstration of the Ising ferromagnet using Monte-Carlo Metropolis, I modified it a bit to the anti-ferromagnet case and to get the plot of the order parameters as a function of ...
- 711
2
votes
1
answer
236
views
Problem in setting up MATlink
I am trying to set up a MATlink using the instructions given here. I get an error while running the following commands
Needs["MATLink`"]
OpenMATLAB[]
Error:
<...
- 329
10
votes
1
answer
807
views
Moving B.C.s in heat diffusion model
I came across the paper Solidification dynamics of an impacted drop regarding a heat equations by Thiévenaz et.al and was interested in knowing how they obtained the graphs presented. From what I ...
- 369
0
votes
1
answer
144
views
How can I convert my MATLAB code into WL code?
I am working in MATLAB and want to convert the following snippet into WL code to run on Mathematica.
...
- 101
2
votes
1
answer
60
views
How to import a matrix of integers from MATLAB?
I am importing a matrix from MATLAB. However, there are some redundant items added in the imported matrix.
For example, the imported matrix is a binary matrix. After import, it looks like this
...
- 565
12
votes
1
answer
2k
views
Row vectors and column vectors (Mathematica vs. MATLAB)
As far as I know, Mathematica does not distinguish between row vectors and column vectors: all vectors are seen as lists. I know ways to bypass this as suggested in Product between a column vector and ...
- 4,784
6
votes
1
answer
1k
views
Frequency Response
How to plot frequency response which includes magnitude response and phase response of a transfer function in Mathematica?
In Matlab, we can use [h,k]=freqz(b, a, N); to generate magnitude response ...
2
votes
1
answer
449
views
Analog of MATLAB's conv2 in Mathematica?
I have a matlab code
filter = 1;
F = conv2(double([1 2 1]),double([1 2 1]'))/16;
for i=1:some_integer
filter = conv2(double(filter),double(F));
end
In the ...
- 8,860
6
votes
2
answers
388
views
Simulating ndgrid function of MATLAB
I know that there has been an answer on meshgrid function of MATLAB. For functions involving more than 3 variables, this function does not work. In MATLAB, the ...
- 748
2
votes
0
answers
87
views
How to evaluate expressions in Mathematica from MATLAB?
I found a lot of information and examples on how to communicate from Mathematica to Matlab using MATLink, but nothing for the other way around. I would like to use Matlab to send variables and ...
2
votes
2
answers
290
views
Using list of rules from imported .mat file
I'm attempting to learn Mathematica to replace MATLAB. However, I have some data in .mat files which contains named variables.
Whenever I import the .mat file, I get a list of rules. What's the best ...
- 129
5
votes
0
answers
737
views
Is there a way of reading the data out of a MATLAB's ".fig" file in Mathematica?
I have a ".fig" file from MATLAB that I know is a list of $ (x, y) $ coordinates. As far as I know, the ".fig" format stores the data and recreates it every time is opened. I would like to get the ...
- 76
-1
votes
1
answer
223
views
Native function in Mathematica export functions from Mathematica to MATLAB
Is there any native function in Mathematica (not ToMatlab) that I can export a function from Mathematica to MATLAB, to Paraview or to any plotting software?
Clarification:
I want to export something ...
- 869
6
votes
1
answer
571
views
An efficient way to translate a triple for-loop from Matlab to Mathematica
This is my first post on StackExchange, so if I violate any etiquettes, I apologize in advance. I am a senior engineering student who has been using Mathematica for a year now. For one of my classes, ...
- 87
4
votes
2
answers
626
views
Why does NDSolve blow up when given my ODE but bvp4c in Matlab does not?
I am numerically solving the following ODE initially using NDSolve in Mathematica(updated and corrected):
$-(-\frac{z'(r)}{r \sqrt{z'(r)^2+1}}-\frac{z''(r)}{\left(z'(r)^2+1\right)^{3/2}})=A_1(z(r)+H)...
- 41