# 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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**Content Feed**

Solved

A matrix of introverts

You are given a matrix full of numbers who happen to be very shy. Write a MATLAB function that will put a square of zeros aroun...

14 hours ago

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Determine value using Look-up table method

Given a set of 2 vectors x and y related in a certain way, you are supposed to find value of y (ydash) given a particular value ...

15 hours ago

Solved

Delete the rows in the middle

We will delete the rows in the middle and keep the first and the last rows. For example if input is [1 2 1 7 1 8 ...

17 hours ago

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Consecutive Powers

Return 2 numbers and 2 powers such that their difference is 1 A 4 element row vector is expected: x where x(1)^x(2) - x(...

18 hours ago

Solved

Easy Sequences 20: Counting Prime-sided Rectangles

A prime-sided rectangle is a rectangle having sides represented by prime numbers. The figure below shows all the possible prime-...

4 days ago

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Matrix which contains the values of an other matrix A at the given locations.

If you have two matrices, which together give xc and yc coordinates into another matrix, eg : xc = [1 1 1; 2 2 1]; ...

5 days ago

Solved

No Twins?

Write a function that accepts as input a vector and returns the same vector, but retaining only the first occurrence of an eleme...

5 days ago

Solved

Find the elements of a matrix according to a defined property.

From A = [5,2,3] and B = [1,2,3,4,5,6,7,8,9,10] produce a vector C where : C(1) is the sum of the first A(1) elements of B, ...

5 days ago

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A quadrant matrix

Write a function called quadrants that takes as its input argument a scalar integer named n. The function returns Q, a 2n-by-2n ...

5 days ago

Solved

Find the distance traveled by a car given velocity and time.

A car is traveling at a constant velocity for a specific amount of time. The function should use the two inputs, velocity and ti...

5 days ago

Solved

Where is the number that you want to find?

For a given matrix A, find where the input number x appears. Do this task by returning the vector which contains the row and th...

5 days ago

Solved

Sum the rows

Sum the rows of the given matrix. Example x = [ 1 2 3 4 ] y = [ 3 7 ]

5 days ago

Solved

Make an identity matrix whose diagonal elements are 1:n

For a given input n, make an n by n identity matrix that contains the elements 1:n along its diagonal. For example, if input=5: ...

5 days ago

Solved

Increment up an input vector

Increment up an input vector by adding the indices to the vector values. For example, if an input vector is [3, 2, 6, 1, 6], the...

5 days ago

Solved

Pairwise column flip

Given matrix *M_in*, flip every pair of columns. So if *M_in* is 1 2 3 4 1 2 3 4 then *M_out* is 2 1 4 3 2 1 4 3 ...

5 days ago

Solved

Matrix Generation from Vector Multiplication

Output the matrix generated from multiplying two vectors together

5 days ago

Solved

String Delimination and Outputting

In this problem, take an incoming string and deliminate the string based on spaces. Output the first string in between the space...

5 days ago

Solved

Check if inputted variable is a string or a number

Check if a inputted variable is a number or a string, given a string input (i.e. '1' is 1 and thus a number, 'a' is a string).

5 days ago

Solved

Automatic String Editing

In this function, you will take an incoming string, and output the same string with each character one letter later in the alpha...

5 days ago

Solved

Matrix element wise multiplication

Take two incoming vectors, and multiply them element wise

5 days ago

Solved

Vector indexing: lower than mean

Find all values in a vector lower than the mean of the vector

5 days ago

Solved

Vector Element Multiplication

Take two incoming vectors, and output the element wise multiplication of the vectors.

5 days ago

Solved

More Simple String Concatenation

Take the first string input, reverse the order of the string from the end to beginning (i.e. apple becomes elppa), add a space a...

5 days ago

Solved

Simple String Concatenation

This is a simple problem involving taking two incoming strings, and outputting the concatenated string with a space separating t...

5 days ago

Solved

Replace 0 indices in array with 1's

Take a incoming vector, and replace 0's with ones

5 days ago