CODEWITHSUNDEEP
matlab
Mukul Jindal
Mukul Jindal

Reputation: 1

I need to eliminate alternate rows of an array

I need to eliminate alternate rows of an array, like i have an array of 23847X1 and i need the odd rows and finally making it into 11924X1. It is in .mat file and i want the resultant in the .mat file as well.

Upvotes: 0

Views: 1417

Answers (1)

aioobe
aioobe

Reputation: 420951

Try yourMatrix(1:2:size(yourMatrix, 2)).

The 1:2:N selects all elements from 1 to N with step 2.

A more complete example:

> M=[1, 2, 3, 4, 5, 6, 7]
M =

   1   2   3   4   5   6   7

> OddM = M(1:2:size(M, 2))
OddM =

   1   3   5   7

To load / store data in data.mat, follow H.Muster's advice below:

load('data.mat'); x = x(1:2:end,:); save('data.mat', 'x')

Upvotes: 3

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