The tag has no wiki summary.

learn more… | top users | synonyms

1
vote
1answer
124 views

Having trouble translating Matlab `fsolve` into Mathematica

I searched the site and found that someone said FindRoot is equivalent to fsolve, however, without proper options, ...
1
vote
1answer
36 views

How to apply different colors to different contours

I have searched the forum, I hope this isn't a duplicate question. I try to apply unique color for every contour line with the same elevation. In short, I want to create a MATLAB style contour plot. ...
10
votes
1answer
155 views

Any solution to transfer data between Python and Mathematica

I think Mathematica handles .mat file not very well, python is pretty good at this kind of jobs. In this site, there are plenty of question related to calling Mathematica from Python, or calling ...
0
votes
0answers
73 views

Differences between FFT and analytical Fourier Transform

In MATLAB, if I perform an FFT on a simple Gaussian spot with a phase grating: ...
2
votes
1answer
171 views

Making Mathematica function files like in MATLAB

I'm a MATLAB user trying to get familiar with Mathematica. I have long Mathematica sheet that spits out some matrices at the end after much math. I want to run a loop over couple of different initial ...
0
votes
0answers
33 views

Exporting the NDSolve to matlab with the argument

a = Table[Evaluate[y[x] /. sol], {x, 0, 10, 0.01}]; Export["a.mat", a]; works just fine but ...
2
votes
2answers
151 views

NIntegrate over a list of functions

This question is the result of these other two questions. Question 1 and 2. I thought it would be better to ask a new question rather than deleting previous one. I think When ...
1
vote
1answer
170 views

Slow evaluation of NIntegrate when used as a pure function

I asked a perhaps related question here. Here is my code in below. The goal is that to define a function which must be integrated numerically. The function itself first is calculated over different ...
3
votes
1answer
265 views

Numerical integration's speed

Consider this numerical integration of Bessel function: Do[NIntegrate[BesselJ[2, x], {x, 0, 10000}], {i, 1, 100}] // AbsoluteTiming {4.033403, Null} This is ...
2
votes
0answers
64 views

System Identification from test data

I've been looking for a way to model a simple SISO system from test data using Mathematica. Something similar to MATLAB's System Identification Toolkit, that estimates a transfer function from the ...
7
votes
2answers
1k views

Dramatic speed difference of code on Matlab and Mathematica

Background: I was trying to convert a Matlab code (fluid simulation, SPH method) into a Mathematica one, but the speed difference is huge. Matlab code: ...
11
votes
1answer
299 views

Does NRoots own an abstract counterpart? If not, can we write one?

We know when solving linear algebra equations, despite its abstract syntax, LinearSolve is much faster compared to Solve: ...
-1
votes
1answer
144 views

Small mismatch in theoretical vs MMA solutions of a damped harmonic oscillator differential equation

I solved the differential equation $$ \ddot y + 0.43 \dot y + y =0.1 \cos(2x), \quad y(0)=1,\ \dot y(0)=1 \quad(0) $$ using both the theoretical results from wikipedia and using MMA (I also tested ...
1
vote
0answers
126 views

Is there an equivalent of “pmtm” of MATLAB?

Recently I'm spending my time implementing some patients' analysis using Mathematica Classify function. But I need to rewrite some MATLAB functions for computing ...
3
votes
1answer
152 views

Using the variable in the MATLAB workspace using MATLink or any other packages

I have a program in MATLAB and after I run the program, I get some results in MATLAB's workspace. Now, I need to use these results in Mathematica. What I currently do is that I save the workspace as a ...
2
votes
1answer
131 views

'eps' equivalent in Mathematica

In Matlab there is a function 'eps'. eps Spacing of floating point numbers. D = eps(X), is the positive distance from ABS(X) to the next larger in magnitude floating point number of ...
1
vote
0answers
155 views

Mathematica + System Modeler or Matlab + Simulink [closed]

I want to learn control systems(Using Ogata Modern Control Systems Book) and I am not sure in which should I invest : Matlab+Simulink+Control systems = aprox 220 euro Mathematica + Workbench + ...
3
votes
1answer
156 views

Importing data from Matlab, using data in “NSolve” and send the results back to Matlab

I have generated an image processing code in Matlab. It has several subroutines and in one of them, I should solve a system of 7 nonlinear equations. I use "fsolve" in Matlab to solve this system, ...
0
votes
0answers
171 views

Generate Matlab figure

I am currently working on a project. Because of lack of communication between my team mates and I, I did most of the work (and the graphical figures) in mathematica. Now, I have to pass all the ...
0
votes
0answers
110 views

Converting code from Matlab to Mathematica [duplicate]

I have the following piece of code: ...
0
votes
0answers
443 views

Converting a matlab program into Mathematica 10

I sought help from this entry at Calling MATLAB from Mathematica to see if I could CONVERT a mathlab program which simulates polymer dynamics that is provided at the download section at ...
4
votes
4answers
311 views

Automatically growing lists as in MATLAB?

Is there a way to add elements to a list at positions outside the current list's length? Something equivalent to the following MATLAB code snippet: ...
7
votes
1answer
278 views

Porting code from MATLAB

I'd like to switch from MATLAB to Mathematica for my research in digital signal processing. I used Mathematica a lot during the '90s but I haven't used it since then, so I might as well be a complete ...
1
vote
1answer
123 views
0
votes
1answer
226 views

How to prepare (copy/paste) data from Matlab?

