How to return values mapped to a variable?

Hello, (I modify my answer) you can just search/find indexes based on values of a_prime by using the following indexation method : a_prime_val=a(a_prime); c=b(b==a_prime_val(:)); % you will get a vector of the occurences of a_prime_val within b. i hope it answers your questions.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

Answer 2

Dyuman Joshi 2022-6-25

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1747985-how-to-return-values-mapped-to-a-variable#answer_993270

编辑：Dyuman Joshi 2022-6-25

在 MATLAB Online 中打开

Not sure what you want exaclty

a = [1 2 3 4 5 6 7 8 9 10];
b = [4 5 12 45 21 52 69 10 22 0];
a_temp = isprime(a)
a_temp = 1×10 logical array
   0   1   1   0   1   0   1   0   0   0
b_temp = b(a_temp)
b_temp = 1×4
     5    12    21    69

2 个评论
显示无隐藏无

Soufian MELLAHI 2022-6-25

Your answer provides values in b bases on prime numbers indexes in a but no equivalent with occurences of the same prime numbers in b. It depends on the real need. If he needs the prime numbers as same as present in b which is more logical. we need to remap the indexes as i have done in my answer. Otherwise your answer seems fitting.

Image Analyst 2022-6-25

@Soufian MELLAHI he gave him exactly what he asked for. But we all know that what a poster asks for is not always what they mean. If it's not what he intended, then perhaps the original poster can clarify what's needed. And say if it's homework or not.

By the way, can you transfer your Answer from the above comment section to down here in the official Answer section so you might get credit for it if he accepts your answer? Thanks in advance. 🙂

请先登录，再进行评论。