How to Swap Column according to odd/even numbers?

Hi everyone, I would like to arrange my column according to odd and even numbers. Example data is shown below, I want to arrange column 1(even numbers) while column2 (odd numbers). Can anyone help me on how to arrange / swap into the according column.

nPASS1 nPASS166

nPASS1 nPASS64

nPASS101 nPASS12

nPASS101 nPASS88

nPASS103 nPASS166

nPASS103 nPASS90

nPASS114 nPASS229

nPASS114 nPASS51

nPASS12 nPASS127

[James Tursa]

Please post your desired output.

[hanif hamden]

Hi, my output would be like this...

nPASS166 nPASS1

nPASS64 nPASS1

nPASS12 nPASS101

nPASS88 nPASS101

nPASS166 nPASS103

nPASS90 nPASS103

nPASS114 nPASS229

nPASS114 nPASS51

nPASS12 nPASS127

It's just swapping the even numbers from column2 to column1..

[James Tursa]

How is this stored? Cell array of char strings? Array of strings? Or ...???

[hanif hamden]

This is how I read the data from textfile. I attached the file as well

clc; clear all;close all;

filename = 'XOpairs.txt';
fileID = fopen(filename);
C = textscan(fileID,'%s %s ');
fclose(fileID);

Answer 1

[KSSV]

This is basic in MATLAB. You should read about indexing an array.

Example:

A = rand (10.1);   % array for demo
E = A (2: 2: end);   % get even indices number
O = A (1: 2: end);   % GEt odd indices numbersY

You may also have cell arrays. For cell arrays you need to use {} for indexing.

[James Tursa]

This is not what OP asked.

[KSSV]

Let it be. If he is not satisfied, he will ask the question again. There is no harm right?