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Sam Roberts


XMW Consulting

Last seen: bijna 5 jaar ago |  Active since 2011

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XMW Consulting provides consultancy services in the areas of data mining and statistical analysis, specializing in the development of technical algorithms and applications with MATLAB®. http://www.xmwconsulting.co.uk http://www.xmwconsulting.co.uk/backslashblog http://www.linkedin.com/in/samroberts http://www.twitter.com/sllroberts Professional Interests: Data Mining | Statistics | MATLAB | Consultancy

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Find the numeric mean of the prime numbers in a matrix.
There will always be at least one prime in the matrix. Example: Input in = [ 8 3 5 9 ] Output out is 4...

meer dan 12 jaar ago

Solved


Check if sorted
Check if sorted. Example: Input x = [1 2 0] Output y is 0

meer dan 12 jaar ago

Solved


The Hitchhiker's Guide to MATLAB
Output logical "true" if the input is the answer to life, the universe and everything. Otherwise, output logical "false".

bijna 13 jaar ago

Solved


Remove any row in which a NaN appears
Given the matrix A, return B in which all the rows that have one or more <http://www.mathworks.com/help/techdoc/ref/nan.html NaN...

bijna 13 jaar ago

Solved


Finding Perfect Squares
Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...

bijna 13 jaar ago

Solved


Determine whether a vector is monotonically increasing
Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

bijna 13 jaar ago

Solved


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

bijna 13 jaar ago

Solved


Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

bijna 13 jaar ago

Question


Force doc command to open a specified reference HTML page
Say I've written a class in a package, called mypackage.myclass. I've written my own HTML documentation for the package and ...

bijna 13 jaar ago | 0 answers | 3

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answers

Solved


Triangle Numbers
Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

ongeveer 13 jaar ago

Solved


Swap the first and last columns
Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

ongeveer 13 jaar ago

Solved


Find all elements less than 0 or greater than 10 and replace them with NaN
Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

ongeveer 13 jaar ago

Solved


Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Example...

ongeveer 13 jaar ago

Solved


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

ongeveer 13 jaar ago

Solved


Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

ongeveer 13 jaar ago

Solved


Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

ongeveer 13 jaar ago

Solved


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

ongeveer 13 jaar ago

Solved


Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

ongeveer 13 jaar 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...

ongeveer 13 jaar ago

Solved


Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

ongeveer 13 jaar ago

Question


Defining additional infix operators in MATLAB
Is there a way to define additional infix operators in MATLAB? Specifically, I'd like to define two infix operators "->" and ...

meer dan 13 jaar ago | 1 answer | 0

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answer

Answered
changing color while using 'hist' in a bar-plot
Try: h = bar(y,'hist'); set(h,'FaceColor','r','EdgeColor','r'); If you take a look at the <http://www.mathworks.co.uk/help...

meer dan 13 jaar ago | 2

| accepted

Answered
Problems starting Excel server
I ran into a similar issue recently. Are you working with the Click-to-Run edition of Microsoft Office? The click-to-run edit...

meer dan 13 jaar ago | 3