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Chad Greene


NASA Jet Propulsion Laboratory

Last seen: 13 days ago Active since 2012

I am interested in the floating ice shelves that fringe East Antarctica. My current work is toward building a better understanding of how climatology influences glaciology via oceanography. I also have some experience with the acoustics of gas hydrates and oceanic methane bubbles. Homepage: www.chadagreene.com Professional Interests: Antarctic ice shelf dynamics, sea level rise, underwater acoustics, methane hydrates Note: I will not do your homework for you and I will not respond to emails directing me to a question posed on the Answers forum.

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Question


Opening multiple instances of MATLAB causes endless folder access errors
Whenever I try to open two instances of MATLAB, I run into an endless loop of error windows. For example, if I'm running 2022b a...

17 days ago | 1 answer | 0

1

answer

Question


Text in editor window suddenly vanishes in R2022b.
I've run into lots of strange behavior using R2022a and R2022b on my MacOS Monterey 12.6.1, and until now it's been mostly just ...

18 days ago | 1 answer | 0

1

answer

Question


Missing text objects when exporting graphics in R2022b
Since upgrading to R2022b, I've repeatedly run into an inssue in which text objects, legends, titles, etc do not get printed, or...

24 days ago | 1 answer | 0

1

answer

Answered
Changing the orientation Arctic Projection maps
I typically bypass the Matlab Mapping Toolbox for stereographic projections, because the functions are kind of clunky and slow. ...

26 days ago | 0

Answered
Extract coordinates from a geopolyshape
@Sergey Kostrukov I think I found a working solution. The m_shaperead function in M_Map can handle PolygonZ and PolyLineZ data. ...

26 days ago | 0

Answered
Duplicating an entire vector
You almost got it. Try repmat(A,[1 3])

26 days ago | 0

| accepted

Question


How to read modern shapefile data
It seems increasingly common these days that data providers are saving shapefile data as PolygonZ or PolyLineZ data, rather than...

26 days ago | 1 answer | 1

1

answer

Question


Glitchy Command Window behavior in R2022a and R2022b
I've got a MacOS 12.6.1, and I've noticed since I upgraded to R2022a that the cursor in the Command Window no longer behaves pre...

1 month ago | 0 answers | 2

0

answers

Question


parpool failed to start
I'm trying to start a parallel pool in Matlab 2020b, but the pool repeatedly fails to start. Can anyone offer any guidance? Here...

3 months ago | 0 answers | 0

0

answers

Question


calling a built-in private function
I'm using stream2 for a big problem that takes about a week to run on a high-performance computer. The profiler tells me that mo...

3 months ago | 1 answer | 0

1

answer

Answered
Mapshow : attribute colors to polygons according to ID
Try this. Define a list of colors, and plot each gridcode region seperately. climate = shaperead('c1976_2000.shp'); % List...

3 months ago | 0

| accepted

Answered
Is it possible to define colormap ranges or merge colormaps?
Try concatenating colormaps, like this. Below I'm using my cmocean colormaps, which are available on File Exchange, but you can ...

3 months ago | 1

| accepted

Question


stream2 fails if coordinates are single precision?
I've encountered a strange behavior with stream2 which fails silently if any input coordinates are single precision. It looks li...

3 months ago | 0 answers | 0

0

answers

Answered
Boundary/polygon around coastline of Greenland
I've just added a 'gl' option to plot Greenland's grounding line using BedMachine's mask. https://github.com/chadagreene/BedMach...

8 months ago | 1

Question


Unfamiliar .D0 number syntax
I've inherited some Matlab code that was previously adapted from Fortran, and the Matlab code has a syntax I'm not familiar with...

9 months ago | 1 answer | 0

1

answer

Question


XData and YData from area chart
I'm using the area function to create a stacked area chart of hundreds of time series. After plotting my data via h = area(t,Y...

1 year ago | 1 answer | 0

1

answer

Answered
Can anyone help me with the a tentative guide on how to average across the two dimensions of a 3d array, and loop it across 86 timesteps?
If you have a temperature data cube T whose dimensions correspond to lat x lon x time, the simplest way to get an 86x1 array of ...

1 year ago | 1

| accepted

Answered
Better “centerpoint” than centroid of a concave polygon
I added a polycenter function to do exactly what you need in the Climate Data Toolbox for Matlab. If you have a shapefile, the...

1 year ago | 0

Answered
What should go in a next-generation MATLAB X?
If I could design Matlab from scratch I'd get rid of semicolons to suppress output, and make element-wise operations the def...

1 year ago | 0

Answered
What should go in a next-generation MATLAB X?
I'd like to define ranges using square brackets for inclusive and rounded brackets for exclusive. So insead of if x>=20 & x<30...

1 year ago | 0

Answered
How can I convert a shapefile boundaries to lat and lon?
If it's a standard map projection, use projinv.

1 year ago | 0

| accepted

Answered
How to find a figure's centroid inside a polyshape?
Also answered here, but reposting my answer in case anyone stumbles upon this thread. I just ran into this problem when trying...

1 year ago | 0

Answered
Better “centerpoint” than centroid of a concave polygon
I just ran into this problem when trying to place a text label in the middle of a crescent-shaped ice shelf. The centroid or the...

1 year ago | 1

Answered
Stereographic plot of Sea Surface Temperature Data around Antarctica.
Hi Ravi, There are a couple of ways to do this. Here's one way: Turn your vectors of latitude,longitude coordinates into 2D ...

1 year ago | 0

Answered
plot using latitude and longitude
That looks like you have scattered data. If you have an array of latitudes, an array of longitudes, and a corresponding array of...

1 year ago | 0

| accepted

Answered
polybuffer distance in meters?
I think you've got it right, Alex, but this calls for an explanation of the phrase numeric scalar. The word numeric just means a...

1 year ago | 1

| accepted

Answered
ploting 2d graph of a vector
You've pretty much got it, but you'll need to define a range of t values, and a value for the constants A, and B. You also need ...

1 year ago | 0

| accepted

Answered
Specific color corresponding to specific data using contourf colormap
Perhaps @Kelly Kearney's contourfcmap is what you need?

1 year ago | 0

Answered
Make a vector plot of the velocity field in polar coordinates
Can you use cart2pol to convert the coordinates and vector components to polar coordinates?

1 year ago | 0

Answered
Why ?? Undefined function 'crosscorr' for input arguments of type 'double'.
crosscorr is part of the econ toolbox. If you don't have that toolbox, you can probably rewrite your code to use xcorr instead. ...

1 year ago | 0

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