Problem 72. Interpolator

Created by Cody Team

Solve Later

You have a two vectors, a and b. They are monotonic and the same length. Given a value, va, where va is between a(1) and a(end), find the a(n) and a(n+1) that flank it. Now interpolate the value, vb, such that it is proportionally between b(n) and b(n+1).
Note that va can land exactly on a value of a as well.

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Last Solution submitted on Dec 08, 2025

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J.R.! Menzinger on 29 Oct 2012

WTF!
I know the function interp!! but I thougth I must program it... :-(

David Verrelli on 25 Sep 2017

That's true, the instructions here do indicate that you're supposed to program it from scratch (e.g. find a(n) & a(n+1)).

E Chang on 17 Aug 2018

For convenience, it would be useful if the code input variables were related to the variables listed in the solution window. We are given a, b, alpha, and beta in the Test Suite; the function that we are to type involves vb, va, a, and b. Sure, we can update it, but it just seems careless.

Lucas Ali on 6 Jul 2021

This is my first solving problem

Xuechen Xie on 10 Nov 2021

First find the position then finding the gap length between arrays.

Dianne Valera on 26 Apr 2022

enjoyed this problem!

Peter Orthmann on 3 Oct 2022

The tests do not check va equal to a(1) or a(n).

Dyuman Joshi on 4 Oct 2022

Test cases added to include for corner values as well.

Cláudio Márcio on 7 Apr 2024

The test is broken. The question statements gives that "va" is between a(1) and a(end), but the last test gave va = a(1).

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Problem 72. Interpolator

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Problem 72. Interpolator

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