How do I find the even and odd elements in a vector?

I'm a student learning MATLAB and am just beginning. I have the following problem to answer:

Generate a vector of 20 random integers, each in the range from 50 to 100. Create a variable "evens" that stores all of the even numbers from the vector, and a variable "odds" that stores the odd numbers.

I created the vector of 20 random integers and named it myvec, but I have tried so many different expressions and cannot seem to find a way to find the even numbers and the odd numbers.

I've tried:

find(myvec==even)

find(myvec==odd)

find(myvec==[50:2:100])

find(myvec=[51:2:99])

None of these work, so can anyone please help?

[Mohamad karimi]

find(mod(myvec,2)==0)

[Jan]

Usually you can omit the find() and use the faster linear indexing.

Answer 1

[Youssef Khmou]

hi Paul,

thats good as you created random 50,100, that first step is important,

odd and even are related to Modulus, even modulus 2 is zero :

 T=round(100*rand(20,1));
 evens=T(mod(T,2)==0);
 odds=T(mod(T,2)~=0);

[Paul]

Thank you, that worked for me, however, we haven't learned the "mod" function yet, so is there another method that would work using the "find" function?

[Jan]

FIND has a very different job. The argument, that you have not learned MOD is not powerful: As long as you do not provide a list of command, which you have learned already, we can offer efficiently working solutions only.

It is easy to learn how to use the MOD command:

doc mod

[Priyanka Marudhavanan]

how to display the cell labels in matlab

[Image Analyst]

@Priyanka Marudhavanan, you forgot to give an example of exactly what you want, like do you want to use fprintf() to run along the array printing to the command window. Or do you want to construct a cell array with the words "even" and "odd" in it? Please clarify. Show us what you want.

Answer 2

[Azzi Abdelmalek]

Edit

a=randi([50 100],1,20)
evens=a(mod(a,2)==0)
odds=a(mod(a,2)==1)

[Azzi Abdelmalek]

Look at Edit

Answer 3

[Jan]

Because this is obviously a homework, it would be a good idea to show us, what you have tried so far. "Even" means, that the value can be divided by 2 such that the result has an integer value. While this is exactly what mod(x, 2) does, you can formulate it in many different ways. Perhaps divide by 2, round(), multiply by 2 and compare with the input.

Answer 4

[Korede Akinpelumi]

function [evens,odds]=assignm

A=randi(51,1,20)+49;

B=50:2:100;

C=51:2:99;

evens=intersect(A,B);

odds=intersect(A,C);

end

Answer 5

[Ashok Kumar]

Write a code to get one value from user and a. Print the multiplication table for that value in a proper format b. Check whether the given number is odd or even and display it