# find if two numbers are BOTH present in an array

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suleiman abdullahi on 30 Jun 2019
Commented: Steven Lord on 30 Jun 2019
Hello everybody,
Given 2 numbers p and q and a vector v, the question is, are BOTH elements in v?
by defining a function with both numbers p,q and vector v as input and the answer to above question being (either yes or no), the only allowed matlab routine is 'length' and only one loop can be used. the function needs to be tested.
function [logica] = find(p,q,v)
for k = 1:length(v)
if v(k)==p || v(k)==q
logic = yes
else
logic = No
end
end
but this will only show either p or q is present and not both of them are present
Thanks.

#### 1 Comment

Steven Lord on 30 Jun 2019
You should not call your function find. That already has a meaning in MATLAB.
You said "the only allowed matlab routine is 'length' " but that's not true. You're using ==, ||, and probably true and false in addition to length. Since this sounds like a homework assignment, you probably want to clarify with your professor or teaching assistant specifically what's not allowed. I'm guessing they didn't want you to simply call ismember.

KALYAN ACHARJYA on 30 Jun 2019
Edited: KALYAN ACHARJYA on 30 Jun 2019
Original question:
A=[2 3 7 9 8; 9 2 4 1 0];
find if two numbers are BOTH present in an array, let 3 and 9 . the result like yes=1.
y=find(A==3) & find(A==9);
if y==1
disp('Yes');
else
disp('No')
end

suleiman abdullahi on 30 Jun 2019
thank for the help, i have rephrased the quesition.
KALYAN ACHARJYA on 30 Jun 2019