create a vector of all the odds positive integers smaller than 100 in increasing order to save it into a variable

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andres psijas 2020-4-3

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回答： Pratheeksha 2024-7-2

Hi im new student in matlab, i try to do this exercise but i dont understand the thing size, the test asking me for a size [1 50] and say is currently [1 99], the code i wrote was:

odds = 1:1:99

thank you

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Michael Hawks 2020-4-3

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You were close. You just need to change one digit from your command to look like this:

odds = [1:2:99]

The '2' in the 2nd position there tells Matlab to skip some numbers, keeping only every 2nd digit.

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andres psijas 2020-4-3

thank you very much

Rik 2020-4-3

编辑：Rik 2020-4-3

Since this is a homework question it is generally not a good idea to give complete working solutions. You can keep this answer now as it is, as Andres probably got an email notification with the contents of your answer.

The general consensus is to teach people how to solve their homework with the available tools (Matlab itself (trial and error), the documentation, Google, and their brains). Understanding questions and learning how to solve them is a real skill, it takes time to learn.

Also, the brackets are not needed. The colon operator already returns a vector, you don't need the brackets to make it a vector again. You will also notice mlint is giving you a warning to that effect (the orange squiggle).

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Mayuresh Chawde 2020-5-24

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That was so tricky questions in assignments you have to be very thougro with pratica online lectures for second that is for even you need to put vector in decreasing order just like that -

evens = 100:-2::1

there you go. You solved it easily

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Walter Roberson 2020-5-24

you would not want :: in that expression

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D Deepak 2021-5-26

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编辑：Rik 2021-9-30

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j=1;
k=1;
for i=1:100
   if mod(i,2)==0 && i~=1
       even(j)=i;
       j=j+1;
   else
       odd(k)=i;
       k=k+1;
   end
end

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Rik 2021-5-26

Why the &&i~=1 part? Why are you dynamically growing arrays? Why didn't you comment your code?

And why are you posting a solution to a homework assignment? And why didn't you format it as code?

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N/A 2023-3-14

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移动：Image Analyst 2023-3-14

odds = 1:2:100 % create odd from 1 to 100

evens = 100:-2:2 % create evens from 0:99

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Image Analyst 2023-3-14

在 MATLAB Online 中打开

I don't see where the original poster said anything about evens, or the order of the evens. But anyway, I think you meant

evens = 2 : 2 : 100; % Create vector of even numbers from 2 : 100, OR...
evens = 100 : -2 : 2; % Create vector of even numbers from 100 to 2 in reverse order.

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