Finding the index (rank) of a specific number from a column

Suppose I have a column B = [ 1 4 8 3 5 9]

and I have another vector = [ 8]

In this case, I want to find the rank where it's matched in the vector which should return a value of 3 (3rd). How do I do that ?

[madhan ravi]

why do you say it returns 3?

[Abbi Hashem]

if you look at the vector , the 1st value is 4 , second is 4 , third is 8 ... the "3 " as in third value is what I want to obain

[madhan ravi]

I got confused because you said rank so you mean index

Answer 1

[Walter Roberson]

[~, idx] = ismember(8, B)

[Abbi Hashem]

What is idx ?

Also, I forgot that the "other vector" is not a vector but just a variable, does this change the code ?

[Walter Roberson]

just_a_variable = 8;
[~, rank_that_you_are_looking_for_this_is_the_result_that_you_want] = ismember(just_a_variable, B);

[Abbi Hashem]

thanks