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Natalya Kavetska

21 total contributions since 2016

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Solved

What do you get if you multiply six by nine?
The Hitchhiker's Guide to the Galaxy based task. Tip: n-base numeral system

4 years ago

Solved

Graph is undirected. (s,t) in node pairs. Please, return full storage version of the matrix.(use _full(A)_ ) Input: s...

4 years ago

Solved

Find the Sum of the Series:
<<https://psv4.vk.me/c810428/u48725350/docs/03e9821af0aa/for.jpg?extra=iyw_6UQfL0GhDJ2NtppzhQFjAvaCe79tBk0IIpSRcn5jRJvUgdAe4u7KP...

4 years ago

Solved

Find the sum of the negative elements under the main diagonal.
Example Input A=[1 2; -3 0] Output -3

4 years ago

Solved

Solve the system of equations.
_Ax=b_ * _A_ - square coefficient matrix * _b_ - right side column vector Find vecor _x_.

4 years ago

Solved

Numerate input arguments
For every input, output the number. Example: [a, b] = Test('first', 'second') a=1; b=2;

4 years ago

Solved

Find area.
Suppose <<https://www.mathworks.com/help/examples/matlab/ImproperIntegralExample_eq17103907294130514984.png>> b=Inf. Fi...

4 years ago

Solved

Calculate the eigenvalues of A.
Calculate the sum of the eigenvalues of A. If it's odd return cubed else return 54.

4 years ago

Solved

Find the product of the positive elements above the main diagonal.
Example Input A=[1 2; -3 0] Output 2

4 years ago

Solved

Return amount of palindromes in the string.
Example Input: s='eye story pop dictionary noon enjoy software moon' Output: amount=3

4 years ago

Solved

Calculate the centroid of a triangle
Info: https://en.wikipedia.org/wiki/Centroid Example Input: x = [0 0 1]; % x-coordinate y = [0 1 0]; % y-coordinat...

4 years ago

Solved

Find matrix of indices for multidimensional matrix.
Given some multidimensional matrix A. Get a matrix of the same size as A where all elements are replaced by their index along th...

4 years ago

Solved

Create cotangent function out of sine.
Please, don't use cos, tan, cot matlab functions.

4 years ago

Solved

Return the length of the longest word in the string.
Example: Input s='A fractal is a natural phenomenon or a mathematical set that exhibits a repeating pattern that display...

4 years ago

Solved

Check if a string starts with another string
Input s='He was so tired' q='He' Output ans = true

4 years ago

Solved

Return ! if array element starts with a certain letter. Otherwise return ?
Input x=['try' 'once' 'more']; s='t' Output ans='!' Input x=['try' 'once' 'more']; s='O' Output ...

4 years ago

Solved

Solve the following boundary value problem
Return the sum of sum(res.y) y"+|y|=0 y(0)=a y(4)=b Tip: use bvp4c

4 years ago

Solved

Is my wife right?
Regardless of input, output the string 'yes'.

4 years ago

Solved

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

4 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...

4 years ago

Question

How to get second derivative in symblolic toolbox?
my expretion = cos(x*t^2)+x^2+4*t^3); how to get second derivative by t?

4 years ago | 1 answer | 1