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How many Fibonacci numbers?
Find the number of unique Fibonacci numbers (don't count repeats) in a vector of positive integers. Example: x = [1 2 3 4...
5 years ago
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Fibonacci-Sum of Squares
Given the Fibonacci sequence defined by the following recursive relation, * F(n) = F(n-1) + F(n-2) * where F(1) = 1 and F(1)...
5 years ago
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Project Euler: Problem 2, Sum of even Fibonacci
Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 te...
5 years ago
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Return fibonacci sequence do not use loop and condition
Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: ...
5 years ago
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Find the next Fibonacci number
In the sequence of Fibonacci numbers, every number is the sum of the two preceding ones: 1, 1, 2, 3, 5, 8, 13, 21, 34, 55...
5 years ago
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Return the Fibonacci Sequence
Write a code which returns the Fibonacci Sequence such that the largest value in the sequence is less than the input integer N. ...
5 years ago
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Sum of first n terms of a harmonic progression
Given inputs a, d and n, return the sum of the first n terms of the harmonic progression a, a/(1+d), a/(1+2d), a/(1+3d),....
5 years ago
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Make an anonymous function that has variable output
Make a anonymous function that has variable output. f = @(x)... the following equation→equation(s) as followed has(ve) ...
5 years ago
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Project Euler: Problem 7, Nth prime
By listing the first six prime numbers: 2, 3, 5, 7, 11, and 13, we can see that the 6th prime is 13. What is the Nth prime nu...
5 years ago
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Alphabetize by last name
Given a list of names in a cell array, sort the list by the last name. So if list = {'Barney Google','Snuffy Smith','Dagwood ...
5 years ago
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Kaprekar Steps
6174 is the <http://en.wikipedia.org/wiki/6174_%28number%29 Kaprekar constant>. All natural numbers less than 10,000 (except som...
5 years ago
Answered
Error using + Matrix dimensions must agree.
In line 43, x(:,i) is a column vector, while k1' is a row vector. Summing a column vector and a row vector is not allowed in ol...
Error using + Matrix dimensions must agree.
In line 43, x(:,i) is a column vector, while k1' is a row vector. Summing a column vector and a row vector is not allowed in ol...
5 years ago | 0
Answered
Golden Section Search algorithm, golden number why is 0.381
Let and be the end points of the current range. In golden ratio search we choose a new point such that the ratio of the two ...
Golden Section Search algorithm, golden number why is 0.381
Let and be the end points of the current range. In golden ratio search we choose a new point such that the ratio of the two ...
5 years ago | 1
Answered
Problem relating to mathematical expression
Ameer's answer is correct, of course. Here is another approach, without the elegant Matlab functions: N = 5; % Max window size...
Problem relating to mathematical expression
Ameer's answer is correct, of course. Here is another approach, without the elegant Matlab functions: N = 5; % Max window size...
5 years ago | 0
Answered
Help text does not work for user-defined functions
Problem solved - finally! My Matlab 2019b and 2020a installations had several other odd behaviours in addition to the help prob...
Help text does not work for user-defined functions
Problem solved - finally! My Matlab 2019b and 2020a installations had several other odd behaviours in addition to the help prob...
5 years ago | 3
| accepted
Answered
Solution for system of two non linear equation
You can rewrite you equations as (Nd-x-y)-a*(x*(x+y)) = 0 (Nd-x-y)*(No-y)-b*(y*(x-y)) = 0 where x = Nd, y = Nonegative, a = ...
Solution for system of two non linear equation
You can rewrite you equations as (Nd-x-y)-a*(x*(x+y)) = 0 (Nd-x-y)*(No-y)-b*(y*(x-y)) = 0 where x = Nd, y = Nonegative, a = ...
5 years ago | 1
| accepted
Answered
Problem of erf when using fmincon
Your problem has infinitely many solutions. Whenver x(1)-x(3) = 1 and x(2)-x(4) = 1, fun = 0, which is the minimum value possib...
Problem of erf when using fmincon
Your problem has infinitely many solutions. Whenver x(1)-x(3) = 1 and x(2)-x(4) = 1, fun = 0, which is the minimum value possib...
5 years ago | 0
Answered
how to Nonlinear equations?(two variables)
Although R1 and R2 are nonlinear finctions of t, your equations are linear in x. So you write the equations on the form A(t)*...
how to Nonlinear equations?(two variables)
Although R1 and R2 are nonlinear finctions of t, your equations are linear in x. So you write the equations on the form A(t)*...
6 years ago | 2
| accepted
Answered
How to count number of times a number appears in column B based on column A
letters = 'ABAACD'; numbers = [1,2,2,1,1,3]; uniqueletters = unique(letters); uniquenumbers = unique(numbers); n = length(un...
How to count number of times a number appears in column B based on column A
letters = 'ABAACD'; numbers = [1,2,2,1,1,3]; uniqueletters = unique(letters); uniquenumbers = unique(numbers); n = length(un...
6 years ago | 0
| accepted
Submitted
nistdata(species,T,p)
Create tables of thermophysical properties for gases
6 years ago | 5 downloads |
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Van der Waals equation - Newton's method
In your code, newton_ndim does not know the value of T and so cannot call fun(X,T). You can probably fix this by defining an in...
Van der Waals equation - Newton's method
In your code, newton_ndim does not know the value of T and so cannot call fun(X,T). You can probably fix this by defining an in...
6 years ago | 0
| accepted
Solved
How Far Can You Throw Something?
As you probably learned in your high school physics class, throwing an object at a 45 degree angle will give you the maximum ran...
6 years ago
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Calculate the height of an object dropped from the sky
Assume that an object is dropped from 1000 meters above the surface of the earth at time t=0. The object is dropped such that t...
6 years ago
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Distance of the centroids of the balls
Given *n* balls of radius *r* and the vector *p (nx3)* with all position *(x,y,z)* of the balls, return the symmetric matrix *A ...
6 years ago
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Calculate compression ratio of engine
Calculate compression ratio of engine given compression volume of cylinder(Vc), piston stroke(s) and valve diameter(d)
6 years ago
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Elastic Collision 001: 1-D
Elastic Collision of two particles. <http://en.wikipedia.org/wiki/Elastic_collision wiki Elastic Collision> Solve Conservat...
6 years ago
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Center of mass
Given a matrix M(m,n), where m is the number of vertices of the geometrical element and n is 2 or 3 (2D-plane figure or 3D-solid...
6 years ago
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center of mass
R is a given matrix with size [n,2]. R(i,:) is interpreted as the 2D-position of a mass point with mass i. Calculate the center ...
6 years ago
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Determine if a four bar mechanism is of Grashof type
A four bar mechanism is composed of four links. if s is the smallest link, l the longest and p,q are the length of the other lin...
6 years ago
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Find the jerk
No, it's not the author of this problem... Jerk is the rate of change in acceleration over time of an object. So, if given t...
6 years ago