Count number of elements in a matrix more or less than given numbers

I want to count number of elements in the 2nd column of a matrix more or less than given numbers x and y.

For example, In the matrix A, x=20 and y=10.Thus the count of numbers >20 and <10 (i.e not between 10 to 20) is 5

A =

1 23

2 9

3 55

4 78

5 16

6 11

7 1

How to construct this code?

Answer 1

[Kevin Phung]

x = 10;
y = 20;
sum(A(:,2)<x | A(:,2)>y)

[Meg Cullen]

Thank you :)

Answer 2

[Sulaymon Eshkabilov]

Hi Meg,

Here are two simple solutions to your problem:

% Given matrix:
A =[ 1    23;
     2     9;
     3    55;
     4    78;
     5    16;
     6    11;
     7     1];
  %% 1- way
 Anew = A(:,2);
 Index1 = find(Anew<10); Index2 = find(Anew>20);
 Number1  = numel(Index1)+numel(Index2);
 %% 2- way
 Number2 = numel(find(A(:,2)<10))+numel(find(A(:,2)>20));
 
 

Good luck.

Answer 3

[Keshav Anirudh]

How to do that for the entire matrix, if you wanna find the for a matrix