# cgo

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**Content Feed**

Question

modifying an identity matrix

I have an identity matrix. I want to put a '1' on the zeros that are right infront of the main diagonal, except at the very last...

10 months ago | 1 answer | 0

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answerQuestion

writing a linprog command for this optimisation p

I want to maximise a matrix , the size of which is 5 5, for example. Subject to the following constraints: . Also, there is an...

10 months ago | 0 answers | 0

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answersQuestion

copying the contents of a vector onto a longer vector

Let's say I have a vector a that is of size 4. I have a vector b of size 10. I want to copy the contents of vector a into b unti...

10 months ago | 1 answer | 0

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answerQuestion

Finding common elements in an array (even if they are not in the same position)

I have two vectors a and b. Both vectors may not be of the same length. I want to find the common elements between these vectors...

11 months ago | 1 answer | 0

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answerQuestion

getting the index after comparing two logicals

I compared two logicals and their results are as follows: a = [1 0 0 0 1] and b = [0 0 0 0 1] I wanted to compare these logical...

11 months ago | 2 answers | 0

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answersQuestion

Using switch to identify even or dd

Problem in brief: Print “Odd” if the argument is 1, 3, or 5, “Even” if the argument is 0, 2, or 4, and “Let me get back to you o...

11 months ago | 3 answers | 0

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answersQuestion

reversing the digits into a string

I have a list of numbers. l1 = randi([0,9],[1,10]); I want to make this into a string without the spaces and then reverse th...

11 months ago | 1 answer | 0

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answerSolved

Vector to 3-Column Matrix

Consider a vector *A* such as A = [1 2 3 3 4 5 6] Can you convert this vector to a three-column matrix like this: ...

11 months ago

Solved

Find the largest value in the 3D matrix

Given a 3D matrix A, find the largest value. Example >> A = 1:9; >> A = reshape(A,[3 1 3]); >> islargest(A) a...

11 months ago

Solved

Sum all integers from 1 to 2^n

Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.

11 months ago

Solved

Magic is simple (for beginners)

Determine for a magic square of order n, the magic sum m. For example m=15 for a magic square of order 3.

11 months ago

Solved

Roll the Dice!

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

11 months ago

Solved

Number of 1s in a binary string

Find the number of 1s in the given binary string. Example. If the input string is '1100101', the output is 4. If the input stri...

11 months ago

Solved

Return the first and last characters of a character array

Return the first and last character of a string, concatenated together. If there is only one character in the string, the functi...

11 months ago

Solved

Create times-tables

At one time or another, we all had to memorize boring times tables. 5 times 5 is 25. 5 times 6 is 30. 12 times 12 is way more th...

11 months ago

Solved

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...

11 months ago

Solved

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]; ...

11 months ago

Solved

Reverse the vector

Reverse the vector elements. Example: Input x = [1,2,3,4,5,6,7,8,9] Output y = [9,8,7,6,5,4,3,2,1]

11 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...

11 months ago

Solved

Length of the hypotenuse

Given short sides of lengths a and b, calculate the length c of the hypotenuse of the right-angled triangle. <<https://i.imgu...

11 months ago

Solved

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...

11 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...

11 months ago

Solved

Maximum value in a matrix

Find the maximum value in the given matrix. For example, if A = [1 2 3; 4 7 8; 0 9 1]; then the answer is 9.

11 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 ...

11 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:...

11 months ago

Question

how to count the number of occurrences of these numbers (with some conditions)

I have A(1,:) = [1, 2, 5, 2 , 1 , 2]; A(2,:) = [0,1,1,0,1,0]; I want to count the unique number of occurences in A(1,:) so t...

2 years ago | 2 answers | 0

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answersQuestion

randomly selecting an element without randsample

How do I randomly select an element without the machine learning toolbox function randsample?

2 years ago | 1 answer | 0

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answerQuestion

how to include a 'probability' when coding.

I wanted to include the concept of 'probability' when coding. For example, giving me a reward of +1 only 60% of the time. How do...

2 years ago | 1 answer | 0