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Back to basics 22 - Rotate a matrix

Covering some basic topics I haven't seen elsewhere on Cody. Rotate the input matrix 90 degrees counterclockwise (e.g. [1 2; ...

6 years ago

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Program an exclusive OR operation with logical operators

Program an exclusive or operation *without* using the MATLAB function xor. Use logical operators like |, &, ~, ... instead. ...

6 years ago

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Multielement indexing of a row array

The row array birthRateChina stores the China birth rate (per 1000 people) for years 2000 to 2012. Write a statement that create...

6 years ago

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Sum of diagonal of a square matrix

If x = [1 2 4; 3 4 5; 5 6 7] then y should be the sum of the diagonals of the matrix y = 1 + 4 + 7 = 12

6 years ago

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Is this triangle right-angled?

Given three positive numbers a, b, c, where c is the largest number, return *true* if the triangle with sides a, b and c is righ...

6 years ago

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Return a list sorted by number of occurrences

Given a vector x, return a vector y of the unique values in x sorted by the number of occurrences in x. Ties are resolved by a ...

6 years ago

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Tell me the slope

Tell me the slope, given a vector with horizontal run first and vertical rise next. Example input: x = [10 2];

6 years ago

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Project Euler: Problem 1, Multiples of 3 and 5

If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23...

6 years ago

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Too mean-spirited

Find the mean of each consecutive pair of numbers in the input row vector. For example, x=[1 2 3] ----> y = [1.5 2.5] x=[1...

6 years ago

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Pizza value using expression with parentheses

Pizza prices are typically listed by diameter, rather than the more relevant feature of area. Compute a pizza's value (cost per ...

6 years ago

Answered

Unreasonable ODE45 results

This looks to me as if ODE45 is initially taking big steps which only coarsely capture the behavior, but it quickly recovers and...

Unreasonable ODE45 results

This looks to me as if ODE45 is initially taking big steps which only coarsely capture the behavior, but it quickly recovers and...

6 years ago | 0

Answered

The mathematics behind modelling

You have a system of 7 coupled ODEs. You will need to code the equations into a function, define the initial conditions and inte...

The mathematics behind modelling

You have a system of 7 coupled ODEs. You will need to code the equations into a function, define the initial conditions and inte...

6 years ago | 0

| accepted

Answered

Disable help search highlights after having jumped to a result.

With a page open that has search terms highlighted, press the Esc key to disable the highlighting.

Disable help search highlights after having jumped to a result.

With a page open that has search terms highlighted, press the Esc key to disable the highlighting.

6 years ago | 3

| accepted

Answered

how to draw a directed graph ??

With MATLAB R2015b you can <http://www.mathworks.com/help/matlab/graph-and-network-algorithms.html create and plot graphs> witho...

how to draw a directed graph ??

With MATLAB R2015b you can <http://www.mathworks.com/help/matlab/graph-and-network-algorithms.html create and plot graphs> witho...

6 years ago | 0

Answered

How to use "graphmaxflow" function for undirected graphs in matlab?

In MATLAB R2015b, you can easily create and analyze graphs. See the following documentation for more info: http://www.mathwor...

How to use "graphmaxflow" function for undirected graphs in matlab?

In MATLAB R2015b, you can easily create and analyze graphs. See the following documentation for more info: http://www.mathwor...

6 years ago | 0

| accepted

Answered

Draw Directed or undirected graph

This functionality is available in MATLAB R2015b. See the following documentation for more info: http://www.mathworks.com/hel...

Draw Directed or undirected graph

This functionality is available in MATLAB R2015b. See the following documentation for more info: http://www.mathworks.com/hel...

6 years ago | 0

| accepted

Solved

Lightning strike distance: Writing a function

Write a function named LightningDistance that outputs "distance" given input "seconds". Seconds is the time from seeing lightnin...

7 years ago

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Roll the Dice!

*Description* Return two random integers between 1 and 6, inclusive, to simulate rolling 2 dice. *Example* [x1,x2] =...

7 years ago

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Determine if input is divisible by three.

Given a positive integer, n, determine if n is divisible by 3. If yes, the function should output true. If no, false.

7 years ago

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Summation of array

Given an array, Find the sum of all of the elements in it Examples: Input x = [1 2 3 5; 4 5 6 7]; Output y is 33

7 years ago

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Vertically stack two vectors

Stack two vectors on top of each-other so that... if A = [1 5 3] and B = [8 6 4] then C = [1 5 3 ; 8 6 4]

7 years ago

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Create an array (n,n) where only diagonal elements are '1' and others are '0'

Create an array (n,n) where only diagonal elements are '1' and others are '0' EX: n = 3; then Resultant array would be [ 1 0...

7 years ago

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Get the array of sum for three consecutive numbers in an array

Get the array of sum, for three consecutive numbers in an array. if Input 'x' does not have at-least 3 elements then 'y' shou...

7 years ago

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Determine the mean of matrix

Determine the mean of matrix without using mean function Hint: use simple algorithm

7 years ago

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Create a row array using double colon operator

Create a row array from 9 to 1, using the double colon operator.

7 years ago

Answered

binning data in equally spaced intervals

As others noted, histcounts was introduced in R2014b and provides a great deal more flexibility for problems like this. To us...

binning data in equally spaced intervals

As others noted, histcounts was introduced in R2014b and provides a great deal more flexibility for problems like this. To us...

7 years ago | 1