Community Profile

# Ed Hall

### UNiversity of Virginia

27 total contributions since 2012

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Solved

CONVERT TAN TO SIN
In a right angle triangle ABC given the tan(A) then find sin(A) For example tan(A)=3/4 then sin(A)=3/5

6 years ago

Solved

Wind Chill Computation
On a windy day, a temperature of 15 degrees may feel colder, perhaps 7 degrees. The formula below calculates the "wind chill," i...

6 years ago

Solved

Find the logic
There exists one logic in between input and output. Find it (easy math). Example 1: x=13 then y=339; Example 2: x=26...

6 years ago

Solved

Given area find sides
In a right angle triangle given area 'A' one arm=x, another arm=2x then find the value of x. For example, area A=400 then ...

6 years ago

Solved

Temperature Conversion Utility
There are a few problems on Cody regarding temperature conversion (C to K, C to F, F to C), but none include Rankine. Furthermor...

6 years ago

Question

Initial temperature for simulated annealing
Has anyone implemented the algorithm for computing the initial temperature to use in simulated annealing as detailed in the pape...

6 years ago | 1 answer | 0

### 1

Problem

Forward Substitution
Solve a lower triangular linear set of equations as described in the following link: http://www.people.virginia.edu/~teh1m/cody/...

8 years ago | 1 | 20 solvers

Problem

Linear system solve
Solve a linear set of equations as described in the following link: http://www.people.virginia.edu/~teh1m/cody/linsolv1.pdf

8 years ago | 0 | 53 solvers

Problem

Backward Substitution
Solve a upper triangular linear set of equations as described in the following link: http://www.people.virginia.edu/~teh1m/cody/...

8 years ago | 1 | 20 solvers

Solved

Linear system solve
Solve a linear set of equations as described in the following link: http://www.people.virginia.edu/~teh1m/cody/linsolv1.pdf

8 years ago

Solved

Backward Substitution
Solve a upper triangular linear set of equations as described in the following link: http://www.people.virginia.edu/~teh1m/cody/...

8 years ago

Solved

Forward Substitution
Solve a lower triangular linear set of equations as described in the following link: http://www.people.virginia.edu/~teh1m/cody/...

8 years ago

Problem

Pi Estimate 2
Estimate Pi as described in the following link: <http://www.people.virginia.edu/~teh1m/cody/Pi_estimation2.pdf>

8 years ago | 0 | 31 solvers

Solved

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...

8 years ago

Solved

Pi Estimate 2
Estimate Pi as described in the following link: <http://www.people.virginia.edu/~teh1m/cody/Pi_estimation2.pdf>

8 years ago

Solved

Pi Estimate 1
Estimate Pi as described in the following link: <http://www.people.virginia.edu/~teh1m/cody/Pi_estimation1.pdf>

8 years ago

Problem

Pi Estimate 1
Estimate Pi as described in the following link: <http://www.people.virginia.edu/~teh1m/cody/Pi_estimation1.pdf>

8 years ago | 4 | 241 solvers

Solved

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

8 years ago

Solved

Who Has the Most Change?
You have a matrix for which each row is a person and the columns represent the number of quarters, nickels, dimes, and pennies t...

8 years ago

Solved

Back and Forth Rows
Given a number n, create an n-by-n matrix in which the integers from 1 to n^2 wind back and forth along the rows as shown in the...

8 years ago

Solved

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...

8 years ago

Solved

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 ...

8 years ago

Solved

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...

8 years ago

Solved

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...

8 years ago

Solved

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

8 years ago

Solved

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:...

8 years ago

Solved

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 ...

8 years ago