Solved
Where the Four Corners Am I?
The "Four Corners" region of the US is where Colorado, Utah, Arizona, and New Mexico all meet - the only place where four states...
3 years ago
Solved
Generate Pascal's Triangle Matrix
Pascal's triangle is an arrangement of numbers where each value is the sum of the values adjacent to it in the previous row: ...
3 years ago
Solved
Jack O'Lantern
If visualized correctly, the data contained in the matrix A will look like a jack-o'-lantern. Create a function that will visu...
3 years ago
Solved
Plotting Practice
Plot cos(x) vs x as shown in the figure below. Include the appropriate title, x-label, and y-label. Note, it is case sensitive. ...
3 years ago
Solved
Calculating Student Grades
The matrix grades contains raw grades for 7 students who took your course. Each row represents a different student. The first 7 ...
3 years ago
Solved
Matrix Quadrants
Write a function that takes N as the input, and outputs a matrix whose upper-left (NxN) quadrant contains all ones, the lower-ri...
3 years ago
Solved
Find the minimum of the column-maximums of a matrix
Given a matrix A, find the maximum value of each column, then return the smallest of those maximum values (ie return the minimum...
3 years ago
Solved
Find Closest Constant
Given a number x, return the value that is closest to x from this list of constants: 0, 1, , e, , (also known as ). For exampl...
3 years ago
Published
Contests, Contests!
Here in New England, autumn is in full swing. The maple leaves are shifting into their best yellows and reds. On MATLAB...
3 years ago
Solved
Create an arrow matrix
An arrow matrix is a square matrix that contains ones on the diagonal, the last column, and last row. ...
3 years ago
Published
New Features: How Do You Find the Good Stuff?
If I give you something but you never get the news, did I really give it to you? This happens all the time with MATLAB...
3 years ago
Solved
Find a Pythagorean triple
Given four different positive numbers, a, b, c and d, provided in increasing order: a < b < c < d, find if any three of them com...
3 years ago
Published
Home Made Magnetic Resonance Imaging
Listen in as Yuki Kamatani interviews a man who built his own MRI! Hi, I'm Yuki Kamatani, an application engineer in our...
3 years ago
Solved
Given a matrix, swap the 2nd & 3rd columns
If a = [1 2 3 4; 1 2 3 4; 1 2 3 4; 1 2 3 4]; then the result is ans = 1 3 2 4 1 3 2...
3 years ago
Published
Publishing to WordPress
This blog post began its life as a Live Script in MATLAB. I could have started typing into WordPress, but then I wouldn't...
4 years ago
Solved
Find the complement of a number in binary
Input x is a decimal number and output y is the complement of binary representation of x. For example, x = 10 has the binary ...
4 years ago
Published
Happy Valentines Day!
I found this lovely algorithmic heart in the comments of an old Walking Randomly post. Research software superstar Mike...
4 years ago
Published
Community Q&A – Yair Altman
Yair Altman is a top participant on MATLAB Central, especially within File Exchange. He is best known for being the...
4 years ago
Published
Dr. Maeda Wins With MATLAB!
Some people say it's hard to make predictions. Not true. But making accurate predictions... okay, that's hard. Even so,...
4 years ago
Published
Tips ‘n’ Tricks with Chris Armstrong of BAE Systems
As part of my business travel over the years, I've been fortunate to visit the UK several times and meet folks from BAE...
4 years ago
Solved
Replace Nonzero Numbers with 1
Given the matrix x, return the matrix y with non zero elements replaced with 1. Example: Input x = [ 1 2 0 0 0 ...
4 years ago
Solved
subtract central cross
Given an n-by-n square matrix, where n is an odd number, return the matrix without the central row and the central column.
4 years ago
Published
Mini Hack Contest Analysis
Today we have a guest post from Dave Bulkin. Dave is a developer on the MATLAB Graphics and Charting Team. Dave used to be...
4 years ago
Published
Flying Pumpkins, Dancing Pumpkins
Eric Ludlam likes pumpkins. That might surprise you when you see what he does to them. Example: give him a perfectly good...
4 years ago
Published
Call to Action: Look, then Vote! (and Give to Charity)
Something special is going on. Look at all these images. You're looking at 96 images from the ongoing Mini Hack...
4 years ago
Published
Twenty: A Birthday, a Contest, an Explosion of Images
As I said in my last post, here at the MathWorks Community blog we are currently celebrating an important milestone:...
4 years ago
Published
And Now We Are 20
It’s been twenty years since we launched MATLAB Central. It's tempting to say that it’s been twenty years since we started...
4 years ago
Solved
Rotate a Matrix
Input a Matrix x, Output y is the matrix rotating x 90 degrees clockwise
4 years ago