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Doddy Kastanya


Last seen: 1 day ago
990 total contributions since 2017

I love math and physics. Being a nuclear engineer keeps this alive.

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Solved


Taxicab distance

1 day ago

Solved


Sum multiples

1 day ago

Solved


Period of a pendulum

1 day ago

Problem


Period of a pendulum

1 day ago | 0 | 2 solvers

Solved


Angular Velocity

1 day ago

Problem


Angular Velocity

1 day ago | 0 | 2 solvers

Solved


Vector parallel to plane?
Given the coefficients of the equation which defines a plane as follows: ax+by+cz=d, return a boolean indicating whether the 2n...

2 days ago

Solved


Area of Cylindrical Shell

2 days ago

Problem


Area of Cylindrical Shell

2 days ago | 0 | 3 solvers

Solved


Volume of Cylindrical Shell

2 days ago

Problem


Volume of Cylindrical Shell

2 days ago | 0 | 3 solvers

Solved


Polygon in a unit circle

2 days ago

Solved


Prime Ladders
A <http://en.wikipedia.org/wiki/Word_ladder word ladder> transforms one word to another by means of single-letter mutations. So ...

2 days ago

Solved


Twin Primes
Twin primes are pairs of primes that are immediately next to each other (difference of two). The lesser of twin primes are 3, 5,...

2 days ago

Solved


Prime factor digits
Consider the following number system. Calculate the prime factorization for each number n, then represent the prime factors in a...

2 days ago

Solved


Find the Oldest Person in a Room
Given two input vectors: * |name| - user last names * |age| - corresponding age of the person Return the name of the ol...

3 days ago

Answered
solve large sparse jacobian matrix (with an example)
I assume that the Jacobian matrix is needed as a part of implementing Newton's method to solve system of non-linear equations. F...

5 days ago | 0

Answered
Matlab function solve number pattern
The following code listing should do it (ignore the zeros in the output): cnt=0; for i=1:5 for j=1:i cnt=cnt+1; ...

5 days ago | 0

Answered
symbolic system of equations matlab
You might want to check out the information in the following link https://www.mathworks.com/help/symbolic/solve-a-system-of-alge...

5 days ago | 0

Answered
Multiplication between matrices with different dimensions
Your loop is in terms of "w"; however, in the loop "w" is not used at all. Shouldn't "i" be "w"? The pseudoinverse matrix can b...

5 days ago | 0

Answered
Newton's Optimization Method
The following link provides information about Hessian Matrix for a scalar function: https://www.mathworks.com/help/symbolic/hess...

5 days ago | 0

Solved


Is it an Armstrong number?
An Armstrong number of three digits is an integer such that the sum of the cubes of its digits is equal to the number itself. Fo...

5 days ago

Solved


Which quadrant?
Given a complex number, output quadrant 'I' 'II' 'III' or 'IV' | II | I | ...

5 days ago

Solved


Return the 3n+1 sequence for n
A Collatz sequence is the sequence where, for a given number n, the next number in the sequence is either n/2 if the number is e...

5 days ago

Solved


Spot the First Occurrence of 5
This problem series invites you to solve two simple problems related to the integer NUMBER FIVE, in order to celebrate <https://...

5 days ago

Answered
Plotting a graph on MATLAB
In order to see more "dots", you need to add "hold on" on the line after plot. However, since you want to plot it against the nu...

5 days ago | 0

Answered
Add title to subplot (a), (b), (c) with already existing titles for parameters.
You might want to take a look at this posting: https://www.mathworks.com/matlabcentral/fileexchange/85453-subplotlabel/?s_tid=ml...

5 days ago | 0

| accepted

Answered
Add title to subplot (a), (b), (c) with already existing titles for parameters.
You probably could add the "(a)" (or b, c, d, e, or f) before specifying the beta_e and t_f in the title section.

5 days ago | 0

Answered
for loop issue not all answer printing out
Hi Anastasia, The problem is you did not store the results as a vector; therefore, when you printed out the table, only the las...

5 days ago | 0

| accepted

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