Indexing II

Curated by : goc3

Average Problem Difficulty:

More problems that require operating on a subset of elements from a vector or matrix. 

Indexing II Master

+50 points

Problem Title	Likes	Solvers
Problem 645. Getting the indices from a vector Created by: Doug Hull Tags indexing, basic matlab, ml101	64	10331
Problem 1451. Symmetry of vector Created by: Selvaraaju Murugesan Tags basic matlab	10	1085
Problem 1632. Calculate the Number of Sign Changes in a Row Vector (No Element Is Zero) Created by: Shahid Ali Murtza Tags sign changes	10	763
Problem 1678. Count consecutive 0's in between values of 1 Created by: Chris E. Tags consuctive 0's, counting 0	11	451
Problem 1699. Find last zero for each column Created by: Matthew Eicholtz Tags indexing, matrix manipulation	10	589
Problem 1779. Oh Zero Zero Zero!!! Created by: Chris E. Tags sequences, pattern match, pattern finding	15	456
Problem 1786. Create an index-powered vector Created by: Swapnali Gujar Tags indexing, power, vector power	7	806
Problem 1927. Find nth maximum Created by: Awadhesh Srivastava Tags number theory, n th max	6	830
Problem 1940. Decimation - Optimized for speed Created by: James Tags speed optimization, carnage maximus, efficiency	9	182
Problem 980. Unique values without using UNIQUE function Created by: Aurelien Queffurust Tags unique, stable	3	371
Problem 1035. Generate a vector like 1,2,2,3,3,3,4,4,4,4 Created by: Binbin Qi Tags zeros, for, ones	129	11943
Problem 1430. Create an n-by-n null matrix and fill with ones certain positions Created by: Daniel Pereira Tags indexing, matrix, sparse	8	630
Problem 1401. Implement a bubble sort technique and output the number of swaps required Created by: Robert Weinberg Tags sort, bubble sort, bubblesort	9	319
Problem 888. Create a vector whose elements depend on the previous element Created by: Aurelien Queffurust Tags vectorization	7	710
Problem 972. Set a diagonal Created by: Nicholas Howe Tags indexing, diagonals	6	298
Problem 1038. Change the sign of even index entries of the reversed vector Created by: Selvaraaju Murugesan Tags vectors, qmf	5	573
Problem 1092. Decimation Created by: James Tags decimate, there can be only one, carnage maximus	19	258
Problem 1193. Insert zeros into vector Created by: Selvaraaju Murugesan Tags basic matlab	7	811
Problem 1203. Reference Index Number Created by: Nicholas Howe Tags indexing	3	266
Problem 1229. Determine the number of odd integers in a vector Created by: Jeremy Tags matlab, vector, matrix	6	754
Problem 1273. Max index of 3D array Created by: Youssef Khmou Tags maximum	9	375
Problem 1366. Finding peaks Created by: Selvaraaju Murugesan Tags basic matlab	10	420

FEATURED DISCUSSION

Primes and Rough Numbers, Basic ideas

What is a rough number? What can they be used...

John D'Errico in Tips & Tricks

View Post

Recent Group Finishers158

Recent Activity

	Riccardo G. submitted Solution 14568234 to Problem 1430. Create an n-by-n null matrix and fill with ones certain positions 22 hours and 24 minutes ago
	Daniel submitted Solution 14567588 to Problem 645. Getting the indices from a vector on 5 Mar 2025 at 5:52
	俊航 submitted Solution 14566371 to Problem 645. Getting the indices from a vector on 4 Mar 2025 at 7:19
	俊航 submitted Solution 14566320 to Problem 1035. Generate a vector like 1,2,2,3,3,3,4,4,4,4 on 4 Mar 2025 at 6:46
	Jenny submitted Solution 14566101 to Problem 1451. Symmetry of vector on 4 Mar 2025 at 5:26

Community Treasure Hunt

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

Start Hunting!