i have a matrix A(25357*2), i want to delete rows as i explained below. any help?

In the attachced excel sheet above,

Some rows starts with 1(40rows),some rows starts with 2(58rows), some rows starts with 3(55rows) and so on....

if we consider rows starting with 1, the corresponding 40 column values

6

42

50

55

57

62

83

107

148

157

186

211

213

245

261

282

284

333

429

471

490

506

537

549

551

590

659

693

698

763

769

778

782

794

797

876

881

965

970

991

so if we consider the above values, i want to delete rows starting with 6,42,50,55,57,........991 from matrix A

since value 2 is not there in the list , rows starting with 2 should not be deleted, now again consider 58 rows starting with 2, the rows starting with these 58 column values should be deleted.

next rows starting with three and rows starting with these 55 column values should be deleted.

and so on....

when it comes rows starting with 6are already deleted in the first operation.so it should start with rows starting with 7.

and whole process should continue..

Answer 1

[Raghav Singhal]

Hi,

You can try using logical vectors if it helps resolve your query. You can refer to the documentation link below for more details

https://www.mathworks.com/help/matlab/matlab_prog/find-array-elements-that-meet-a-condition.html