Creating a matrix index

5 views (last 30 days)
Edward Johnsen on 3 Sep 2018
I have a 10 by 1 matrix of numbers between 1 and 10, lets call it Z. I want to create a matrix, where say it is 5 by 10, where it takes the number from the first row in Z, say 5, and then creates a row in the new 5 by 10 matrix where the first row would be 0 0 0 0 1 0 0 0 0 0 , basically placing a 1 in the column dictated by the number from the Z matrix, can anyone help me?
Cheers, Edward
KALYAN ACHARJYA on 3 Sep 2018
Explain: Consider a Matrix as an example and what result you are expecting?

Edited: Cesar Antonio Lopez Segura on 3 Sep 2018
Hi Edward,
Z = [ 5,1,3,6,7,8,9,10,4,6]';
size(Z) % check matrix size
Matrix5by10 = zeros(5,10); % create a zero matrix
Matrix5by10( 1,Z( 1 ) ) = 1 % write matrix 5 by 10 been Z a colum indicator
If you need a loop, here you can find the solution:
% Iterative example
for i = 1:5; Matrix5by10( i ,Z( i ) ) = 1; end; Matrix5by10

Categories

Find more on Matrix Indexing in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by