Ray Lee
Last seen: alrededor de 1 mes ago
38 total contributions since 2014Ray Lee's Badges
Download any 10 unique submissions
Awarded to Ray Lee on 01 Jul 2020
Accept 20 answers given by other contributors
Awarded to Ray Lee on 29 Dec 2019
Publish your first comment or rating
Awarded to Ray Lee on 09 Oct 2019
Answer 1 question that was unanswered for more than 30 days
Awarded to Ray Lee on 07 Dec 2018
Provide your first answer ever to someone else's question
Awarded to Ray Lee on 20 Jul 2017
Question
default behaviour of key press callback for matlab figure
When press a key, matlab automatically brings the command window to the front. But when I assign a customed keypressfcn to the ...
9 meses ago | 1 answer | 0
1
answerQuestion
position of axis label
When changing the axis limits, the location of the axis label string remains at the center of the axis. But if I moved the label...
9 meses ago | 1 answer | 0
1
answerQuestion
Automatic positioning of label/title of axes
After moving the string of xlabel/ylabel/title of an axes using the interactive tool, the position becomes fixed. In this case, ...
más de 1 año ago | 0 answers | 0
0
answersLanczos algorithm for eigenvalues
The builtin function eigs is what you want.
casi 2 años ago | 1
Question
What is the advantage of fliplr, flipud?
It's easy to flip along a dim using `end:-1:1`. So why design the builtin fliplr, flipud functions?
casi 2 años ago | 1 answer | 0
1
answerQuestion
Is there a way to remove or rename a variable in a big MAT file?
I want to rename/remove a variable in very large MAT file but want to avoid load all the data, modify variables and write all ne...
casi 3 años ago | 1 answer | 1
1
answerQuestion
What is "start simulink ..."
When I'm running `which` command, there is a "start simulink" message in the status bar. Why `which` is linked to simulink?
casi 3 años ago | 0 answers | 0
0
answersQuestion
Is 2d colormap supported by matlab?
Generally in matlab we use 1D gradient colormap as <<http://blogs.mathworks.com/images/steve/2014/parula_part_2_01.png>> H...
alrededor de 3 años ago | 1 answer | 0
1
answerQuestion
Warnings/Errors when quit matlab
I got warnings when exit matlab Warning: The following error was caught while executing 'internal.hotplug.EventSource' ...
más de 3 años ago | 0 answers | 0
0
answersQuestion
Is there existing function for great-circle least-square fit?
Is there existing function to fit a great circle to points on a sphere?
más de 3 años ago | 0 answers | 0
0
answersQuestion
Is it possible to rotate the markers plotted by `plot` or `scatter`?
As for plot(1:3,1:3,'linestyle','none','marker','v'); or scatter(1:3,1:3,'v','filled'); Is it able to rotat...
casi 4 años ago | 1 answer | 0
1
answerQuestion
Is there a way to add track-like boarder to the mapping axes?
As for the white-black alternative track boarder as in the following figure, how to make that in Matlab? <<http://gmt.soest.h...
casi 4 años ago | 0 answers | 0
0
answersQuestion
How to plot the brightness lines in Matlab, as this picture?
<<https://d262ilb51hltx0.cloudfront.net/max/2000/1*3QWmqtaUPYW_hdNgQCf44g.png>> Higher dense the path, higher brighness shown...
casi 4 años ago | 2 answers | 0
2
answers`distance` function doesn't work for ellipsoid
I found that it's a bug in .../toolbox/map/map/private/geodesicinv.m Two places of flat = ecc2flat(ellipsoid); ...
casi 4 años ago | 0
| accepted
Question
`distance` function doesn't work for ellipsoid
e_84 = referenceEllipsoid('wgs84'); [d_84, b_84] = distance([1,2], [30,90], e_84); throw Error using / Matrix ...
casi 4 años ago | 1 answer | 0
1
answerCan anyone explain how can this happen?
I found the doc. http://www.mathworks.com/help/matlab/matlab_prog/variable-names.html#btcg64o-1 Another potential source...
más de 4 años ago | 0
| accepted
Question
Can anyone explain how can this happen?
function myfunctest subfcn_set('notafunc'); whos which notafunc notafunc subfcn_set('sin'); whos...
más de 4 años ago | 2 answers | 0
2
answersQuestion
Will it be a good idea for MATLAB Answers provide functions enabling us follow/favorite a topic/question?
It seems there is no such utility yet.
más de 4 años ago | 1 answer | 0
1
answerQuestion
Is there any function which returns the content of a variable as string?
We have to know the data type when using `sprintf` and it can convert limited types to string. disp(var) can show the conte...
más de 4 años ago | 2 answers | 0
2
answersQuestion
Change the code when it's running
If a matlab script is running, in what situations the modifications of the code will take effects immediately for the running sc...
más de 4 años ago | 2 answers | 0
2
answersQuestion
regarding the startup options
How do I know if it's ok to run my script with '-nojvm'? And what's the difference between '-nodesktop' and '-nodispaly -nosp...
más de 4 años ago | 1 answer | 0
1
answerQuestion
What's the effect to start up Matlab with -nojvm?
I cannot use anything related to java, or only part of functions related to java?
alrededor de 5 años ago | 1 answer | 0
1
answerQuestion
Is it must necessary to apply a tapering to the signal before the bandpass filtering using filtfilt?
In the help doc of filtfilt, it says "filtfilt minimizes start-up and ending transients by matching initial conditions ..." I do...
alrededor de 5 años ago | 0 answers | 0
0
answersQuestion
Workaround for fake file in memory?
I have a mex function which reads data from a file and process it result = mex_process_data(string_path_to_file); The da...
alrededor de 5 años ago | 3 answers | 0
3
answersQuestion
In eqdazim mapping, how to plot a limited range of latitudes and longitudes with an origin off pole points?
I wanna plot a map in eqdazim (or other equal azimuth) mapping, with the origin at (50,20) and the outer frame boundary stopping...
alrededor de 5 años ago | 0 answers | 0
0
answersQuestion
How to calculate the middle point between two points on the Earth in matlab?
Given the latitudes and longitudes of two points, how to get the middle point efficiently? My trouble is there are millions o...
alrededor de 5 años ago | 2 answers | 0
2
answersQuestion
about the built-in matlab function decimate
In the matlab function 'decimate', the input signal is firstly lowpass-filtered, then downsampled. In the code, I found that ...
más de 5 años ago | 1 answer | 0
1
answerQuestion
Is it possible to call a subfunction inside a function mscript?
Is it possible to call a subfunction inside a mscript function and get the returned value? e.g., the content of 'func.m' as b...
más de 5 años ago | 3 answers | 0
3
answersenergy of a signal in t and f domain
I found the solution myself. Normalizing spectral amplitude by fs will work. But I don't know why to do this.
casi 6 años ago | 0
| accepted
Question
energy of a signal in t and f domain
The energy of a signal is expected to be the same in t and f domain. n = 1e4; dx = 0.25; x = rand(n,1) -0.5; ...
casi 6 años ago | 2 answers | 0
2
answers
Select a Web Site
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
Select web siteYou can also select a web site from the following list:
Americas
- América Latina (Español)
- Canada (English)
- United States (English)
Europe
- Belgium (English)
- Denmark (English)
- Deutschland (Deutsch)
- España (Español)
- Finland (English)
- France (Français)
- Ireland (English)
- Italia (Italiano)
- Luxembourg (English)
- Netherlands (English)
- Norway (English)
- Österreich (Deutsch)
- Portugal (English)
- Sweden (English)
- Switzerland
- United Kingdom (English)