MATLAB is a high-level language and interactive programming environment developed by MathWorks. It is the foundation for a number of other tools, including Simulink and various toolboxes that extend the core capabilities.

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2
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0answers
6 views

Rotation logic for MNIST Handwritten Digit Dataset

I am currently applying some pre-processing to this dataset. Some of the digits are extremely rotated and I would like to know how others managed to get them 'upright'. I have implemented something ...
0
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0answers
4 views

Why is Octave not recognizing 'randindex' after a few iterations? [migrated]

I'm using SwarmOps in Octave. (I'm new to Octave.) In particular, I'm using PSO. The program seems to be running fine for a few iterations, but after a while I'm getting the error: "`randindex' ...
-2
votes
0answers
35 views

How to use statement functions with arrays in Fortran 90 [migrated]

I am translating a Matlab code into Fortran 90 and am trying to translate the following piece of code: func= inline('x+ y+ z', 'x', 'y', 'z') x(1)= 1, y(1)= 1, z(1)= 1 for n= 1:5 output= 5+ ...
-3
votes
1answer
47 views

How can I be sure my MATLAB code will run on an older version?

I recently wrote some code in MATLAB 2016. My professor uses MATLAB 2010, so I want to make sure that the code will run in 2010. As an initial test, I downloaded MATLAB 2010 and tried running my code. ...
-1
votes
2answers
101 views

Translate MATLAB expressions containing “^” power operator to C++ syntax [closed]

Brief: I have several very large math expressions written in Matlab/Octave syntax. I want to evaluate them within a C++ function by copy and pasting them in, however the problem is they contain "^" ...
3
votes
2answers
100 views

User Inputs: Bounding Box, best practice?

I am creating a function in matlab that takes in two lat/long coordinates (opposite corners of a rectangle) and returns information about data in the region. How do I group my inputs? e.g. ...
2
votes
3answers
141 views

Can programs of different languages communicate information without file io? [duplicate]

Is it possible to write a C++ program that, say, passes an int array to a java program without writing it to a file? Motivation for question: I was wondering what matlab is and how it came to be an ...
0
votes
1answer
53 views

Dealing with data containing integer overflow, rollover

I am writing a small matlab function to analyze data from a laser probe. The data to be analyzed is basically: x-data: Position. y-data: Laser (light) intensity. ...
0
votes
2answers
165 views

How to change the same code stored in several places after I improve one of them?

I have some code written in Matlab. I use the code in different folders which contains different data. Because I want to change some parameters for each different data, I keep the code in the folder ...
6
votes
2answers
296 views

Is there something peculiar to Matlab or Mathworks that supports so much “undocumented” code?

I've been drilling into a lot of Matlab recently trying to interface with an in house algorithm engineer's work to modularize it for use in a test bench outside his suite of applications. I've come ...
2
votes
1answer
767 views

Plotting electrical field lines on a 2d plane [closed]

How do you plot equipotential electrical field lines on a 2d plot in MATLAB. Would it be best to use either quiver or contourf? Some example points are: p1 = (1,1) with 1 coulomb charge. p2 = (2,2) ...
3
votes
1answer
141 views

Where does test fixture code fit in?

This is an unusual question since I don't believe it lends itself to typical software development practices but I hope you can prove me wrong. In MATLAB, my team have created several signal ...
0
votes
1answer
74 views

Should instance variables be bound to the instance right in the beginning of the method they are created in?

A common problem for me - and it's not really a problem, but somehow I again and again ask myself, what is the normal way to handle this - is that there is a method and within this method a couple of ...
8
votes
4answers
1k views

Why are scientific programming languages so weird? [closed]

It seems to me that programming languages meant for use in science and engineering are consistently weird compared to general-purpose languages. Some examples off the top of my head: In Matlab, each ...
1
vote
2answers
326 views

How to reduce close points

input: C matrix 2xN (2D points) output: C matrix 2xM (2D points) with equal or less points. Lets say we have C matrix 2xN that contains several 2D points, and it looks something like that: What we ...
1
vote
2answers
219 views

Is input validation necessary?

This is a very naive question about input validation in general. I'm a MATLAB user (1.5 years old) and I learned about input validation techniques such as "parse" and "validatestring". In fact, ...
0
votes
3answers
427 views

algorithm to create all possible column vectors of size N containing only ones and zeroes [closed]

I am a mathematics student and am just starting to learn about programming. I am stuck on a particular program I am trying to write for fun. I want to find an algorithm to create all possible column ...
1
vote
1answer
1k views

Programming Discrete Wavelet Transform

I am trying to program Discrete Wavelet Transform in Matlab. I do understand that their are various libraries available, but my project requires that I must implement it from scratch. I am taking a ...
3
votes
1answer
444 views

How do I transparently cache data in intermediate stages of processing?

I am working with MATLAB on a model reduction algorithm. It is basically a data processing pipeline. ckt = generate_ckt(ckt_properties); freq = generate_fpoints(fconfig); result = ...
5
votes
1answer
2k views

In MATLAB, how can 'preallocating' cell arrays improve performance?

I was reading this article on MathWorks about improving MATLAB performance and you will notice that one of the first suggestions is to preallocate arrays, which makes sense. But it also says that ...
1
vote
2answers
189 views

Trying to sort the coefficients of the polynomial (z-a)(z-b)(z-c)…(z-n) into a vector

So I have a factored polynomial of the form (z-a)(z-b)(z-c)...(z-n) for n an even positive integer. Thus the coefficient of z^k for 0 <= k < n will be the sum of all distinct n-k element ...
4
votes
5answers
458 views

Lines of Code vs. Optimal Language [closed]

I was wondering whether it is possible to give any advice as the the maximum number of lines of code at which one should consider switching from say MATLAB to a more low level language? Is it even ...
0
votes
2answers
311 views

Data acquisition, storage and management

I have a device that can measure different values over time, one sample per second. After one measurement run I can export the data in form of a CSV-file. One row per second with timestamp and about ...
13
votes
3answers
2k views

Implementing technical paper algorithms in C++ or MATLAB

I am an Electrical Engineering undergrad. I've reading many technical papers about Signal and Image processing algorithms (reconstruction, segmentation, filtering, etc). Most of the algorithms shown ...
9
votes
5answers
11k views

Moving to Python (SciPy and NumPy) for Scientific Computing [duplicate]

Just read a presentation about using Python for Scientific Computing. I am currently using MATLAB (student license FTW, which will expire when I graduate soon). So I was wondering how matured SciPy ...
8
votes
7answers
3k views

How to explain OOP to a matlab programmer? [closed]

I have a lot of friends who come from electrical / physical / mechanical engineering background, and are curious about what is "OOP" all about. They all know Matlab quite well, so they do have basic ...
15
votes
7answers
1k views

Is there a recommended way to communicate scientific/engineering programming to C developers?

I have a lot of MATLAB code that needs to get ported to C (execution speed is critical for this work) as part of a back-end process for a web application. When I attempt to outsource this code to a C ...
21
votes
6answers
6k views

Surviving MATLAB and R as a Hardcore Programmer [closed]

I love programming in languages that seem geared towards hardcore programmers. (My favorites are Python and D.) MATLAB is geared towards engineers and R is geared towards statisticians, and it seems ...