David Hill

Last seen: Today | Active since 2017

Electrical Engineering with minors in Computer Science and Mathematics. Working as an Undergraduate Research Assistant in the field of Robotics and Computational Photonics. Currently working on cutting-edge adaptive algorithms for controlling soft robots and other underdefined systems. Plan on continuing my education by pursuing a masters in mechanical engineering (robotics) and a MBA.

Programming Languages:
Python, C++, C, Java, MATLAB, HTML, Arduino
Spoken Languages:
English, Spanish

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Chain multiplication - 02
Following up on the problem in 55295, you found the number of multiplications needed to multiply two matrices. Now, you are giv...

ongeveer 3 uur ago

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Cut the rod
A rod of length n can be cut in different sizes. Different price is associated with different length of cuts. length, len= [1,...

ongeveer 4 uur ago

Solved

Number of leaps in binary search
Binary search is one of the most popular searching algorithms (Binary Search Algorithm). It works only in a sorted array. It uti...

ongeveer 5 uur ago

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Sort Non-zeros
Consider 0s in a vector creates a break-point. sort all the sub-arrays created by those break points. For example, a = [3, 4, 1...

ongeveer 5 uur ago

Solved

Chain multiplication - 01
Say, you are given two matrices - A (shape= 3*4) and B(shape = 4*5). If you multiply these two matrices, the resultant matrix w...

ongeveer 16 uur ago

Answered
Write a MATLAB script to find the sum of all prime numbers between 1 and 500
sum(primes(500))

1 dag ago | 0

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How to convert character column to 4 byte (total 32 bits) data?
dec2bin(15226547,32)-'0'

4 dagen ago | 0

Answered
Extract specific rows and columns from excel and store in a matrix
If formating is consistent, readmatrix should work. listing=dir; M=[]; for k=1:length(listing) m=readmatrix(listing(k)....

4 dagen ago | 0

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I want to create a binary matrix with a variable dimensions
k=10; M=50; O=randi(M+1,k)-1;%number of ones per row (number of zeros per row= 50 - O) for n=1:k m=[ones(1,O(n)),zeros(1...

4 dagen ago | 0

Answered
Combination of 2 image
idx=find(B(:,:,1)~=0&B(:,:,2)~=0&B(:,:,3)~=0);%find ~black pixels in image B C=B; C(idx)=A(:,:,idx);%set ~black pixels to imag...

4 dagen ago | 0

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Match numbers to allocate text
Your could also use a sparse array or an array of nan. x=[12 13 19 21]; y=[12 13 19 24 21 12 12]; X=nan(1,25); X(x)='ABCD'; ...

7 dagen ago | 0

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How to find x value for a known y in array plot?
[~,idx]=min(abs(y-.8*max(y)));%.8*max(y) is not part of the y-array, find the closest y-idx to that value x(idx)

8 dagen ago | 0

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Rule of mixtures (composites) - weighted bound
The <http://en.wikipedia.org/wiki/Rule_of_mixtures rule of mixtures> is used in the mechanical design of composite structures to...

12 dagen ago

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Rule of mixtures (composites) - lower and upper bounds (volumes)
The <http://en.wikipedia.org/wiki/Rule_of_mixtures rule of mixtures> is used in the mechanical design of composite structures to...

12 dagen ago

Solved

Get ranks of values in a vector
For a given vector, say [6 3 8 2], return the ranks (ascending) of observations, i.e. [3 2 4 1]. Do not worry about tied ranks. ...

12 dagen ago

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Handle to an array of functions
Given a cell array of functions that operate on scalars, it is required to return a function handle to process a vector of value...

12 dagen ago

Solved

Apply a function array to an array of numbers
It is required to apply a cell array of functions to a numerical array, where the functions accept only scalar inputs. Exampl...

12 dagen ago

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Calculate value of capacitor
Given the value of resistance and time at which capacitor charges to it's 99%. calculate the value of capacitor

12 dagen ago

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Visualization of experimental data across a surface
Assume that you have taken data across the surface of a sample, for example sheet resistance. The data is stored in a Nx3 matri...

12 dagen ago

Solved

Define the operators of function_handles
Suppose f and g are function_handles, try to define f+g,f-g,f*g and f/g. e.g. if f = @(x)x and g = @(x)x+1 ...

12 dagen ago

Answered
Hello, I need help with: Replace elements in Vector A with those of vector B of the same position, only if they meet a certain condition, otherwise replace by a zero. Thanks
t=4; A = [3 7 1 3 10 3 4 1 5 5]; B = [5 3 6 1 6 3 5 4 9 ...

12 dagen ago | 0

Solved

Best Fit RMS
Given a set of data as x and y, find the <http://en.wikipedia.org/wiki/Root_mean_square RMS> value between the data and its best...

12 dagen ago

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Find my birthday
Given a birth date x, find my age when my birth day will fall on the same day as I was born. So if I was born on Monday, what ag...

12 dagen ago

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Create a v-notch vector without "sort" function
Given a vector vec, create a v-shaped vector as shown below: vec = [ 10 2 3 89 5 7 90 0 12] Output vector = [90 89 12 10 7 5 3 ...

13 dagen ago

Solved

Tax Season ! How much is my salary?
Tax Season! I was employed for a period from x until y in a year and I get pay check of amount z on every alternate Friday of th...

13 dagen ago

Answered
Plot two histograms over one another
Play with the color and alpha face to get something you like. https://www.mathworks.com/matlabcentral/fileexchange/47552-histf?...

13 dagen ago | 0

Answered
Replacing Values in Matrix that are not equal to 1 while excluding 'NaN'
test2=test1; test2(test2==2)=1; test2(test2<0)=0;

13 dagen ago | 0

Answered
How do i insert one value from one array to another array
Look at pdist2 A = [1,2;2,1;1,1;1,3;3,2] ; B = [0.5,0.5;2,2]; pdist2(A,B)

13 dagen ago | 0

Answered
how to create a list of random number with a minimum difference between each number?
You can brute force it. m=200;%randomn numbers between 1-200 n=50;%array length d=20;%minimum distance a=randi(m,100000,n);%...

13 dagen ago | 0

Solved

Tony's trick for duplicating an mx1 vector n times
Without using repmat, or for loop, or concatenation, create a function to duplicate a vector, v, a specified number of times, n....

13 dagen ago

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