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Ray Lee


Last seen: 3 years 前 |  自 2014 起处于活动状态

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提问


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 ...

4 years 前 | 1 个回答 | 0

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提问


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...

4 years 前 | 1 个回答 | 0

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提问


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, ...

5 years 前 | 0 个回答 | 0

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已回答
Lanczos algorithm for eigenvalues
The builtin function eigs is what you want.

5 years 前 | 2

提问


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?

5 years 前 | 1 个回答 | 0

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提问


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...

6 years 前 | 1 个回答 | 1

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提问


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?

6 years 前 | 0 个回答 | 0

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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...

6 years 前 | 1 个回答 | 0

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提问


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

7 years 前 | 0 个回答 | 0

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提问


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

7 years 前 | 0 个回答 | 0

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提问


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...

7 years 前 | 1 个回答 | 0

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提问


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...

7 years 前 | 0 个回答 | 0

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提问


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...

7 years 前 | 2 个回答 | 0

2

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已回答
`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); ...

7 years 前 | 1

| 已接受

提问


`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 ...

7 years 前 | 1 个回答 | 0

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已回答
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...

8 years 前 | 0

| 已接受

提问


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

8 years 前 | 2 个回答 | 0

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提问


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.

8 years 前 | 1 个回答 | 0

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提问


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...

8 years 前 | 2 个回答 | 0

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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...

8 years 前 | 2 个回答 | 1

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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...

8 years 前 | 1 个回答 | 0

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提问


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?

8 years 前 | 1 个回答 | 0

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提问


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...

8 years 前 | 0 个回答 | 0

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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...

8 years 前 | 3 个回答 | 0

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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...

8 years 前 | 0 个回答 | 0

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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...

9 years 前 | 2 个回答 | 0

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提问


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 ...

9 years 前 | 1 个回答 | 0

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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...

9 years 前 | 3 个回答 | 0

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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.

9 years 前 | 0

提问


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; ...

9 years 前 | 2 个回答 | 0

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