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Ray Lee


Last seen: plus de 4 ans il y a |  Actif depuis 2014

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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 ...

environ 5 ans il y a | 1 réponse | 0

1

réponse

Question


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...

environ 5 ans il y a | 1 réponse | 0

1

réponse

Question


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, ...

plus de 5 ans il y a | 1 réponse | 0

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réponse

Réponse apportée
Lanczos algorithm for eigenvalues
The builtin function eigs is what you want.

environ 6 ans il y a | 2

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?

environ 6 ans il y a | 1 réponse | 0

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réponse

Question


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...

environ 7 ans il y a | 1 réponse | 1

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réponse

Question


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?

environ 7 ans il y a | 1 réponse | 0

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Question


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...

plus de 7 ans il y a | 1 réponse | 0

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Question


Warnings/Errors when quit matlab
I got warnings when exit matlab Warning: The following error was caught while executing 'internal.hotplug.EventSource' ...

presque 8 ans il y a | 1 réponse | 0

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Question


Is there existing function for great-circle least-square fit?
Is there existing function to fit a great circle to points on a sphere?

environ 8 ans il y a | 1 réponse | 0

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Question


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...

environ 8 ans il y a | 1 réponse | 0

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Question


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...

plus de 8 ans il y a | 1 réponse | 0

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Question


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...

plus de 8 ans il y a | 2 réponses | 0

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Réponse apportée
`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); ...

plus de 8 ans il y a | 1

| A accepté

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 ...

plus de 8 ans il y a | 1 réponse | 0

1

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Réponse apportée
Can 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...

presque 9 ans il y a | 0

| A accepté

Question


Can anyone explain how can this happen?
function myfunctest subfcn_set('notafunc'); whos which notafunc notafunc subfcn_set('sin'); whos...

presque 9 ans il y a | 2 réponses | 0

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réponses

Question


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.

presque 9 ans il y a | 1 réponse | 0

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Question


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...

presque 9 ans il y a | 2 réponses | 0

2

réponses

Question


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...

presque 9 ans il y a | 2 réponses | 1

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réponses

Question


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...

presque 9 ans il y a | 1 réponse | 0

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Question


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?

plus de 9 ans il y a | 1 réponse | 0

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Question


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...

plus de 9 ans il y a | 1 réponse | 0

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Question


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...

plus de 9 ans il y a | 3 réponses | 0

3

réponses

Question


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...

plus de 9 ans il y a | 1 réponse | 0

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réponse

Question


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...

plus de 9 ans il y a | 2 réponses | 0

2

réponses

Question


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 ...

presque 10 ans il y a | 1 réponse | 0

1

réponse

Question


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...

environ 10 ans il y a | 3 réponses | 0

3

réponses

Réponse apportée
energy 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.

environ 10 ans il y a | 0

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; ...

environ 10 ans il y a | 3 réponses | 0

3

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