David Hill
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2,440 total contributions since 2017David Hill's Badges
Contribute at least one answer each month for 12 consecutive months
Awarded to David Hill on 02 Aug 2020
100 of your answers have been accepted
Awarded to David Hill on 16 Jan 2020
Solve all the problems in Indexing II
Awarded to David Hill on 19 Mar 2020
Solve all the problems in Sequences & Series III
Awarded to David Hill on 14 Feb 2020
Create 10 problems
Awarded to David Hill on 20 Oct 2019
Your submissions received 5 five star ratings
Awarded to David Hill on 16 Sep 2020
Your submissions were downloaded 100 or more times in a month
Awarded to David Hill on 03 Mar 2020
Publish your first comment or rating
Awarded to David Hill on 09 Oct 2019
Solve 500 problems
Awarded to David Hill on 11 Oct 2019
Publish your first submission
Awarded to David Hill on 09 Oct 2019
Answer 1 question that was unanswered for more than 30 days
Awarded to David Hill on 24 Sep 2019
Create a problem
Awarded to David Hill on 26 Aug 2019
Solve a problem with a best solution
Awarded to David Hill on 24 Aug 2019
Solve all the problems in Computation Geometry II
Awarded to David Hill on 16 Aug 2019
Solved
Replace all odd numbers with NaN
Replace all odd numbers in the vector or matrix with NaN. For example, if x = [1 3 4 5 8 11]; then return y = [NaN Na...
2 hours ago
Solved
String Array Basics, Part 1: Convert Cell Array to String Array; No Missing Values
<http://www.mathworks.com/help/matlab/characters-and-strings.html String array> and cell array are two types of containers for s...
2 hours ago
Solved
Remove element(s) from cell array
You can easily remove an element (or a column in any dimension) from a normal matrix, but assigning that value (or range) empty....
2 hours ago
Solved
Create a cell array out of a struct
Create a cell array out of a (single) struct with the fieldname in the first column and the value in the second column: in: ...
2 hours ago
Solved
Natural numbers in string form
Create a cell array of strings containing the first n natural numbers. _Slightly_ harder than it seems like it should be. Ex...
3 hours 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...
1 day ago
Solved
Solve system of equation!
Given provided system of equation, and find x and y. System of equation can be expressed as each term's coefficient. For exam...
1 day ago
Solved
Removing vibration!
There are [y] that vary with [x] but y including small useless vibration. x=1:10 y=[1.71 2.03 3.28 4.05 5.10 6.82 7.69 8.3...
1 day ago
Solved
Cody problems in French : Trouvez la logique Pt.2
Trouvez la logique entre x et y, aidez-vous de la test suite. Bon courage. P.S: L'utilisation de "^" est de nouveau fortement...
1 day ago
Solved
Analyze observation data
Suppose you have the following data (A,B,C) in three-column format. A B C -------------------------- t=1 ...
1 day ago
Solved
Scalar Matrix Manipulation
Assume, input x is a scalar matrix such as, x = 2 0 0 0 2 0 0 0 2 th...
1 day 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 ...
1 day ago
Use loops to create a 3 x 5 matrix in which the value of each element is the difference between the indices divided by the sum of its indices (the row num ber and column number of the element). For example, the value of the element (2,5) is (2 – 5)/
[a,b]=ind2sub([3 5],1:15); m = reshape((a-b)./(b+a),[3],[5]);
1 day ago | 0
Solved
Derivative function
Given a function handle f, generate a function that evaluates the derivative of f Examples: f = @sin; df = De...
1 day ago
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