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Frage
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-...
fast 14 Jahre vor | 1 Antwort | 0
1
AntwortProblem
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...
fast 14 Jahre vor | 9 | 552 Lösungsvorschläge
Gelöst
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...
fast 14 Jahre vor
Gelöst
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".
fast 14 Jahre vor
Gelöst
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...
fast 14 Jahre vor
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...
fast 14 Jahre vor | 0
Frage
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...
fast 14 Jahre vor | 1 Antwort | 2
1
AntwortGelöst
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...
fast 14 Jahre vor
Gelöst
Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...
fast 14 Jahre vor
Gelöst
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...
fast 14 Jahre vor
Gelöst
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...
fast 14 Jahre vor
Gelöst
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 ...
fast 14 Jahre vor
Gelöst
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.
fast 14 Jahre vor
Gelöst
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
fast 14 Jahre vor
Gelöst
Determine if input is odd
Given the input n, return true if n is odd or false if n is even.
fast 14 Jahre vor
Gelöst
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:...
fast 14 Jahre vor
Frage
return value optimization when overwriting
Consider the following scenario. function A=frobnicate(A) A(1)=1; end X=zeros(2000,2000); X=frobnicate(X); ...
fast 14 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
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 ...
fast 14 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
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 ...
etwa 14 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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...
etwa 14 Jahre vor | 0 Antworten | 0
