Deleting rows with specific values within a matrix

Here is the given question:

Create a matrix, A, of dimension of random integers in the range . Now create a new matrix from A by removing any rows that contains either -10, 0, 10.

I have create the random matrix

A = randi([-10, 10], [7,12])

Despite looking online, I am yet to find anything similar.

Thanks for the help.

[Jan]

This sounds like a homework question. Then please post, what you have tried so far and ask a specific question. It is not useful, if the forum solves your homework.

[Lewis Abrams]

I do mention it is a given question.

I am not asking for it to be solved, I would like to know how to work it out. Any ideas on what to use or how to think about it would be useful.

As Matt has done to help.

[Rena Berman]

(Answers Dev) Restored edit

[Matt J]

A record of the original question:

Here is the given question:

Create a matrix, A, of dimension of random integers in the range . Now create a new matrix from A by removing any rows that contains either -10, 0, 10.

I have create the random matrix

A = randi([-10, 10], [7,12])

Despite looking online, I am yet to find anything similar.

Thanks for the help.

Answer 1

[Matt J]

Hint: do something with this line:

ind = any( A==0 | abs(A)==10 ,2)

[Lewis Abrams]

Thank you Matt, I am relatively new to the software.

What is the purporse of the ind and abs in this line. I have looked up their uses on the MATLAB help section but still need help understaning. I see that running this line allows me to see which rows have one of the factors, and which ones do not.

Using:

A = randi([-10,10], [7,12])
ind = any( A==0 | abs(A)==10 ,2)
out=A(ind,:)

I am able to remove the rows not containing the stated figures. Is there a way to reverse this>

Thanks again.

[Matt J]

abs() is absolute value.

c=abs([-10, 10])

c = 1×2

10 10

The line I've shown you really is by far the hardest part. If you don't know what to do from here, I think you need to review the Matlab on-ramp material.