Discover MakerZone

MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi

Learn more

Discover what MATLAB® can do for your career.

Opportunities for recent engineering grads.

Apply Today

Problem 676. Reindex a vector

Created by James

You are given two vectors of equal length. Vector N has numeric values (no Inf or NaN) while vector IDX has integers. Place the numerical values in a vector N in the output vector y at indices IDX. All other values in the output vector should be zero. For example:

N = [1 3 2 7];

IDX= [2 3 4 6];

y_correct = [0 1 3 2 0 7];

N(1) goes into y at IDX(1). N(2) goes into y at IDX(2), and so on...

If N is a row vector, your output should be a row vector. If N is a column vector, your output should be a column vector.

Good luck!

Problem Group

Solution Statistics

113 correct solutions 135 incorrect solutions
Last solution submitted on Aug 23, 2014