Alex

Aktiv seit 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...

mehr als 10 Jahre vor | 1 Antwort | 0

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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...

mehr als 12 Jahre vor | 2 Antworten | 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...

mehr als 12 Jahre vor | 2 Antworten | 0

2

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Frage

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...

fast 13 Jahre vor | 1 Antwort | 0

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Gelöst

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

fast 13 Jahre vor

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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...

fast 13 Jahre vor

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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...

fast 13 Jahre vor

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

fast 13 Jahre vor

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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...

fast 13 Jahre vor

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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...

fast 13 Jahre vor

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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...

fast 13 Jahre vor

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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...

fast 13 Jahre vor

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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...

fast 13 Jahre vor

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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...

fast 13 Jahre vor

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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...

fast 13 Jahre vor

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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...

fast 13 Jahre vor

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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 ...

fast 13 Jahre vor

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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...

fast 13 Jahre vor

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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 ...

fast 13 Jahre vor

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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...

fast 13 Jahre vor

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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.

fast 13 Jahre vor

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

fast 13 Jahre vor

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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 ...

fast 13 Jahre vor

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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...

fast 13 Jahre vor

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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:...

fast 13 Jahre vor