Triangle Numbers
Triangle numbers are the sums of successive integers. So 6 is a triangle number because
6 = 1 + 2 + 3
which can be displayed ...
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Generate a vector like 1,2,2,3,3,3,4,4,4,4
Generate a vector like 1,2,2,3,3,3,4,4,4,4
So if n = 3, then return
[1 2 2 3 3 3]
And if n = 5, then return
[1 2 2 3 3 3 4...
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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...
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Finding Perfect Squares
Given a vector of numbers, return true if one of the numbers is a square of one of the numbers. Otherwise return false.
Example...
Flipping
Write code that can reverse the vector without using any sort of loop.
Example
Given the input vector
A = [ 1 2 3 4 5...
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Flip the diagonal values
Write a program that flip the elements of main diagonal , upper and lower diagonal values of a sqare matrix.
For example if a ...
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Flip the bit
Given an input character string (e.g. '1001'), return a character string with the bits flipped ('0110').
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Flipping a Matrix
Flipping matrix up and down.
If a central row is exists, leave it, and flip remaining rows.
Example
Mat = magic(3)
...
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Is A the inverse of B?
Given a matrix A and a matrix B, is A the inverse of B?
>>A=[2,4;3,5];
>>B=[-2.5,2;1.5,-1];
>>isInverse...
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Rotate Matrix @180 degree
Rotate Matrix @180 degree
Example
A=[8 1 6; 3 5 7; 4 9 2], then answer would be
[2 9 4;...
swap sign sum & multiply castles
It is an easy problem, if you know the answer.
Given a square matrix of NxN ordinary numbers.
Initially place N identical indi...
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Swap two numbers
Example
Input:
a = 10
b = 20
Output
a = 20
b = 10
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Half-Swap
Given a vector with an even number of elements,
rearrange it so that the elements in its first
half are switched with those i...
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Matlab Basics - Switching Assignments
Switch assignments for variables x and y, for example
start with x = 1 and y = 3
end with y = 1 and x = 3
Do NOT simply r...
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Swap between columns
The idea is to swap between second and second last column
Ex = [1 2 3 4 5;
1 2 3 4 5;
1 2 3 4 5;
1 2 3 4 5;
...
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Remove a specific character with another
Remove any (-) dash sign with (_) underscore
Ex = 'The-Journey-of-thoudsands-miles-starts-with-a-single-step'
y = 'The_Jour...