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# David Hill

Last seen: Today 2017 以来アクティブ

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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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-...

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]; ...

1日 前

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...

1日 前

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, ...

1日 前

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

1日 前

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...

1日 前

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...

1日 前

determine if
determine if the elements of a matrix is a nan and return true

1日 前

find the 'M'
for an input x, return 1 at the location of the letter 'M'

1日 前

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

1日 前

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: ...

1日 前

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...

1日 前

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 ...

1日 前

Thank!
. Thank all.

2日 前

Matrix Generation from Vector Multiplication
Output the matrix generated from multiplying two vectors together

2日 前

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...

2日 前

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).

2日 前

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...

2日 前

Matrix element wise multiplication
Take two incoming vectors, and multiply them element wise

2日 前

Vector indexing: lower than mean
Find all values in a vector lower than the mean of the vector

2日 前

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

2日 前

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...

2日 前

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

2日 前

Replace 0 indices in array with 1's
Take a incoming vector, and replace 0's with ones

2日 前

Matrix Max Finder
Output the maximum value in a matrix

2日 前

Matrix multiplication
Multiply two incoming matrices via matrix multiplication

2日 前

Find the index of the lowest number in a matrix
Take a matrix, and find the [row cal] index of the lowest number

2日 前

Take two incoming vectors and output the sum of the two vectors

2日 前

Resizing Matrices
Take an 4x3 matrix, and resize it to a 2x6 matrix

2日 前

Easy Sequences 19: Length of Prime-sided Rectangle with Maximum Area
A prime-sided rectangle is a rectangle having sides represented by prime numbers. The figure below shows all the possible prime-...

2日 前