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Question
Customizing tab completion
I have a function that accepts paired name/value arguments, e.g. solve(A,b,'accuracy',1e-13,'method','LU','threshold',1e-...
meer dan 13 jaar ago | 1 answer | 0
1
answerProblem
Column norms of a matrix
Given a matrix M, return a vector y such that for each k y(k)=norm(M(:,k)) (y(k) is the Euclidean norm of the k-th col...
meer dan 13 jaar ago | 9 | 537 solvers
Solved
Sort a list of complex numbers based on far they are from the origin.
Given a list of complex numbers z, return a list zSorted such that the numbers that are farthest from the origin (0+0i) appear f...
meer dan 13 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".
meer dan 13 jaar ago
Solved
Column norms of a matrix
Given a matrix M, return a vector y such that for each k y(k)=norm(M(:,k)) (y(k) is the Euclidean norm of the k-th col...
meer dan 13 jaar ago
return value optimization when overwriting
It seems that you can indeed, see http://blogs.mathworks.com/loren/2007/03/22/in-place-operations-on-data/? I cannot understa...
meer dan 13 jaar ago | 0
Question
overloading x=[a b; c d]
Suppose a,b,c,d are instances of a custom Matlab class. I can redefine [a b] and [a;b] by overloading horzcat() and vertcat(); h...
meer dan 13 jaar ago | 1 answer | 2
1
answerSolved
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...
meer dan 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...
meer dan 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...
meer dan 13 jaar 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...
meer dan 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 ...
meer dan 13 jaar ago
Solved
Sum all integers from 1 to 2^n
Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.
meer dan 13 jaar ago
Solved
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
meer dan 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.
meer dan 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:...
meer dan 13 jaar ago
Question
return value optimization when overwriting
Consider the following scenario. function A=frobnicate(A) A(1)=1; end X=zeros(2000,2000); X=frobnicate(X); ...
meer dan 13 jaar ago | 2 answers | 0
2
answersQuestion
Detecting "a and b are the same variable" in O(1) via pointers
I know Matlab uses copy-on-write; that is, if I assign |a=b| and then never modify |a| and |b|, they point to the same chunk of ...
meer dan 13 jaar ago | 2 answers | 0
2
answersQuestion
GLOBAL could be very inefficient
I am using a GLOBAL statement inside an if command, so that I import the global variable into the local namespace only if it is ...
ongeveer 14 jaar ago | 1 answer | 0
1
answerQuestion
GLOBAL could be very inefficient
I am using the GLOBAL instruction inside an if statement, to create a global variable only if it is needed. However, the code an...
ongeveer 14 jaar ago | 0 answers | 0
