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Find the index of n in magic(n)
If input n=5, then magic(n) is 17 24 1 8 15 23 5 7 14 16 4 6 13 20 22...
3 years ago
Solved
Create an index-powered vector
Given a input vector x, return y as index-powered vector as shown below. Example x = [2 3 6 9] then y should be [...
3 years ago
Solved
Maximum value in a matrix
Find the maximum value in the given matrix. For example, if A = [1 2 3; 4 7 8; 0 9 1]; then the answer is 9.
3 years ago
Solved
Swap the input arguments
Write a two-input, two-output function that swaps its two input arguments. For example: [q,r] = swap(5,10) returns q = ...
3 years ago
Solved
Sum all integers from 1 to 2^n
Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.
3 years ago
Solved
Reverse the vector
Reverse the vector elements. Example: Input x = [1,2,3,4,5,6,7,8,9] Output y = [9,8,7,6,5,4,3,2,1]
3 years ago
Solved
Make a random, non-repeating vector.
This is a basic MATLAB operation. It is for instructional purposes. --- If you want to get a random permutation of integer...
3 years ago
Solved
Word Counting and Indexing
You are given a list of strings, each being a list of words divided by spaces. Break the strings into words, then return a maste...
3 years ago
Published
Using a pattern Object To Match URL Strings
12:25 I need to determine which URL strings in a big array match a certain pattern. Here I will use...
3 years ago
Published
Intervening to Save a Program Stuck in a Loop
4:57 Here, one of my MATLAB programs appears stuck in a loop. I don’t want to quit it, as I will lose...
3 years ago
Solved
MATLAB Counter
Write a function f = counter(x0,b) to construct a counter handle f that counts with an initial value x0 and a step size b. E...
3 years ago
Solved
Fix the last element of a cell array
Note: this is lifted directly from <http://www.mathworks.com/matlabcentral/answers/82825-puzzler-for-a-monday Puzzler for a Mond...
3 years ago
Solved
Cell joiner
You are given a cell array of strings and a string delimiter. You need to produce one string which is composed of each string fr...
3 years ago
Solved
Getting the indices from a vector
This is a basic MATLAB operation. It is for instructional purposes. --- You may already know how to <http://www.mathworks....
3 years ago
Published
Investigating an Error in My Check For References Web App
19:31 Debugging and fixing a problem in a MATLAB web app, poses some challenges that you don’t have...
3 years ago
Published
Investigating Large Variables After Out of Memory Error
11:58 My code, which was running overnight, has stopped with a rare “out of memory” error. I intend...
3 years ago
Published
Updating My Image Size Check Function to Ignore a Class of Images
43:26 I need to update my script which checks that all the images on our web site are smaller than a...
3 years ago
Published
Fixing a Bug in My Blog Post Position Code
4:56 The script from my last blog post, which I had set to run daily, has errored-out today, so I need...
3 years ago
Published
Determining My Last Post’s Position on the Blogs Index Page
27:26 Sometimes I forget to blog about what I have been doing for a few days, so I want to find a way...
3 years ago
Published
Debugging at Point of Error
12:16 One of my MATLAB scripts has failed and is currently stopped at the error point. By having...
3 years ago
Published
Using parfor to Make Many Web Requests
47:27 My colleague asked me to access all the pages on a web server in order to populate it’s cache. I...
3 years ago
Published
Analyzing Sitemaps
51:43 Today, I want to analyze the sitemaps on mathworks.com. These XML files, in standard locations,...
3 years ago
Published
Repurposing Some MATLAB Code to Detect Large Web Images
46:56 I need to find all video thumbnails on our website that are larger than a certain size. I tried...
3 years ago
Published
Shortest Path Between Two Web Pages
31:05 I want to find how you get to a particular web page on our website from another one, i.e. what...
3 years ago
Published
I Want To Add An “Are You Sure?” Alert To My Web App
28:38 The web app I’m working on manipulates a set of MAT files and lets me switch between them....
3 years ago
Published
AutoHotkey Shortcuts for the MATLAB Editor
11:49 I created some AutoHotkey shortcuts to make it easier to execute arbitrary lines of code in the...
4 years ago
Published
Copying Text to the Clipboard in MATLAB Web App – Fail
18:29 I want to occasionally copy text from data in a table in my web app, so I try to add a line to...
4 years ago
Published
Adding Another Output Argument to a Function
18:23 I need to add another output argument to a function I made last week, to return some more...
4 years ago