Questions tagged [vectors]

Vectors are sequence containers representing arrays that can change in size. For questions about geometric or algebraic vectors, use [coordinate-system] instead.

Filter by
Sorted by
Tagged with
0
votes
1answer
25 views

Finding the Euclidean distance between the vectors of matrix a, and vector b

Here is the problem, Given a 2D numpy array 'a' of sizes n×m and a 1D numpy array 'b' of size m. You need to find the distance(Euclidean) of the 'b' vector from the rows of the 'a' matrix. Fill the ...
-3
votes
0answers
18 views

vector out of range exception in my code [closed]

I am writing a C++ code for some Monte Carlo simulations. In the simulations, I am storing matrices and updating them based on some rules. So to do this, I created two classes : a 5D matrix class, and ...
2
votes
2answers
95 views

Find neighbours of a vector

To find neighbors of a vector and return array of Vectors which are neighbors of a Vector: ...
2
votes
1answer
50 views

Inserting multiple elements at known locations in a vector

Goal In the vector x, I would like to insert the elements of the vector values at indices stored in vector ...
5
votes
2answers
89 views

Compressing a vector into a specific range

I want to solve the following task --- I am given a vector of integers. I want to 'compress' this list, where the elements will be replaced with numbers 0 through <...
4
votes
4answers
914 views

Given two vectors of ints, determine whether one vector is a prefix of the other

Given two vectors of ints, write a program to determine whether one vector is a prefix of the other. For vectors of unequal length, compare the number of elements of the smaller vector. For example, ...
0
votes
0answers
29 views

A batch_recursive_count_if Function with Unwrap Level for Various Type Arbitrary Nested Iterable Implementation in C++

This is a follow-up question for A recursive_count_if Function For Various Type Arbitrary Nested Iterable Implementation in C++ and A recursive_count_if Function with Unwrap Level for Various Type ...
0
votes
0answers
10 views

Extracting integers from arbitrary text and storing them in a dynamic array

Minimal vector-like dynamic arrays, min_array.h. This is not new at all, but since I use a lot of functions similar to this in larger projects, I was hoping for ...
2
votes
1answer
70 views

C - Generic vector library

I'm quite new to C, and I decided to create a generic vector library. Here is the code: ...
8
votes
2answers
135 views

re-implementation of std::vector

I've implemented a simple vector-like structure. I would appreciate all criticism relevant to code. I have also published code under github. Here is the link to source code + unit test for most ...
8
votes
3answers
930 views

C++ Creating custom vector

I am new to C++ and Data structures, so I have started writing a custom vector as a practice. Please provide critique and advice. I know it is quite long, so thank you very much in advance. I just ...
2
votes
1answer
106 views

std::vector Allocator-Aware Implementation

I've just finally finished implementing std::vector. I'm currently re-implementing whatever I can in the hope to learn more of how data structures works. I tried to ...
0
votes
1answer
66 views

Find a sum using just two different digits

The problem statement was pretty easy and I was able to run half of the test cases, but some of the test cases in the end gave me the error of memory limit reached. What can I do here to improve the ...
4
votes
2answers
82 views

Implementing dynamic array without STL

For my game engine that I'm trying to write without using STL I implemented dynamic array class(some kind of std::vector). I would like to know whether this code suits best practices. I'm also not ...
1
vote
1answer
97 views

Vector Implementation C++ using RAII

I have attempted to implement a similar version of the STL Vector; several functions are missing but I'd like a few words of advice on whether I am indeed on the right track or whether I should change ...
4
votes
1answer
95 views

C++ multi-threaded determination of curling numbers in vectors

for a thesis I am creating a program that constructs curling sequences. The curling number of a sequence is defined as 'the largest frequency of any period at the end of the sequence'. (For example, ...
4
votes
1answer
347 views

Implementation of the std::vector class

Looking forward to get your feedback on my attempt to replicate vector class functionality. Especially I have doubts about copy constructor and resize methods. I think that copy constructor could ...
5
votes
1answer
60 views

Handle (“potentially” occuring) scalar-Vector and Vector-Vector operations [closed]

I'm looking into fixing some obvious performance-related issues in my code but I tend to employ bug-introducing tricks as I do so. My code uses a library which defines ...
1
vote
1answer
28 views

Cutting continuous variable into predefined blocks with custom labels

Background The function makes use of cut function offered in R's base package in order to "bin" a numeric vector into provided categories and apply, ...
0
votes
0answers
39 views

Seeking ideas for better efficiently deleting an element in a vector

While experimenting with some algorithm I decided to simulate it in R. I have a number of chronological elements in an array, and I want to prevent unlimited growth as new samples are added. So I ...
4
votes
1answer
78 views

C++ Dynamic Array Class Testing

I'm creating a basic Dynamic Array class in C++, and I'd like to know if there are any bugs/memory leaks I haven't noticed yet. dyn_arr.h : ...
3
votes
1answer
82 views

Find lowest consecutive value

I have created a program where I first set the size of the array and how many times I will look for consecutive values, then I fill in the array and finally I insert the consecutive values, it should ...
1
vote
1answer
376 views

Filtering a Vec of structs and creating new vector of Strings or strs in Rust

I'm working through the Rust book, and it has the following example of how to use the filter method on Iterators (source): ...
-1
votes
1answer
75 views

Push_back algorithm for Vector

Hello everyone! I wrote a class Vector.So, I want to find out how can i upgrade it for better performance of my vector. Here is the code: ...
0
votes
1answer
52 views

