extracting the nth multiple rows of a large matrix to create a submatrix

Hi. Please i have a large matrix a=(1290 x 2) and i want to extract rows in multiple of 5 to create a new matrix. For example, a new matrix x, should be made of, the 5th row,10th row,15th row and so on, of matrix a. Please help me, I am new to MATLAB. Thanks

Answer 1

[madhan ravi]

Simpler and easier:

x = a(5:5:end,:)  % edited after all the comments

[Stephen23]

Simpler to use end:

a(5:5:end,:)

[madhan ravi]

Thank you!

[Image Analyst]

And (should be obvious, but evidently she's a beginner), to create the x she asked for:

x = a(5:5:end,:)

[madhan ravi]

Thank you sir Image Analyst!

Answer 2

[Kevin Chng]

try, let say a is your matrix(1290x2)

a(1:5:1290,:)

[MIRABEL ACQUAH]

Thanks a lot.

[Stephen23]

This answer does not select the requested rows:

1:5:1290

ans = 1×258

1 6 11 16 21 26 31 36 41 46 51 56 61 66 71 76 81 86 91 96 101 106 111 116 121 126 131 136 141 146