Problem

Generate Convolution Matrix of 2D Kernel with Different Convolution Shapes (Full, Same, Valid)

In this problem the challenge is to build the Matrix Form equivalent of the function `conv2()` of MATLAB. The function to be ...

6 years ago | 0 | 3 solvers

Answered

How can I determine whether a string contains a substring?

I guess that since MATLAB R2016b it is recommended to use `contains` : Determine if pattern is in strings - MATLAB contains - M...

How can I determine whether a string contains a substring?

I guess that since MATLAB R2016b it is recommended to use `contains` : Determine if pattern is in strings - MATLAB contains - M...

6 years ago | 1

Answered

Functional form of the colon (:) operator?

I really wish MATLAB would add function to vectorize arrays into column vector as the colon operator does.

Functional form of the colon (:) operator?

I really wish MATLAB would add function to vectorize arrays into column vector as the colon operator does.

7 years ago | 0

Answered

Change opacity of Lines

In newer versions of MATLAB you can do that easily using the Color property of the line. By default it is RGB array (1 x 3)....

Change opacity of Lines

In newer versions of MATLAB you can do that easily using the Color property of the line. By default it is RGB array (1 x 3)....

7 years ago | 7

Answered

GUI - Slider which has two slide bars

Maybe you meant a Range Slider which you can create as shown in <http://undocumentedmatlab.com/blog/sliders-in-matlab-gui Slider...

GUI - Slider which has two slide bars

Maybe you meant a Range Slider which you can create as shown in <http://undocumentedmatlab.com/blog/sliders-in-matlab-gui Slider...

7 years ago | 0

Question

Display Pixel Values in Image - Alternative to `showPixelValues()`

Hello, I would like to display an image and its pixel values in a similar manner to <https://www.mathworks.com/matlabcentral/...

7 years ago | 3 answers | 0

Answered

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 ...

7 years ago | 0

Answered

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...

7 years ago | 0

Answered

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 ...

7 years 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...

8 years ago | 2 answers | 0

Solved

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 + ...

8 years ago

Solved

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...

8 years ago

Solved

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...

8 years ago

Solved

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...

8 years ago

Solved

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...

8 years ago

Solved

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 ...

8 years ago

Solved

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...

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

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...

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

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...

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

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 ...

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

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

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

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

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