Developer at UBC's Seismic Laboratory for Imaging and Modelling, working on SPOT, pSPOT and SeisDataContainer

Professional Interests: SPOT, pSPOT, SeisDataContainer

Solved

Weighted average

Given two lists of numbers, determine the weighted average. Example [1 2 3] and [10 15 20] should result in 33.333...

environ 7 ans 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...

environ 7 ans 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...

plus de 7 ans ago

Solved

Fibonacci sequence

Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: Inpu...

plus de 7 ans 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...

plus de 7 ans 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...

plus de 7 ans 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...

plus de 7 ans 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 ...

plus de 7 ans ago

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...

plus de 7 ans ago

Solved

Determine if input is odd

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

plus de 7 ans 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 ...

plus de 7 ans 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:...

plus de 7 ans 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 ...

plus de 7 ans 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...

plus de 7 ans 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...

plus de 7 ans ago

Answered

I have a C++ class. How can I interface to it through a MATLAB class?

As far as I know, mex does not support object persistence past its basic predefined numeric classes. I tried returning the point...

I have a C++ class. How can I interface to it through a MATLAB class?

As far as I know, mex does not support object persistence past its basic predefined numeric classes. I tried returning the point...

plus de 7 ans ago | 0

Answered

Persistent Object in mex-File (Segmentation violation)

I have tried a very similar method in trying to get C++ object persistence, and even though I did declare global variables in th...

Persistent Object in mex-File (Segmentation violation)

I have tried a very similar method in trying to get C++ object persistence, and even though I did declare global variables in th...

plus de 7 ans ago | 0

Question

Overloading Numel

I have a need to overload numel for a data container class that i'm building. However it seems to break the overloaded subsref m...

presque 8 ans ago | 0 answers | 0

Question

spmd, composites and hidden overheads

I have a few questions regarding the inner workings of the spmd block that I wish PCT engineers would give some pointers on. ...

presque 8 ans ago | 1 answer | 0

Answered

Memory spike when using previously declared variable in spmd block

Hi Konrad, is there any way to get around the serialization limit of 2GB? Because, 2GB is much too small for any significant lar...

Memory spike when using previously declared variable in spmd block

Hi Konrad, is there any way to get around the serialization limit of 2GB? Because, 2GB is much too small for any significant lar...

presque 8 ans ago | 0