Naor Movshovitz
University of California, Santa Cruz
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Professional Interests: physical modeling; rigid-body dynamics; granular mechanics; planetary collisions
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Question
Documentation error for polyval ouput?
The documentation for polyval describes the optional output argument delta like this: "Standard error for prediction, returned ...
nästan 5 år ago | 1 answer | 0
1
answerSubmitted
headcount(file_name, header_mark)
Return number of header lines in text file.
mer än 5 år ago | 1 download |
Submitted
nmovshov/physunits
Dimensioned variables with enforced dimensional consistency
mer än 6 år ago | 1 download |
Solved
Energy of a photon
Given the frequency F of a photon in giga hertz. Find energy E of this photon in giga electron volts. Assume h, Planck's ...
nästan 7 år ago
Solved
How to subtract?
* Imagine you need to subtract one number from another using MATLAB. * You will not be using eval for this task. * Given two A...
nästan 7 år ago
Question
Huge overhead in fsolve due to fsolve>createExitMsg()
Is it just me or is the fancy exit messaging in |fsolve| creating huge overhead?I imagine this might impact other |optim| toolbo...
nästan 7 år ago | 2 answers | 4
2
answersQuestion
How to derive a subclass that is a "frozen" state of another class?
Suppose |dynClass| has lots of dependent properties calculated on the fly and/or read from private properties, based on complica...
ungefär 7 år ago | 0 answers | 0
0
answersQuestion
How to test if a function handle belongs to a particular package?
I have a method that accepts a function handle and then needs to branch depending on whether that function is part of |+package1...
ungefär 7 år ago | 2 answers | 0
2
answersQuestion
Is fullfile(0,0) undocumented behavior or bug?
What is the purpose, if any, of non-char inputs to |fullfile|? >> fullfile(0) > In fullfile>refinePath (line 93) In ...
mer än 7 år ago | 1 answer | 0
1
answerCan I share a copy of a CONSTANT large array between workers of a parpool?
Answering my own question after some more googling and doc search. I am not 100% sure but I think the right answer is: no, this ...
mer än 7 år ago | 1
| accepted
Question
Can I share a copy of a CONSTANT large array between workers of a parpool?
I have an N-by-N array, |data|, of _constant_ data that needs to be accessed by each worker of a parallel pool in a |parfor| loo...
mer än 7 år ago | 2 answers | 1
2
answersQuestion
Can an object with a `Transient` property be used in a parfor loop?
In a class I am using a private property |A|, an |NxN| matrix, to store data that is expensive to compute and may be used many t...
mer än 7 år ago | 1 answer | 0
1
answerQuestion
How bad is the performance of run time introspection?
From the doc <https://www.mathworks.com/help/matlab/matlab_prog/techniques-for-improving-performance.html (Techniques for improv...
mer än 7 år ago | 1 answer | 1
1
answerQuestion
is interp1(x, v, x(k), mtd) == v(k) always true?
is interp1(x, v, x(k), mtd) == v(k) always true or does it depend on method and/or type of x and v? Followup: is the an...
mer än 7 år ago | 1 answer | 0
1
answerDoes the access method of a dependent property get called twice when the property is indexed into?
Confirmed Walter's comment. Indeed the culprit is the keyword end. Here is minimal working example. classdef Untitled ...
nästan 8 år ago | 0
| accepted
Question
Does the access method of a dependent property get called twice when the property is indexed into?
I have a class with a dependent property z. The method get.z(obj) returns a vector. This: y = myObj.z(end); appears to c...
nästan 8 år ago | 1 answer | 0
1
answerSolved
Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...
nästan 8 år ago
Question
How to make published html look as good as the blogs on MATLAB Central?
Check out any of the posts on Cleve's Corner, for example <http://blogs.mathworks.com/cleve/2016/06/09/math-and-music/ this one>...
nästan 8 år ago | 1 answer | 1
1
answerQuestion
Fastest alternative to |y = ones(size(x))| ?
The profiler red flagged this line, in a small function that is called by an inner-loop computation: ... if n == 0 ...
nästan 8 år ago | 2 answers | 0
2
answersQuestion
What test is validateattributes() using to check for attributes 'positive' or 'nonnegative' ? (possible bug)
Suppose a class MyClass with overloaded operators for comparison with numeric values. In other words, I can call obj = MyCl...
nästan 9 år ago | 1 answer | 0
1
answerQuestion
How to make user-defined type pass as numeric?
Suppose I have a defined type that behaves like a number. I would like it to pass the test: validateattributes(x, {'numeric...
nästan 9 år ago | 1 answer | 1
1
answerQuestion
Can webread(url) be used to read a file?
url = 'file:///c:/filename'; raw = webread(url); fails complaining that the file:// protocol is not supported. Can it be...
ungefär 9 år ago | 0 answers | 1
0
answersQuestion
Is it possible to disable datatips in the debugger?
It's a useful feature but unfortunately it causes my screen to flicker and change resolution. Until this bug is resolved (if eve...
mer än 9 år ago | 0 answers | 0
0
answersSubmitted
sexy
Display a symbolic expression in a human readable form. Extension of the built-in pretty function.
nästan 12 år ago | 1 download |
Question
How does "warm-up" overhead scale with data size or iteration count?
Everyone knows that when an M-file is run the first time in a Matlab session it runs much slower than the following next runs. T...
ungefär 12 år ago | 1 answer | 3
1
answerQuestion
Can MATLAB tell me which gpu device is the one connected to the display?
For example, with a GTX590, I have two gpu devices to choose from. Now my theory is that for CUDA kernel performance it might be...
mer än 12 år ago | 4 answers | 1
4
answersSolved
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...
mer än 12 år 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 ...
mer än 12 år 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...
mer än 12 år ago