Alex

Con actividad desde 2013

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How can I adjust the tolerance parameter for pdeadgsc from adaptmesh?
I am trying to use adaptmesh to solve an elliptic PDE, and I would like to use pdeadgsc as the triangle selection method. Here i...

casi 11 años hace | 1 respuesta | 0

1

respuesta

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Creating a sparse vector inside a for loop.
Suppose I have a vector |u| that does not change. I want to create another vector |v = M*u|, where the matrix M depends on the i...

más de 12 años hace | 2 respuestas | 0

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Solving an elliptic PDE with a point source
How do I solve the following PDE: <</matlabcentral/answers/uploaded_files/7176/pde.png>> where c is a constant and delta i...

más de 12 años hace | 2 respuestas | 0

2

respuestas

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How to search for specific characters within a string.
Say I have the following files, foo1.85e-01.mat foo1.79e+00.mat foo1.82e+00.mat foo1.94e+00.mat foo2.30e+00.mat...

casi 13 años hace | 1 respuesta | 0

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Resuelto

Check if sorted
Check if sorted. Example: Input x = [1 2 0] Output y is 0

alrededor de 13 años hace

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Weighted average
Given two lists of numbers, determine the weighted average. Example [1 2 3] and [10 15 20] should result in 33.333...

alrededor de 13 años hace

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

alrededor de 13 años hace

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

alrededor de 13 años hace

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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...

alrededor de 13 años hace

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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...

alrededor de 13 años hace

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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...

alrededor de 13 años hace

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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...

alrededor de 13 años hace

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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...

alrededor de 13 años hace

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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...

alrededor de 13 años hace

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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...

alrededor de 13 años hace

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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...

alrededor de 13 años hace

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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 ...

alrededor de 13 años hace

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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...

alrededor de 13 años hace

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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 ...

alrededor de 13 años hace

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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...

alrededor de 13 años hace

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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.

alrededor de 13 años hace

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

alrededor de 13 años hace

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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 ...

alrededor de 13 años hace

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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...

alrededor de 13 años hace

Resuelto

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:...

alrededor de 13 años hace