What is the best way to get data from Matlab to Mathematica? For a new project I want to copy/paste a table (or part of it) of datas from Matlab to Mathematica. Copyed from Matlab it is: ...
0
votes
1answer
107 views

Writing equations from Mathematica in Matlab [duplicate]

I would like to use mathematical equations directly in Matlab. I found one thread describing about a built in Matlab file i.e. ToMatlab.m. I am able to download this file, however, I could n't able to ...
5
votes
1answer
405 views

Mathematica-To-MATLAB Dictionary!

Is there a dictionary to translate Mathematica functions and commands to MATLAB?
4
votes
1answer
362 views

ContourPlot3D using a Matlab function through MATLink

I have a Matlab function which accepts a 3 dimensional vector and returns a single number. I want to use this through MATLink to make a 3d plot. A unit sphere: ...
4
votes
3answers
338 views

Approximate minimum degree permutation algorithm in Mathematica

In MATLAB there is a nice implementation of the so called AMD (approximate minimum degree permutation) algorithm named amd (see Online MATLAB Documentation). There is an alternative algorithm called ...
0
votes
1answer
209 views

How to improve the performance of this code

I have implemented a code in Mathematica 9 to simulate a scattering problem, and I got really disappointed about its performance when compared to Matlab. Since I am a newbie in Mathematica, would ...
17
votes
2answers
4k views

Is there an equivalent to MATLAB's linspace? [duplicate]

Does Mathematica have an equivalent to Matlab's linspace? I want to make a list with "start", "stop" and "number of points". What is the neatest way of doing this?
-2
votes
2answers
472 views

Problem with convert matlab function into mathematica version of euler angle

I've wrote a function that will extract euler angle from matrix according to Matlab's function in AeroSpace toolbox's dcm2angle package file. But not quite right. ...
1
vote
1answer
339 views

Import symbolic variables from Matlab with MATLink

I'm trying to manipulate with Mathematica symbolic expression created in Matlab. I'm using the MATLink package, and I've succedeed in importing numerical variables, but not symbolic ones : ...
4
votes
1answer
154 views

What is the equivalent of MATLAB's “timealign” function?

What is the equivalent of MATLAB's "timealign" function? Given two sequences (lists of values) and offsets, timealign will insert 0's into sequences to align them so they have the same number of ...
1
vote
2answers
236 views

How to use Mathematica in my Problem as I would use it in Matlab

I would like to calculate the convolution of a function with itself for $n$ times. Let $n$ be $10$. For $n=1$, I wont make any calculation and $f0$ is my function, when $n=2$, I will convolve $f0$ ...
1
vote
1answer
85 views

An equivalent in Mathematica [duplicate]

Let's say I have a $n$x$m$ matrix $M$ in Matlab and I want to substitute the elements of $M$ that exceed $15$ for $-1$. In Matlab I just write M(M>15)=-1 and ...
7
votes
4answers
922 views

MATLAB To Mathematica: How to implement imshow()

I want to implement the MATLAB imshow function in Mathematica. This is a DensityPlot[] from Mathematica And this is ...
7
votes
3answers
2k views

Simulate MATLAB's meshgrid function

Here is MATLAB's meshgrid. I came up with these implementations in Mathematica: ...
4
votes
2answers
928 views

Does Mathematica have a command analogous to ode45 of MATLAB?

Does anybody know if Mathematica has an analogue of MATLAB's ode45 command? I need to solve a second order coupled ODE system of equations.
1
vote
2answers
558 views

Translating a “Point-to-Triangle” distance script from MATLAB to Mathematica

Update - Thanks everyone for your responses! After fixing a problem with vector normalization, the code below now works. I'm a new user, and I was attempting to port some Mathematica code from ...
5
votes
2answers
1k views

Equivalent of MATLAB's “hold on” function

I'm making an animation where the number of iterations is known. I tried using Dynamic, as I prefer updating in real time over generating data before plotting. I ...
2
votes
1answer
251 views

Export to mat file does not work

I use this command from the Mathematica documentation center Export["1.mat", {"t" -> {{1,2,3}},"u" -> {{4,5,6}}}, "LabeledData"] to save data as mat file ...
6
votes
1answer
790 views

Does Mathematica solve transfer functions differently to Matlab?

Please note this is an edit to the same question posed a few weeks back: I'm using Mathematica to derive the transfer functions for a three phase AC/DC inverter. Given below is the code for the ...
-5
votes
5answers
552 views

Translating MATLAB's cell2mat into Mathematica

How I can define a function in Mathematica such that it acts same as the cell2mat command in MATLAB? Example (in MATLAB): ...
0
votes
1answer
480 views

Calculating orbital period for the logistical map [closed]

I have the following MatLab code ...
12
votes
1answer
575 views

How can I obtain a zero-filled Fourier transform, as produced by MATLAB's fft?

The MATLAB FFT function, fft(X,n), can be used to return the n-point DFT. This effectively extends the original signal, X, to ...
10
votes
2answers
3k views

Is there a Mathematica equivalent to MATLAB's logspace? [duplicate]

Possible Duplicate: How can I get exactly 5 logarithmic divisions of an interval? I want to use Table to generate a list of items, but want the indices ...
0
votes
0answers
73 views

Export expression to Matlab [duplicate]

Possible Duplicate: Is it possible to export the equations from Mathematica to MATLAB? I like to export a Mathematica expression like.... ...
23
votes
1answer
11k views

Is it possible to export the equations from Mathematica to MATLAB?

Is it possible to export the output expressions from Mathematica computations (e.g., equations) in valid MATLAB syntax?
1
vote
1answer
1k views

How to find local minima of a multivariate function with singularity?

I am working on a logistic regression problem which requires minimizing a cost function J[{theta0, theta1, theta2}, X, y] to find the optimal value for fitting ...