Brad

Last seen: 12 mois il y a | Actif depuis 2013

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I'm currently a doctoral student at UC San Diego, conducting research on the neural network properties of memory formation. Using a mixture of neurobiological and computational programming tools, I study and model memory and synaptic potentiation. Professional Interests: neural networks, synaptic potentiation, memory, learning, brownian motion, particle diffusion, particle tracking

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A résolu

Calculate Amount of Cake Frosting
Given two input variables |r| and |h|, which stand for the radius and height of a cake, calculate the surface area of the cake y...

environ 4 ans il y a

A résolu

Create a matrix that counts up diagonally
Given a single input _N_, create a _N_ x _N_ matrix that counts from 1 : _N_ ², (along up-right diagonals, starting with 1 in th...

environ 4 ans il y a

Problème

Create a matrix that counts up diagonally
Given a single input _N_, create a _N_ x _N_ matrix that counts from 1 : _N_ ², (along up-right diagonals, starting with 1 in th...

environ 4 ans il y a | 2 | 20 solveurs

A résolu

Create times-tables
At one time or another, we all had to memorize boring times tables. 5 times 5 is 25. 5 times 6 is 30. 12 times 12 is way more th...

presque 5 ans il y a

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Read a column of numbers and interpolate missing data
Given an input cell array of strings s, pick out the second column and turn it into a row vector of data. Missing data will be i...

presque 5 ans il y a

A résolu

Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

plus de 5 ans il y a

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Find the numeric mean of the prime numbers in a matrix.
There will always be at least one prime in the matrix. Example: Input in = [ 8 3 5 9 ] Output out is 4...

presque 6 ans il y a

A résolu

Finding Perfect Squares
Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...

presque 6 ans il y a

A résolu

Fibonacci sequence
Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: Inpu...

presque 6 ans il y a

A résolu

Remove any row in which a NaN appears
Given the matrix A, return B in which all the rows that have one or more <http://www.mathworks.com/help/techdoc/ref/nan.html NaN...

environ 6 ans il y a

A résolu

Is my wife right?
Regardless of input, output the string 'yes'.

plus de 9 ans il y a

A résolu

Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

plus de 9 ans il y a

A résolu

Elapsed Time
Given two date strings d1 and d2 of the form yyyy/mm/dd HH:MM:SS (assume hours HH is in 24 hour mode), determine how much time, ...

plus de 9 ans il y a

A résolu

Replace NaNs with the number that appears to its left in the row.
Replace NaNs with the number that appears to its left in the row. If there are more than one consecutive NaNs, they should all ...

plus de 9 ans il y a

A résolu

Determine whether a vector is monotonically increasing
Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

plus de 9 ans il y a

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Swap the first and last columns
Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

plus de 9 ans il y a

A résolu

Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Example...

plus de 9 ans il y a

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Find all elements less than 0 or greater than 10 and replace them with NaN
Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

plus de 9 ans il y a

A résolu

Triangle Numbers
Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

plus de 9 ans il y a

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Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

plus de 9 ans il y a

A résolu

Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

plus de 9 ans il y a

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Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

plus de 9 ans il y a

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Add two numbers
Given a and b, return the sum a+b in c.

plus de 9 ans il y a

A résolu

Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

plus de 10 ans il y a

A résolu

Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

presque 11 ans il y a

Brad

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