How to convert matrix to vector in C#, and sort vector

Question

1.00/5 (1 vote)

See more:

I have a 40x60 matrix containing pixel values. I want to convert that to a 1-D vector and then sort those values.

In C++ I believe I would use the std:vector library, but I am unsure what library or method to use in C#.

I am a beginner to C# and would greatly appreciate any advice/tips. Thank you!

Posted 28-Feb-12 9:44am

Member 8685652

Add a Solution

Comments

Sergey Alexandrovich Kryukov 28-Feb-12 15:47pm

First, this is not a question.
Second, "convert" is not a correct term. Not just formally: you have two different structures, say double[,] or double[][] and double[]. What's the required mapping between them? It's neither "default" nor "assumed".
--SA

2 solutions

Solution 2

Let's assume you have an element type T (actually int, double or something).

A matrix can be represented as T[,]. The size would be fixed at the moment of initialization. This is the most adequate for a fixed-dimension matrix.

For jagged, you would use T[][] (array of arrays), and, for fully supported insertion or deletion on the fly, it could be System.Collections.Generic.List<System.Collections.Generic.List<T>>. I don't think you need it for this task.

For a vector, you need just the array T[], because at by the moment of calculation, the dimension is known from the dimensions of the source matrix. If by some reason you need a vector, this would be System.Collections.Generic.List<T>>.

Good luck,

—SA

Posted 28-Feb-12 10:38am

Sergey Alexandrovich Kryukov

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

lewax00 · Accepted Answer · 2012-02-28T10:24:00

Create a new list, iterate through your matrix and add all the values to the list, then call list.Sort()

Something like:

C#

List<int> pixelValues = new List<int>();

/* iterate through your matrix and add each value with pixelValues.add(value) */

pixelValues.Sort();

Best I can come up with using the provided information. You'll want to replace int with whatever type you're storing in your matrix, and I'm not sure what the matrix's structure looks like but I'm guessing you know how to iterate through it.

If you need something other than the default comparison there are overloads of Sort available, see the MSDN page for List[^].