Bruce Raine

Last seen: 8 mois il y a | Actif depuis 2010

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I like to solve most kinds of maths problems that I come across. I have used MATLAB for around 7 years and really enjoy programming it to solve maths and statistics problems. I hold a Masters degree entitled: Master of Computing and Mathematical Sciences (Hons). Professional Interests: Maths and Programming

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Frobenius Norm
Write your own version of Frobenius Norm without using the 'norm' function.

plus de 11 ans il y a

Problème

Frobenius Norm
Write your own version of Frobenius Norm without using the 'norm' function.

plus de 11 ans il y a | 1 | 93 solveurs

A résolu

Simple date to serial no. conversion
Convert a date string to a serial date number. For example if you take x='19-May-2001' then the result is 730990 x...

plus de 11 ans il y a

A résolu

Find the definite integral of various linear functions
A definite integral had a minimum and maximum limit. When you solve this type of problem you must use both quad and the trapz fu...

plus de 11 ans il y a

Problème

Find the definite integral of various linear functions
A definite integral had a minimum and maximum limit. When you solve this type of problem you must use both quad and the trapz fu...

plus de 11 ans il y a | 1 | 53 solveurs

Problème

How long do each of the stages of the rocket take to burn?
A space rocket has 3 stages: - stage 1, s1; - stage 2, s2; - stage 3, s3. If s1 burns 3 x as long as s2 which burns ...

plus de 11 ans il y a | 2 | 301 solveurs

A résolu

How long do each of the stages of the rocket take to burn?
A space rocket has 3 stages: - stage 1, s1; - stage 2, s2; - stage 3, s3. If s1 burns 3 x as long as s2 which burns ...

plus de 11 ans il y a

Problème

Find the nearest integer
Given a vector of integers and a real number find the closest integer. EX: >> a = [2 4 5 6 8 10]; >> b = 4.6; >> nea...

presque 12 ans il y a | 3 | 347 solveurs

A résolu

Find the nearest integer
Given a vector of integers and a real number find the closest integer. EX: >> a = [2 4 5 6 8 10]; >> b = 4.6; >> nea...

presque 12 ans il y a

Problème

How many days does the cat take to climb out of the hole?
A cat accidentally falls down a hole with sloping but rough sides. It can climb out of the hole of height h metres, but for ever...

presque 12 ans il y a | 4 | 77 solveurs

A résolu

How many days does the cat take to climb out of the hole?
A cat accidentally falls down a hole with sloping but rough sides. It can climb out of the hole of height h metres, but for ever...

presque 12 ans il y a

A résolu

Penny flipping - calculate winning probability (easy)
Two players are playing a fair penny flipping game. For each flip, the winner adds one penny from the loser's collection to his/...

presque 12 ans il y a

A résolu

Sorted highest to lowest?
Return 1 if the input is sorted from highest to lowest, 0 if not. Example: 1:7 -> 0 [7 5 2] -> 1

presque 12 ans il y a

A résolu

inner product of two vectors
inner product of two vectors

presque 12 ans il y a

A résolu

Bottles of beer
Given an input number representing the number of bottles of beer on the wall, output how many are left if you take one down and ...

presque 12 ans il y a

A résolu

radius of a spherical planet
you just measured its surface area, that is the input.

presque 12 ans il y a

A résolu

Swap the input arguments
Write a two-input, two-output function that swaps its two input arguments. For example: [q,r] = swap(5,10) returns q = ...

presque 12 ans il y a

A résolu

Multiply a column by a row
* Given a column vector C and and a row vector R. * Output a matrix M. * Every column of M equals to C multiplied by correspon...

presque 12 ans il y a

A résolu

Distance walked 1D
Suppose you go from position 7 to 10 to 6 to 4. Then you have walked 9 units of distance, since 7 to 10 is 3 units, 10 to 6 is 4...

presque 12 ans il y a

A résolu

Extract leading non-zero digit
<http://en.wikipedia.org/wiki/Benford%27s_law Benford's Law> states that the distribution of leading digits is not random. This...

presque 12 ans il y a

A résolu

Replace multiples of 5 with NaN
It is required to replace all values in a vector that are multiples of 5 with NaN. Example: input: x = [1 2 5 12 10 7] ...

presque 12 ans il y a

A résolu

Will there be a new leader?
Simply answer the title.

presque 12 ans il y a

A résolu

The Answer to Life, the Universe, and Everything
A variation of a previous Hitchhiker's Guide to the Galaxy problem. *Inputs:* Life, the Universe, and Everything *Output:*...

presque 12 ans il y a

A résolu

Rotate a Matrix by 90 degrees
Rotate a Matrix by 90 degrees Example: If the input is: X = 1 2 3 4 5 6 7 8 9 ...

plus de 12 ans il y a

A résolu

Convert from Base 10 to base 5
Convert the input number from base 10 into base 5: for example: if a(in base 10)= 5 then a(in base 5)= 10

plus de 12 ans il y a

A résolu

Matrix indexing with two vectors of indices
Given a matrix M and two index vectors a and b, return a row vector x where x(i) = M(a(i),b(i)).

plus de 12 ans il y a

A résolu

Compute a dot product of two vectors x and y
x and y are input vectors, d is a number and contains their dot product

plus de 12 ans il y a

A résolu

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

plus de 12 ans il y a

Problème

Is A the inverse of B?
Given a matrix A and a matrix B, is A the inverse of B? >>A=[2,4;3,5]; >>B=[-2.5,2;1.5,-1]; >>isInverse...

plus de 12 ans il y a | 13 | 939 solveurs

A résolu

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),....

plus de 12 ans il y a

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Bruce Raine

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