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What is missing from MATLAB?

What I miss the most is better forum for the community. We need Math Equation support through MathJaX (Like in StackExchange ...

What is missing from MATLAB?

What I miss the most is better forum for the community. We need Math Equation support through MathJaX (Like in StackExchange ...

más de 4 años ago | 0

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How to perform KNN regression

At each point you want to calculate the value (x, y) find the K closest point (For x). Then average them to create the new va...

How to perform KNN regression

At each point you want to calculate the value (x, y) find the K closest point (For x). Then average them to create the new va...

más de 4 años ago | 0

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Averaging Overlapping Pixels in Sliding Window Operation

Another option would be: I = reshape(accumarray(mIdx(:), mZ(:), [(M * N), 1], @(x) mean(x)), [M, N]); Where `mZ` is the ...

Averaging Overlapping Pixels in Sliding Window Operation

Another option would be: I = reshape(accumarray(mIdx(:), mZ(:), [(M * N), 1], @(x) mean(x)), [M, N]); Where `mZ` is the ...

más de 4 años ago | 0

Question

Saving Figure Data into a Matrix

Hello. I'm using 'image()' to display an image. I'm adding some annotations using text. I'd like to save the final resu...

casi 5 años ago | 2 answers | 0

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Summing digits

Given n, find the sum of the digits that make up 2^n. Example: Input n = 7 Output b = 11 since 2^7 = 128, and 1 + ...

alrededor de 5 años ago

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Bullseye Matrix

Given n (always odd), return output a that has concentric rings of the numbers 1 through (n+1)/2 around the center point. Exampl...

alrededor de 5 años ago

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Return the largest number that is adjacent to a zero

This example comes from Steve Eddins' blog: <http://blogs.mathworks.com/steve/2009/05/27/learning-lessons-from-a-one-liner/ Lear...

alrededor de 5 años ago

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Find the longest sequence of 1's in a binary sequence.

Given a string such as s = '011110010000000100010111' find the length of the longest string of consecutive 1's. In this examp...

alrededor de 5 años ago

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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 5 años ago

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Remove all the consonants

Remove all the consonants in the given phrase. Example: Input s1 = 'Jack and Jill went up the hill'; Output s2 is 'a ...

alrededor de 5 años ago

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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 5 años ago

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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...

alrededor de 5 años ago

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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 5 años ago

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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...

alrededor de 5 años ago

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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. Examp...

alrededor de 5 años ago

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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 5 años ago

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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 5 años ago

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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 5 años ago

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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 5 años ago

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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 5 años ago

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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 5 años ago

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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 5 años ago

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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 5 años ago

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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:...

alrededor de 5 años ago

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Can any body tell me how to implement KSVD in matlab?

Here is a function which implements the K-SVD algorithm. function [ mD ] = DL_KSVD( mD, mX, paramCardinality ) numberO...

Can any body tell me how to implement KSVD in matlab?

Here is a function which implements the K-SVD algorithm. function [ mD ] = DL_KSVD( mD, mX, paramCardinality ) numberO...

más de 5 años ago | 0

Answered

Linear Least Squares With 2 Inequality Constraints

I created a solution. It can be found here: http://math.stackexchange.com/a/1403593/33

Linear Least Squares With 2 Inequality Constraints

I created a solution. It can be found here: http://math.stackexchange.com/a/1403593/33

más de 6 años ago | 0

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Question

Linear Least Squares With 2 Inequality Constraints

Hello, I would like to know how can I solve the following Linear Least Squares problem: arg min(x) (Ax - b)'(Ax - b) s....

más de 6 años ago | 2 answers | 0

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Computing Mahalanobis Distance Between Set of Points and Set of Reference Points

Here is the solution fully vectorized (Though uses much more multiplications than needed): mA = reshape(bsxfun(@minus, perm...

Computing Mahalanobis Distance Between Set of Points and Set of Reference Points

Here is the solution fully vectorized (Though uses much more multiplications than needed): mA = reshape(bsxfun(@minus, perm...

más de 6 años ago | 0

| accepted

Question

Computing Mahalanobis Distance Between Set of Points and Set of Reference Points

Hello, I have an n x p matrix - mX which is composed of n points in R^p. I have another m x p matrix - mY which is compo...

más de 6 años ago | 2 answers | 0