How can I solve matrix selection extraction

Hello, I am a college student studying MATLAB.

I want to select columns 1-101, columns 103-203, 205-305, and columns 307-407 among the attached 309×816 matrices and make them into one matrix.

How can i solve it. Please let me know.

thank you

[KSSV]

Read about indexing in MATLAB.

Answer 1

[Chunru]

load C.mat

% select columns 1-101, columns 103-203, 205-305, and columns 307-407 
% and make them into one matrix.

WhatYouWant = C(:, [1:101 103:203 205:305 307:407]);
% The : means all rows; [....] means the selected columns

whos

  Name               Size               Bytes  Class     Attributes

  C                309x816            2017152  double              
  WhatYouWant      309x404             998688  double              
  ans                1x30                  60  char                
  cmdout             1x33                  66  char                

Answer 2

[AMIT POTE]

You can go through the following documentation to understand indexing in MATLAB

Array Indexing - MATLAB & Simulink (mathworks.com)

Matrix Indexing in MATLAB - MATLAB & Simulink (mathworks.com)

Answer 3

[Neeraj Mirji]

The following code extracts the mentioned columns into newMatrix.

newMatrix = C(: , [1:101 103:203 205:305 307:407]);

Check out Matrix Indexing documentation of better understanding.