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Test if a matrix is symmetric
Write a logical function that returns 1 if the input matrix is symmetric and 0 otherwise.

9 years ago

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design a magic matrix without using the command magic.
Like magic(4) = 16 3 2 13;5 10 11 8;9 6 7 12;4 15 14 1

9 years ago

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Find the index of n in magic(n)
If input n=5, then magic(n) is 17 24 1 8 15 23 5 7 14 16 4 6 13 20 22...

9 years ago

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Flip the main diagonal of a matrix
Given a n x n matrix, M, flip its main diagonal. Example: >> M=magic(5); >> flipDiagonal(M) 9 24 1 ...

9 years ago

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Change the first and last diagonal element of the identity matrix to zero
Starting with the identity matrix, change first and last diagonal element to zero. Example If n=5 A = 0 0 ...

9 years ago

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Compute LOG(1+X) in natural log
Compute LOG(1+X) in natural log

9 years ago

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Find the Nth Root of a Given Number
Find the Nth root of a given number x. Examples x = 4096 n = 4 y = 8 x = 625 n = 5 y = 3.6239

9 years ago

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Sum of the Matrix Elements
Add up all the elements in a NxM matrix where N signifies the number of the rows and M signifies the number of the columns. E...

9 years ago

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Positive Infinity
Round the array a towards positive infinity

9 years ago

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Swap two numbers
Example Input: a = 10 b = 20 Output a = 20 b = 10

9 years ago

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Given a 4x4 matrix, swap the two middle columns
If a = [1 2 3 4; 1 2 3 4; 1 2 3 4; 1 2 3 4]; then the result is ans = 1 3 2 4 1 3 2...

9 years ago

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Return 'on' or 'off'
When the input is true, return 'on', otherwise, return 'off'.

9 years ago

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Number of 1s in the Binary Representation of a Number
*Description* Return the number of 1s in the (unsigned integer) binary representation of a number. This function should be ab...

9 years ago

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Append two matrix as shown below example
Append two matrix as shown below example A=[1 2; 3 4] and B=[5 6;7 8] Answer must be 1 2 5 6 3...

9 years ago

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Negative matrix
Change the sign of all elements in given matrix.

9 years ago

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Sum the entries of each column of a matrix which satisfy a logical condition.
Given a numeric matrix A and a logical array L of the same size as A, return a row vector S containing the columnwise sums of th...

9 years ago

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"mirror" matrix
Create n x 2n "mirror" matrix of this type: e.g. for n = 2 m = [1 2 2 1;1 2 2 1] e.g. for n = 3 m = [1 2 3 3 2 1...

9 years ago

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First non-zero element in each column
For a given matrix, calculate the index of the first non-zero element in each column. Assuming a column with all elements zero ...

9 years ago

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Omit columns averages from a matrix
Omit columns averages from a matrix. For example: A = 16 2 3 13 5 11 10 8 9 7 ...

9 years ago

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Find the sum of the elements in the "second" diagonal
Find the sum of the elements in the diagonal that starts at the top-right corner and ends at the bottom-left corner.

9 years ago

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Your favourite city!
Type your favourite city.

9 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...

9 years ago

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Calculate this one!
Using matlab calculate y y=(e^2)+100/20+sin(pi)*x Use x as a input.

9 years ago

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Calculate gradient
x=1:0.1:5; y=@(x)x^2; calculate gradient (dy/dx) using numerical method. This means dydx(i)=(y(i+1)-y(i))/(x(i+1)-x...

9 years ago

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Change matrix to vector2
From x = 4 3 5 1 5 1 To y = 4 3 5 1 ...

9 years ago

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Calculate some equation
Using given inputs x and z, make two outputs that are y1 = (xz)/(x/z)^2 + 14x^2 - 0.8z^2 y2 = x^z - z^x + (x/z)^2 - (z/x...

9 years ago

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Calculate polynomial equation
Calculate this equation using given x 1+x+x^2+x^3+....x^99 (hint: use polyval)

9 years ago

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Solve the system of linear equations
4x - 2y +6z=8 2x + 8y +2z=4 6x + 10y +3z=0 Input is each coefficient of polynomial. For example, a=[4 ...

9 years ago

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Calculate circle's property
[A R]=function(r) r is radius, A is area of circles, R is circumference. A=pi*r^2 R=2*pi*r

9 years ago

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Determine point is located in a circle or not
Using input [x] and [y], determine the points (x,y) is located inside of circle (x^2+y^2=1) if point is located in circle,...

9 years ago