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Raouf Amara


Active since 2019

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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...

10 months 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...

10 months 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: Input...

10 months 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...

10 months 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...

10 months ago

Solved


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

10 months 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...

10 months 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 displayed ...

10 months 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. Example...

10 months 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 ...

10 months 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...

10 months 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:...

10 months ago

Answered
How to write the MATLAB code for this question?
integral

5 years ago | 1

Answered
How do I optimize the peak interval?
I suggest you lookup the findpeaks function and its options for finding the events. Then it depends on what these events actuall...

5 years ago | 0

Answered
String Search with Special Characters
pat = '>ABCD \w*.\w*<'; str = 'whateveryouwant>ABCD 2345678.123<andmore>ABCD 1010.01<'; idx = regexp(str,pat)

5 years ago | 1

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Question


How to speed up pairwise difference calculation between vectors under certain condition?
I have two double arrays A (size: Nx1) and B (Mx1) both with large increasing values (from ~1e9 to ~1e13; not sure this is relev...

5 years ago | 1 answer | 0

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