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Put two time series onto the same time basis

Use interpolation to align two time series onto the same time vector. This is a problem that comes up in <http://www.mathwork...

2 years ago

Solved

Longest run of consecutive numbers

Given a vector a, find the number(s) that is/are repeated consecutively most often. For example, if you have a = [1 2 2 2 1 ...

2 years ago

Solved

ZigZag matrix with reflected format

ZigZag MATRIX with REFLECTED format. We have only input x. We have to create a matrix in the following pattern. input n=5...

2 years ago

Solved

Calendar Matrix

Return a calendar matrix for the given values of month and year. Assume that Sunday is the first day of the week. The resulting ...

2 years ago

Solved

Back to basics 20 - singleton dimensions

Covering some basic topics I haven't seen elsewhere on Cody. Remove the singleton dimensions from the input variable (e.g. if...

4 years ago

Solved

Sorting

Assume that x is an n-by-2 matrix. The aim is to return the first column of x, but sorted according to the second column. Exa...

4 years ago

Solved

Matrix Construction I

Given n, construct a matrix as shown in the example below. Example For n=8, the output should look like this: 1 2 3 4 ...

4 years ago

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How to calculate log?

There is a log that have base 5. How to calculate? log5(x)?

4 years ago

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Rotate array 90 degrees

Rotate the given matrix by 90 degrees. Example, A = [1 2 3 ; 4 5 6 ] B = rotated(A) = [ 3 6; 2 5; 1 4 ]

4 years ago

Solved

Change matrix to vector

Vector is a matrix whose size is 1 x n or n x 1. Change matrix to vector. x = 4 3 5 1 ...

4 years ago

Solved

Create a matrix with difference of each row of input matrix

With a given input matrix A, create a output matrix B in such a way that each row in B is a difference of rows of input matrix A...

4 years ago

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Percentage profit:3

x% product is sold at r1% profit. However, our target overall profit is rt%. What is the required percentage profit to meet the ...

4 years ago

Solved

Set x value to each odd index of vector y.

Set x value to each odd index of vector y.

4 years ago

Solved

0, 2, 0, -2, 0, 2, 0, -2, ...

Generate the first n terms of a periodic sequence defined as f(x) = 0, 2, 0, -2, 0, 2, 0, -2, ..., for x = 1, 2, 3, 4, 5, 6...

4 years ago

Solved

expand intervals vol.2

Similar to problem <http://www.mathworks.co.uk/matlabcentral/cody/problems/2528 2528>. This is a more general case, when bounds ...

4 years ago

Solved

Convert a numerical matrix into a cell array of strings

Given a numerical matrix, output a *cell array of string*. For example: if input = 1:3 output is {'1','2','3'} whic...

4 years ago

Solved

Find Missing Number

A little problem (inspired by CodeChef) for the coffee break. A friend give you an array of size n-1 integers and these int...

4 years ago

Solved

Odd elimination

Inspired by Project Euler problem #539 You'll be given a vector from 1 to n; Going from left to right, remove the first n...

4 years ago

Solved

count any radix?

given radix r(2-9), digts d(1-4), give all possible strings in sorted order. for example, if r=2, d=2, then output {'00' '01' '1...

4 years ago

Solved

DC-DC boost converter

Find the output voltage of a DC-DC boost converter when its input voltage is 12V and the duty cycle ratio is 0.6.

4 years ago

Solved

Increment up an input vector

Increment up an input vector by adding the indices to the vector values. For example, if an input vector is [3, 2, 6, 1, 6], the...

4 years ago

Solved

Solve the system of linear equations

4x - 2y +6z=8 2x + 8y +2z=4 6x + 10y +3z=0 Input is each coefficient of polynomial. For example, a=[4 ...

4 years ago

Solved

Slope of the line passing through two points

Determine the slope of a line passing through the points a=[x1 y1] and b=[x2 y2].

4 years ago