Naor Movshovitz

University of California, Santa Cruz

Last seen: Today | Active since 2006

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Professional Interests: physical modeling; rigid-body dynamics; granular mechanics; planetary collisions

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Documentation error for polyval ouput?
The documentation for polyval describes the optional output argument delta like this: "Standard error for prediction, returned ...

meer dan 4 jaar ago | 1 answer | 0

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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...

meer dan 6 jaar ago | 2 answers | 4

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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...

bijna 7 jaar ago | 0 answers | 0

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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...

bijna 7 jaar ago | 2 answers | 0

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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 ...

ongeveer 7 jaar ago | 1 answer | 0

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Answered
Can 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 ...

ongeveer 7 jaar ago | 1

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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...

ongeveer 7 jaar ago | 2 answers | 1

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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...

ongeveer 7 jaar ago | 1 answer | 0

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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...

ongeveer 7 jaar ago | 1 answer | 1

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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...

meer dan 7 jaar ago | 1 answer | 0

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Answered
Does 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 ...

meer dan 7 jaar ago | 0

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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...

meer dan 7 jaar ago | 1 answer | 0

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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>...

meer dan 7 jaar ago | 1 answer | 1

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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 ...

meer dan 7 jaar ago | 2 answers | 0

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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...

meer dan 8 jaar ago | 1 answer | 0

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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...

meer dan 8 jaar ago | 1 answer | 1

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Question

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...

bijna 9 jaar ago | 0 answers | 1

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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...

ongeveer 9 jaar ago | 0 answers | 0

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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...

bijna 12 jaar ago | 1 answer | 3

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Question

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...

ongeveer 12 jaar ago | 4 answers | 1

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Question

How can I extract just the "real" axes from figures? Filtering out handles to annotation and legend.
Here is a scenario. You have a large number of figures open. Say each figure has a "main" axes showing some line plots, and also...

ongeveer 12 jaar ago | 1 answer | 0

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Answered
launching MATLAB from the context menu (Windows 7)
Found it. Apparently previous versions of MATLAB installers added the full path of the MATLAB runtime to HKEY_LOCAL_MACHINE...

meer dan 12 jaar ago | 0

| accepted

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launching MATLAB from the context menu (Windows 7)
For several years I have been using the following hack, in windows, for convenience. Add the key: |HKEY_CLASSES_ROOT\*\shell\...

meer dan 12 jaar ago | 1 answer | 0

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answer

Naor Movshovitz

University of California, Santa Cruz

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