Question

Variable in a parfor cannot be classified

I'm attempting to convert some code to use a parfor, and have run into difficulty. A simplified example is given below, which do...

1 year ago | 1 answer | 0

Question

Can't read Excel files on Linux

A user has a large number of excel files (.xlsx) to read using `xlsread`. These files open just fine with Excel, and using `xlsr...

2 years ago | 0 answers | 0

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Reverse the Words (not letters) of a String

*Description* Change the words of a string such that the words appear in reverse order. You may assume that the string is a n...

2 years ago

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Number of digits in an integer

Specifies how many digits in a given integer. Example: in=100 ==> out=3

2 years ago

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Is it a number?

Determine if input is numeric. If it is,output is 1; if it is not, output is 0.

2 years ago

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Solve the Sudoku Row

*Description* A simple yet tedious task occurs near the end of most Sudoku-solving algorithms, computerized or manual. The ta...

2 years ago

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Narcissistic number ?

Inspired by Problem 2056 created by Ted. In recreational number theory, a narcissistic number is a number that is the sum of ...

2 years 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...

2 years ago

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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. Examp...

2 years ago

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Sum the numbers on the main diagonal

Sum the numbers on the main diagonal of an n-by-n matrix. For input: A = [1 2 4 3 6 2 2 4 7]...

2 years 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 ...

2 years ago

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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...

2 years ago

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03 - Matrix Variables 6

Make _fMat_ be a 5x3 matrix of random integers with values from -3 to 3 (Hint: use *randi*)

2 years 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...

2 years ago

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Column Removal

Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

2 years ago

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Find the logic

There exists one logic in between input and output. Find it (easy math). Example 1: x=13 then y=339; Example 2: x=26...

3 years ago

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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...

3 years ago

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02 - Vector Variables 2

Make the following variable: <<http://samle.dk/STTBDP/Assignment1_2b.png>>

3 years ago

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Remove any row in which a NaN appears

Given the matrix A, return B in which all the rows that have one or more <http://www.mathworks.com/help/techdoc/ref/nan.html NaN...

3 years ago

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Determine the square root

Determine the square root of the value the user has entered, n.

3 years ago

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Area of an equilateral triangle

Calculate the area of an equilateral triangle of side x. <<http://upload.wikimedia.org/wikipedia/commons/e/e0/Equilateral-tr...

3 years ago

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Pizza!

Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

3 years ago

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Make a 1 hot vector

Make a vector of length _N_ that consists of all zeros except at index _k_, where it has the value 1. Example: Input ...

3 years 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.

3 years ago

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Back to basics 15 - classes

Covering some basic topics I haven't seen elsewhere on Cody. Return the class of the input variable.

3 years ago

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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 ...

3 years 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...

3 years ago

Question

Set image aspect ratio using imshow

I am trying to load an image (screenshot of a graph), and plot my data on top. I have achieved this, but the aspect ratio of the...

3 years ago | 1 answer | 0