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Thomas Lai


University of British Columbia

自 2012 起处于活动状态

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消息

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

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已解决


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

12 years 前

已解决


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

12 years 前

已解决


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...

12 years 前

已解决


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...

12 years 前

已解决


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...

12 years 前

已解决


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...

12 years 前

已解决


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...

12 years 前

已解决


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 ...

12 years 前

已解决


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

12 years 前

已解决


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...

12 years 前

已解决


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

12 years 前

已解决


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

12 years 前

已解决


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 ...

12 years 前

已解决


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:...

12 years 前

已解决


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 ...

12 years 前

已解决


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...

12 years 前

已解决


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...

12 years 前

已回答
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...

12 years 前 | 0

已回答
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...

12 years 前 | 0

提问


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...

12 years 前 | 0 个回答 | 0

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提问


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. ...

12 years 前 | 1 个回答 | 0

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个回答

已回答
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...

12 years 前 | 0