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Last seen: ungefär 2 månader ago Active since 2021

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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...

nästan 2 år ago | 1 answer | 0

1

answer

Question


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...

nästan 2 år ago | 0 answers | 0

0

answers

Question


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...

nästan 2 år ago | 1 answer | 0

1

answer

Question


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...

nästan 2 år ago | 1 answer | 0

1

answer

Question


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...

nästan 2 år ago | 2 answers | 0

2

answers

Question


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...

nästan 2 år ago | 3 answers | 0

3

answers

Question


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...

nästan 2 år ago | 1 answer | 0

1

answer

Solved


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: ...

nästan 2 år 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...

nästan 2 år 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.

nästan 2 år 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.

nästan 2 år ago

Solved


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

nästan 2 år 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...

nästan 2 år 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...

nästan 2 år 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...

nästan 2 år 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...

nästan 2 år 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]; ...

nästan 2 år 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]

nästan 2 år 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...

nästan 2 år 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...

nästan 2 år 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...

nästan 2 år 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...

nästan 2 år ago

Solved


Return area of square
Side of square=input=a Area=output=b

nästan 2 år 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.

nästan 2 år 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 ...

nästan 2 år ago

Solved


Add two numbers
Given a and b, return the sum a+b in c.

nästan 2 år 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:...

nästan 2 år 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...

ungefär 3 år ago | 2 answers | 0

2

answers

Question


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

ungefär 3 år ago | 1 answer | 0

1

answer

Question


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...

ungefär 3 år ago | 1 answer | 0

1

answer

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