# ruke xiong

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**Content Feed**

Solved

Insert zeros into vector

Insert zeros after each elements in the vector. Number of zeros is specified as the input parameter. For example: x = [1 ...

6 months ago

Solved

Change the sign of even index entries of the reversed vector

change the signs of the even index entries of the reversed vector example 1 vec = [4 -1 -2 9] ans = [9 2 -1 -4] example2...

6 months ago

Solved

Create a vector whose elements depend on the previous element

The idea is to create a vector A whose elements depend on the previous element : *A(i+1) = 2*A(i)+1* *2 Inputs*: - A : The...

7 months ago

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Unique values without using UNIQUE function

You must return unique values in a vector in *stable* mode without using the unique function. About stable order flag: ...

7 months ago

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Set a diagonal

Given a matrix M, row vector v of appropriate length, and diagonal index d (where 0 indicates the main diagonal and off-diagonal...

7 months ago

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Max index of 3D array

Given a three dimensional array M(m,n,p) write a code that finds the three coordinates x,y,z of the Maximum value. Example ...

7 months ago

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Finding peaks

Find the peak values in the signal. The peak value is defined as the local maxima. For example, x= [1 12 3 2 7 0 3 1 19 7]; ...

11 months ago

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Find nth maximum

Find nth maximum in a vector of integer numbers. Return NaN if no such number exists. x = [2 6 4 9 -10 3 1 5 -10]; So ...

11 months ago

Solved

Create an index-powered vector

Given a input vector x, return y as index-powered vector as shown below. Example x = [2 3 6 9] then y should be [...

11 months ago

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Oh Zero Zero Zero!!!

Hello all, So you have to find the largest section of zeros in a vector and then find the length of those zeros and there start...

11 months ago

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Find last zero for each column

Given a numeric array of arbitrary size, return the row index of the last zero for each column. If a column contains all nonzero...

11 months ago

Solved

Count consecutive 0's in between values of 1

So you have some vector that contains 1's and 0's, and the goal is to return a vector that gives the number of 0's between each ...

11 months ago

Solved

Calculate the Number of Sign Changes in a Row Vector (No Element Is Zero)

For a row vector: V=[7 1 2 -3] there is one sign change (from 2 to -3). So, the function you write must return N=1. F...

11 months ago

Solved

Symmetry of vector

Determine whether the vector is symmetric or not (vector could be even or odd in length). For example: x = [1 2 3 3 2 1] ...

11 months ago

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Create an n-by-n null matrix and fill with ones certain positions

The positions will be indicated by a z-by-2 matrix. Each row in this z-by-2 matrix will have the row and column in which a 1 has...

11 months ago

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Implement a bubble sort technique and output the number of swaps required

A bubble sort technique compares adjacent items and swaps them if they are in the wrong order. This is done recursively until al...

11 months ago

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"Look and say" sequence

What's the next number in this sequence? * [0] * [1 0] * [1 1 1 0] * [3 1 1 0] * [1 3 2 1 1 0] This a variant on the w...

12 months ago

Solved

Find the stride of the longest skip sequence

We define a _skip sequence_ as a regularly-spaced list of integers such as might be generated by MATLAB's <http://www.mathworks....

12 months ago

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Sum of first n terms of a harmonic progression

Given inputs a, d and n, return the sum of the first n terms of the harmonic progression a, a/(1+d), a/(1+2d), a/(1+3d),....

12 months ago

Solved

How to subtract?

*± ± ± ± ± ± ± ± ± ± ±* * Imagine you need to subtract one...

12 months ago

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The Hitchhiker's Guide to MATLAB

Output logical "true" if the input is the answer to life, the universe and everything. Otherwise, output logical "false".

12 months ago

Solved

Approximation of Pi

Pi (divided by 4) can be approximated by the following infinite series: pi/4 = 1 - 1/3 + 1/5 - 1/7 + ... For a given numbe...

12 months ago

Solved

Perimeter of a semicircle

Given the diameter d, find the perimeter of a semicircle

12 months ago

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Return fibonacci sequence do not use loop and condition

Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: ...

12 months ago

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Find the next Fibonacci number

In the sequence of Fibonacci numbers, every number is the sum of the two preceding ones: 1, 1, 2, 3, 5, 8, 13, 21, 34, 55...

12 months ago

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Integer Sequence - II : New Fibonacci

Crack the following Integer Sequence. (Hints : It has been obtained from original Fibonacci Sequence and all the terms are also ...

12 months ago

Solved

Return the Fibonacci Sequence

Write a code which returns the Fibonacci Sequence such that the largest value in the sequence is less than the input integer N. ...

1 year ago

Solved

Given a square and a circle, please decide whether the square covers more area.

You know the side of a square and the diameter of a circle, please decide whether the square covers more area.

1 year ago