Frage

Which MATLAB operations/functions need speeding up?
When using MATLAB, I sometimes come across a performance bottleneck caused by functionality that I believe could be much faster....

fast 13 Jahre vor | 23 Antworten | 3

23

Antworten

Beantwortet
How should I compute the eigenvectors of a sparse, real, symmetric matrix?
Just convert the matrix to a full one, and use eig. Unless less you want just a few eigenvectors, then the decomposition using t...

fast 13 Jahre vor | 0

| akzeptiert

Frage

How should I compute the eigenvectors of a sparse, real, symmetric matrix?
I need to compute all the eigenvectors of a sparse, real, symmetric matrix, A. I've tried the following: >> [V, D] = eig...

fast 13 Jahre vor | 3 Antworten | 0

3

Antworten

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Requirements for using parfor across multiple desktop PCs
You need a licensed copy of MATLAB and the Parallel Computing Toolbox on the PC running the parfor loop, and you need a licensed...

fast 13 Jahre vor | 0

| akzeptiert

Frage

Requirements for using parfor across multiple desktop PCs
I have several desktop PCs running Windows, connected over a network, all with access to a common file system. I would like to d...

fast 13 Jahre vor | 1 Antwort | 0

1

Antwort

Problem

Index one element in each vector of an array along a given dimension
Functions like min and max can return in their second output argument the index of the element in each vector along a particular...

fast 13 Jahre vor | 10 | 60 Lösungsvorschläge

Beantwortet
problem with errorbars and export_fig
Export_fig exports error bars just fine. Try: x=1:10; y=x.^2-2*rand(size(x)); err=abs(x.^2-y); errorbar(x,y,err,...

etwa 13 Jahre vor | 1

| akzeptiert

Gelöst

Animated GIF Creator
This Challenge is to execute the Function Template which has a fully functional Animated GIF creator of a shape related to a Zer...

mehr als 13 Jahre vor

Beantwortet
Placing plots into multiple page pdf document
The <http://www.mathworks.co.uk/matlabcentral/fileexchange/31215-appendpdfs append_pdfs> function can concatenate separate pdf f...

fast 14 Jahre vor | 1

Beantwortet
How to define paper orientation in export_fig for pdfs
The export_fig submission <http://www.mathworks.co.uk/matlabcentral/fileexchange/23629-exportfig description>, help text and the...

fast 14 Jahre vor | 0

Beantwortet
Best way to share code within laboratory
We use a version controlled repository, stored on a central server.

fast 14 Jahre vor | 0

Beantwortet
Mix raster / vector in ps / pdf plots
I believe <http://www.mathworks.com/matlabcentral/fileexchange/727 exportfig> (which is different from <http://www.mathworks.com...

fast 14 Jahre vor | 0

Frage

How do I change figure mode programmatically?
My figure has the rotate/zoom tool selected, and I wish to deselect it programmatically. How can I do this?

etwa 14 Jahre vor | 1 Antwort | 1

1

Antwort

Beantwortet
Create a figure -exactly- a certain size
export_fig (or rather, print) appears to only export that part of the figure which is on screen. Make the figure small and use t...

etwa 14 Jahre vor | 0

| akzeptiert

Beantwortet
Multiple “File Exchange” Animated GIF codes work for R2010a but not for R2011a
<http://www.mathworks.com/matlabcentral/fileexchange/32546-im2gif im2gif> works fine in R2012a

etwa 14 Jahre vor | 0

Beantwortet
Text size in figure on the screen vs when saving as png
Try using <http://www.mathworks.com/matlabcentral/fileexchange/23629 export_fig> as follows: export_fig -painters -r200 t...

etwa 14 Jahre vor | 0

Beantwortet
convert .fig to .jpg based on the ROI
<http://www.mathworks.com/matlabcentral/fileexchange/23629-exportfig Export_fig> automatically crops whitespace around figures b...

mehr als 14 Jahre vor | 0

| akzeptiert

Beantwortet
Clearing handle subclasses with timer objects
per isakson is right, but I'll add more info here: The anonymous function does save a reference to class object. This in itse...

mehr als 14 Jahre vor | 3

Frage

Clearing handle subclasses with timer objects
Save this class: classdef test_class < handle methods function this = test_class() fprintf('Hell...

mehr als 14 Jahre vor | 2 Antworten | 0

2

Antworten

Gelöst

Choose the best fitting dominoes
You will be given a cell array of nx2 matrices. Choose one row from each matrix. These are the ordered pairs that will be plac...

mehr als 14 Jahre vor

Gelöst

Scoring for oriented dominoes
Given a list of ordered pairs, and the order they should be placed in a line, find the sum of the absolute values of the differe...

mehr als 14 Jahre vor

Beantwortet
export_fig Warning: RGB color data not yet supported in Painter's mode
I added a paragraph in this issue to the export_fig webpage: http://sites.google.com/site/oliverwoodford/software/export_fig ...

mehr als 14 Jahre vor | 0

Beantwortet
execution of external program fails
I suggest you use the ghostcript function that comes with export_fig. It uses a full path if it needs to, but sets it automatica...

mehr als 14 Jahre vor | 0

Beantwortet
Help with exporting pcolorm with shading interp
If possible, use <http://www.mathworks.com/matlabcentral/fileexchange/11368-uimage-uimagesc uimagesc> instead of pcolorm. It wil...

mehr als 14 Jahre vor | 0

Beantwortet
How to find the linear distance between two points say (x,y) and (m,n) on an image?
p1 = [x; y]; p2 = [m; n]; d = norm(p1 - p2);

mehr als 14 Jahre vor | 3

Gelöst

Swap the input arguments
Write a two-input, two-output function that swaps its two input arguments. For example: [q,r] = swap(5,10) returns q = ...

mehr als 14 Jahre vor

Gelöst

The Goldbach Conjecture
The <http://en.wikipedia.org/wiki/Goldbach's_conjecture Goldbach conjecture> asserts that every even integer greater than 2 can ...

mehr als 14 Jahre vor

Gelöst

How to find the position of an element in a vector without using the find function
Write a function posX=findPosition(x,y) where x is a vector and y is the number that you are searching for. Examples: fin...

mehr als 14 Jahre vor

Gelöst

Project Euler: Problem 1, Multiples of 3 and 5
If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23...

mehr als 14 Jahre vor

Gelöst

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

mehr als 14 Jahre vor