David Hill
Electrical Engineering with minors in Computer Science, Mathematics, and Creative Writing.
Working as Undergraduate Research Assistant in the field of Computational Photonics
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MATLAB Central Community 20 Year Anniversary Mini Hack participant badge
Awarded to David Hill on 11 Nov 2021
MATLAB Central Community 20 Year Anniversary Treasure Hunt participant badge
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Contribute at least one answer each month for 24 consecutive months
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Answer 3 questions that were unanswered for more than 30 days
Awarded to David Hill on 11 Jan 2021
Like a problem or solution
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Solve all the problems in Sequences & Series II
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Your submissions were downloaded 250 or more times in a month
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Solve all the problems in Cody5:Easy
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Solve all the problems in Number Manipulation II problem group
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Solve all the problems in Draw Letters problem group
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Solve all the problems in Cody Problems in Japanese problem group
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Content Feed
Find all possible combinations of string array
You could get all possible combinations and then index into your struct. [idxa,idxb,idxc]=ndgrid(1:5,1:3,1:7);
1 day ago | 0
Creating a column vector form data in table to meet specific requirements.
risk=ones(size(age)); risk(age>75|BMI>50)=3; risk(age>50&age<=75&BMI>40&BMI<=50)=2;
1 day ago | 0
| accepted
what changes can be made in the code?
function out = mycumsum (m) out = m(1); for i = 2:length(m) out(i)=out(i-1)+m(i); end
1 day ago | 0
how can do get this
You could simply look at the difference a=[5 9.8 15 6 10 9.5 9.7 9.8 9.8 9.8 9.8]; idx=find(diff(a)==0,1);
1 day ago | 0
| accepted
RS-232 Serial Communication (Mark-10)
Look at your manual for your instrument to set up the parameters s = serialport('COM1',115200);%create object s.DataBits=8; s...
2 days ago | 0
What does this line really do?
Look at what this does. a=randi(2,1,20)-1 a(a==1)=-1%same as a(1,a==1)=-1 a(a==0)=1%same as a(1,a==0)=1;
2 days ago | 0
How do I subplot figures and Title Figures
Look at subplot() command. subplot(1,2,1); imshow(image1); subplot(1,2,2); imshow(image2);
2 days ago | 0
Converting cell array to num array for conversions
Is your data is hexidecimal? You can convert it directly to decimal (use java BigInteger for large numbers) import java.math.* ...
2 days ago | 0
help me how to find how many terms does it take until the series converges to 0.001?
Don't understand your queston completely, but quite easy to form the series. For example when n=35, which is about as far as you...
2 days ago | 0
How can I make this simple code a for loop?
x=1:5; hold on; for k=1:3 plot(x,x.^k); end
2 days ago | 0
| accepted
Solved
Test if a matrix is symmetric
Write a logical function that returns 1 if the input matrix is symmetric and 0 otherwise.
2 days ago
Solved
calculate the tangent of angle in radians
Calculate the tangent of angle in degrees
2 days ago
Solved
Volume of Cylinder
Compute the Circumference of a Cylinder given it's radius and height.Here x is the radius and y is the height
2 days ago
Solved
Factorial: Unlimited Size : java.math
This challenge is an application of java.math that allows unlimited precision calculations. The primary reference sites are <ht...
2 days ago
Solved
Change number representation to HEX
Given a number change it's representation to HEX and output it.
2 days ago
Solved
Easy Sequences 51: Positive Gaussian Primes
A Gaussian Prime is a gaussian integer that cannot be decomposed as product of two non-unit gaussian integers (the complex units...
4 days ago
Solved
Easy Sequences 52: Non-squarable Rectangles
Any integer-sided rectangle can be cut into unit rectangles () and rearranged into sets of smaller rectangles. For example the ...
4 days ago
Solved
Compute the Sequence of the Day
A sequence starts with 1 and 2, and each subsequent term is the sum of the digits of the product of the previous two terms. As a...
5 days ago
Solved
Easy Sequences 53: Greatest Proper Divisor
The greatest proper divisor () of an integer is the largest integer , such that and . Furthermore, we define: . Below is the...
5 days ago
Solved
Strange Number Algorithms
Three integer numbers will be provided to you. Write a function to Step1: Multiply first number by 3. Step2: Add 6 with t...
5 days ago
Solved
Is this number Munchhausen Narcissistic?
In this problem, simply return 1 if a supplied number is Munchhausen narcissistic or 0 if not. Example 153 is narcissistic...
5 days ago
Solved
provide the numerical answer to these number questions...
return a row matrix containing the sorted numbers which answer the following questions: a) what is the first Knuth number to...
5 days ago
Solved
remove nans fast
There are several ways to locate and remove nans in a matrix, and return an 1d row vector. In this problem the challenge is ...
5 days ago
Trying to get my output to be 22 decimal places
You cannot use floating point if you want 22 decimal places of accuracy, you must use symbolic. function total=my_sin(x) digit...
5 days ago | 1
Vectorized iterative summation of matrices
What is wrong with using a loop? Why do you think it is going to be slower? a=eye(10); a(1,1)=0; a(end,end)=0; b = [1 2 3; 4...
5 days ago | 0
Solved
Two fractions, one sum
Given a positive number x, write a MATLAB script that will tell you how many ways that the reciprocal of that number can be writ...
6 days ago
