# David David

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**Content Feed**

Solved

Find the maximum number of decimal places in a set of numbers

Given a vector or matrix of values, calculate the maximum number of decimal places within the input. Trailing zeros do not coun...

1 month ago

Solved

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...

1 month ago

Solved

Project Euler: Problem 1, Multiples of 3 and 5

If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23...

1 month ago

Solved

Make roundn function

Make roundn function using round. x=0.55555 y=function(x,1) y=1 y=function(x,2) y=0.6 y=function(x,3) ...

1 month ago

Solved

Rounding off numbers to n decimals

Inspired by a mistake in one of the problems I created, I created this problem where you have to round off a floating point numb...

1 month ago

Solved

Matlab Basics - Rounding III

Write a script to round a large number to the nearest 10,000 e.g. x = 12,358,466,243 --> y = 12,358,470,000

1 month ago

Solved

Matlab Basics - Rounding II

Write a script to round a variable x to 3 decimal places: e.g. x = 2.3456 --> y = 2.346

1 month ago

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Check that number is whole number

Check that number is whole number Say x=15, then answer is 1. x=15.2 , then answer is 0. http://en.wikipedia.org/wiki/Whole_numb...

1 month ago

Solved

MATLAB Basic: rounding IV

Do rounding towards plus infinity. Example: -8.8, answer -8 +8.1 answer 9 +8.50 answer 9

1 month ago

Solved

MATLAB Basic: rounding III

Do rounding towards minus infinity. Example: -8.8, answer -9 +8.1 answer 8 +8.50 answer 8

1 month ago

Solved

MATLAB Basic: rounding II

Do rounding nearest integer. Example: -8.8, answer -9 +8.1 answer 8 +8.50 answer 9

1 month ago

Solved

MATLAB Basic: rounding

Do rounding near to zero Example: -8.8, answer -8 +8.1 answer 8

1 month ago

Solved

Set the array elements whose value is 13 to 0

Input A either an array or a vector (which can be empty) Output B will be the same size as A . All elements of A equal to 13...

1 month ago

Solved

Sum of diagonal of a square matrix

If x = [1 2 4; 3 4 5; 5 6 7] then y should be the sum of the diagonals of the matrix y = 1 + 4 + 7 = 12

1 month ago

Solved

Reverse the elements of an array

Reverse the order of elements in an array: eg: input X = [ 1 2 3 ; 4 5 6 ; 7 8 9 ] o...

1 month ago

Solved

Matlab Basics - Absolute Value

Write a script that returns the absolute value of the elements in x e.g. x = [-1 -2 -3 -4] --> y = [1 2 3 4]

1 month ago

Solved

Determine if input is odd

Given the input n, return true if n is odd or false if n is even.

1 month ago

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Recursion at variable input

input of any length a =2 b =2 c =3 output = (a^b)^c = 64

1 month ago

Solved

Can we make a triangle?

Given three positive number, check whether a triangle can be made with these sides length or not. remember that in a triangle su...

1 month ago

Solved

Find the sides of an isosceles triangle when given its area and height from its base to apex

Find the sides of an isosceles triangle when given its area and the height from its base to apex. For example, with A=12 and ...

1 month ago

Solved

Height of a right-angled triangle

Given numbers a, b and c, find the height of the right angled triangle with sides a and b and hypotenuse c, for the base c. If a...

2 months ago

Solved

Right Triangle Side Lengths (Inspired by Project Euler Problem 39)

If _p_ is the perimeter of a right angle triangle with integral length sides, { _a_, _b_, _c_ }, there are exactly three solutio...

2 months ago

Solved

Calculate the area of a triangle between three points

Calculate the area of a triangle between three points: P1(X1,Y1) P2(X2,Y2) P3(X3,Y3) these three points are the vert...

2 months ago

Solved

Find my daddy long leg (No 's')

Given the ratio of the two legs (longer / shorter), and the hypotenuse length, find the value of the bigger leg.

2 months ago

Solved

Vector creation

Create a vector using square brackets going from 1 to the given value x in steps on 1. Hint: use increment.

2 months ago

Solved

Doubling elements in a vector

Given the vector A, return B in which all numbers in A are doubling. So for: A = [ 1 5 8 ] then B = [ 1 1 5 ...

2 months ago

Solved

Flip the vector from right to left

Flip the vector from right to left. Examples x=[1:5], then y=[5 4 3 2 1] x=[1 4 6], then y=[6 4 1]; Request not ...

2 months ago

Solved

Whether the input is vector?

Given the input x, return 1 if x is vector or else 0.

2 months ago