Finding 4 closest values to a value in an array

How do I find multiple points close to a particular number in an array? I can do this for one value but how do I extend that?

Answer 1

[Sindar]

use mink

[~,idx] = mink(abs(data-find_point),5);
data(idx)

[AAS]

Hi, Thankyou! How can I extend this to select maybe two values above and below the value I want?

[Sindar]

You'd play around with (data-find_point) without the abs(). Algorithm something like:

• separate data into values equal to, larger than, smaller than find_point
• keep all equal to
• find smallest 2 positive error
• find largest 2 negative error