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David Verrelli


18 total contributions since 2011

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Nearest Numbers
Given a row vector of numbers, find the indices of the two nearest numbers. Examples: [index1 index2] = nearestNumbers([2 5 3...

1 month 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 ...

1 month 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...

1 month 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.

1 month ago

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Return the 3n+1 sequence for n
A Collatz sequence is the sequence where, for a given number n, the next number in the sequence is either n/2 if the number is e...

1 month ago

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Most nonzero elements in row
Given the matrix a, return the index r of the row with the most nonzero elements. Assume there will always be exactly one row th...

1 month ago

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

1 month 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...

1 month 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...

1 month 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:...

1 month ago

Answered
CIE-LCH colorspace range for skin color detection
The syntax looks wrong. Refer to <https://au.mathworks.com/help/matlab/ref/if.html> Try perhaps: if (C >= 11.64 ...

1 month ago | 0

Answered
car counting. speed calculation
Hi, Ben, Walter & A7mad. For me, I'd be concerned, if setting up two 'lines' at different distances along the road, about t...

1 month ago | 0

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 ...

10 months ago

Answered
What are the answers to the Associate Exam Practice Questions?
The questions are more difficult than they might appear. After testing in MATLAB I could confirm the correct answers, and I rec...

10 months ago | 1

Answered
How can I get the new position coordinates of my object after I rotate it using the HGTRANSFORM function?
Two short follow-up points: (1) It doesn't seem to be necessary to split the manual transformation into two separate steps ...

1 year ago | 0

Answered
How do I install additional toolboxes into an existing installation of MATLAB?
The answer by the MathWorks Support Team focusses on Toolboxes that are supplied and licensed by MathWorks. (Which also appeare...

1 year ago | 4

Responded


Re: Problem creating animation output file from Matlab m-file
Hello, For example, I tried creating an animated GIF using images of mixed sizes, mixing landscape and portrait orientations. ...

2 years ago | 19573 views

Responded


Re: Video Formats supported by Matlab
Chaos" <rothko.fan@gmail.com> wrote in message > using matlab to play any kind video format is practically a waste of time. ther...

5 years ago | 11407 views