Implementation of a vector of pairs

In a personal project I was working on, I had a vector of std::vector< std::pair<unsigned,char>>'s that represented a character and its position in the ...
2
votes
1answer
73 views

Large-scale pairwise similarity calculations of vectors

I am a C++ beginner and am working on a bit of code which calculates the pairwise cosine similarities between vectors. The vectors are TF-IDF vectors and the similarities are used to determine ...
2
votes
0answers
24 views

JDS - Cuda implementation

I am trying to implement the Jagged Diagonal Storage code in Cuda for Sparse Matrix - Vector multiplication. The code I wrote is as follows but I'm not sure about it: ...
3
votes
1answer
76 views

Linear Interpolation for sorted arrays

I have made a linear interpolation functions as a side project of mine. It assumes everything is sorted before hand - x and f(x) are the same length. I would like to ask for: general recommendations ...
3
votes
0answers
145 views

std::vector<bool> workaround in C++

I've been trying to make an std::vector of boolean values and I got fed up with the specialization. To get around this, I made a wrapper class around ...
4
votes
4answers
1k views

std::vector implementation C++

I just started studying data structures and being the std::vector the container that I most use in C++ I decide to try to implement it mimicking its behavior the ...
3
votes
1answer
101 views

dumb::vector - a class for students to use when they are expressly forbidden from using std::vector

I have created a small library for use by beginner C++ students who are forbidden from using std::vector in their projects. Because of this, I would like you to ...
3
votes
2answers
112 views

Implementation of a Smart To-do List Algorithm

This is a small program to implement the FVP algorithm (outlined here). I'm still quite new to C++ and don't have a strong grasp of basically any concepts. Concepts I tried to use in this program: ...
9
votes
2answers
639 views

0/1 knapsack algorithm implementation with possibilities vector

The following code uses dynamic approach to solve 0/1 knapsack problem. (I know the maximum profit function I have used is not as good as the one I have defined ...
5
votes
2answers
227 views

A job sequencing solution

I have written this code as a college assignment fot the famous job sequencing problem. Please tell me any improvements if possible. Oh, for algorithms.h header ...
4
votes
2answers
103 views

What changes should I implement in my templated sorter class so that it performs efficiently?

I have a college assignment to implement a class called sorter, whose object is a sorted vector (the user is allowed to sort it by the method he/she desires). I have been able to implement it as ...
8
votes
3answers
1k views

Reverse each word in the string. All spaces in the string should be retained

This was part of a code challenge. I use them to help me learn c++/c# along with tutorials and guides. Basically I was taking a string... The quick brown fox jumps over the lazy dog. ...and ...
3
votes
2answers
171 views

Finding median of sub arrays taking too much time

I'm trying to solve a programming challenge where I have to find the median of given subarrays of an array. I have used std::vector's ...
2
votes
2answers
129 views

Dynamic array class in c++

So, as an exercise I wanted to write a dynamic array, like std::vector. I wanted to know if there are any things that could be done better or anything I did wrong. Thank you! ...
2
votes
2answers
241 views

Sorting multiple vectors based on a reference vector

I am trying to sort vectors based on a reference vector. First I am getting the indexes for the reference vector and then using that I am doing inplace sorting for the rest of the vectors. ...
5
votes
1answer
97 views

Pointers to polymorphic classes saved in vector that reference data in a list as source

I have a list called data with strings in it. I have a class String that derives from class Item. A class ...
2
votes
2answers
108 views

A simple 3D Wrapper class around std::vector

I am working on a very simple 3D vector class, which I can use to set up and access three-dimensional vectors using a wrapper around std::vector. It's not intended to be foolproof, just good enough to ...
-2
votes
1answer
61 views

Writing array to vector slows down program after each iteration [closed]

I have a C++ program where the input are 2 arrays, each containing a and z number of elements. The program then creates all ...
9
votes
2answers
425 views

Proper Case Conversion (Performance)

I wrote a simple function that converts an array of words into proper case (using bitwise operations) and returns the array. I performed a simple test using ...
3
votes
0answers
65 views

Program to output Low and High pass filter impulse response coefficients for signal processing

My issue that I was trying to solve was constructing a vector where the values were mirrored around the central element. The problem is here: https://stackoverflow.com/questions/58876916/construct-...
2
votes
0answers
39 views

Using python to estimate the range of unstructured data

I have unstructured input-output data, f=f(x). I want to estimate the range of f as a function of x, given limited sampled. So, I tried to discretize the data use small bins in x to estimate the ...
2
votes
2answers
337 views

Operator overloading in C++ to manage playlists of music

I've built this little C++ program just to take some rust off my coding skills since it's been ages since the last time I coded something. The purpose is to organize my music, so I've built the ...
2
votes
1answer
51 views

Find all palindromes in the danish language

I made a program to attempt to find all palindromes in the danish language. Words.txt contains about 50.000 lines of danish words. Palindromes.txt is empty initially. Im running the program on a ...
6
votes
3answers
618 views

constexpr SmallVector - std::vector like container on the stack

2 years ago I did this: SmallVector - std::vector like container on the stack now, 2 years later, I am reinventing the wheel again, this time with fully constexpr SmallVector. This time, because I ...
6
votes
2answers
1k views

Algorithm that generates orthogonal vectors: C++ implementation

Recently I asked the similar question, but the algorithm was implemented in Python. Now I've tried to implement the same algorithm, but in C++ (I'm very new to it): ...
16
votes
2answers
289 views

YAVI (Yet another vector implementation)

I am a C# game developer currently learning C++. I am trying to implement some simplified STL containers. Here is my implementation of vector, which does not have the allocator (because ...

1
2 3 4 5 6