Kurt

Last seen: 28 dagar ago | Active since 2022

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Question

How to subtract a scatterplot object from a polyshape object
In my app I am defining polyshapes that represent satellite scan regions on Earth. I know how to subtract polyshapes from each o...

3 månader ago | 2 answers | 0

2

answers

Question

polyshape fractures after multiple merges
I am collecting satellite weather data and plotting it on a Mercator projection Earth map. I need to determine how long it takes...

4 månader ago | 1 answer | 0

1

answer

Question

How to expand lat/lon vectors into arrays for scatter plot
I am plotting a set of weather data over a Mercator projection. Most of the data arrives as 2D arrays containing lat and lon poi...

4 månader ago | 1 answer | 0

1

answer

Answered
Determining whether a point on earth (given latitude and longitude) is on land or ocean
There is an even simpler solution, similar to Amy Haskins above, that does not even require the use of geo data. I'm working wi...

5 månader ago | 0

Answered
how to do union of geopolyshape?
You can simply concatenate the lat and lon tables and create a new geoshape. However, the more complex the resulting object is, ...

6 månader ago | 0

Answered
How to prevent wraparound using geoplot
The solution I came up with was to split the patch in two along the meridian: half to the left, and half to the right. There may...

6 månader ago | 0

Question

How to prevent wraparound using geoplot
I am trying to accomplish something similar to the below post, namely prevent my data from wrapping at the meridians. So far, no...

6 månader ago | 1 answer | 0

1

answer

Answered
propagateOrbit function hangs for no obvious reason
This is an interim solution until Mathworks modifies the propagateOrbit function. This is based on the code previously mentioned...

9 månader ago | 0

Question

propagateOrbit function hangs for no obvious reason
When the propagateOrbit function is fed certain TLEs, it simply stalls instead of throwing an exception. Since the propagateOrb...

10 månader ago | 1 answer | 0

1

answer

Answered
How to propagate orbits on a non-rotating axesm globe
SOLUTION: In order to convert a TLE set to ephemeris data, you must first read a TLE file and perform several coordinate transf...

10 månader ago | 0

Question

How to propagate orbits on a non-rotating axesm globe
I used as my foundation the example found here: https://www.mathworks.com/help/map/plotting-a-3-d-dome-as-a-mesh-over-a-globe.h...

10 månader ago | 1 answer | 0

1

answer

Question

How do I align two 3D curves that are displaced in time?
I have two 3D curves (trajectories) that are nearly identical. One curve is a subset of the other, that is, its end point coordi...

11 månader ago | 0 answers | 0

0

answers

Question

How do you convert a surf object to an isosurface?
How to convert a regular surf surface (rectangular mesh) to a patch isosurface (triangular mesh)? I have seen how to go the o...

ungefär ett år ago | 1 answer | 0

1

answer

Question

Matlab function gui_mainfcn.m crashes on feval
I am trying to work with the GRIB1 file reader found at this address: https://www.mathworks.com/matlabcentral/fileexchange/5370...

mer än ett år ago | 1 answer | 0

1

answer

Question

How to incorporate axesm-based maps in an app
I am interested in creating axesm-based maps: h = axesm('MapProjection','mercator') However, there appears to be no way to tie...

mer än ett år ago | 1 answer | 0

1

answer

Answered
How to overlay a UIAxes surface on a UIFigure 3D image
It appears you can't get there from here usining geo data. I found another solution using a mesh: https://www.mathworks.com/mat...

mer än ett år ago | 0

Question

Plot 3D Dome - no topo60c file available
I am using the example of how to plot a dome as a mesh over a globe, found here: https://www.mathworks.com/help/map/plotting-a-...

mer än ett år ago | 1 answer | 0

1

answer

Question

How to overlay a UIAxes surface on a UIFigure 3D image
I have two components, a UIFigure globe and a UIAxes hemisphere created with surf(). I want to overlay the surf object on the gl...

mer än ett år ago | 1 answer | 0

1

answer

Question

Upper limit on the number of UIAxes children allowed
I am plotting orbital data, using plot3 to progressively lengthen the orbital track of a spacecraft. plot3(earthMoon.UIAxes, x...

mer än ett år ago | 2 answers | 0

2

answers

Question

How to draw 2d compass in 3d UIAxes
Is it possible to use the compass() function to draw a compass rose in a UIAxes object? I don't care about the function depicted...

mer än 2 år ago | 1 answer | 0

1

answer

Question

angle2dcm: How to reference direction cosine matrix output?
I have seen lots of discussion on how to call angle2dcm, but almost none on how to use it to transform the coordinates of an obj...

mer än 2 år ago | 1 answer | 0

1

answer

Question

App Designer: How to add components that are not listed in the library
The App Designer Component Library contains a limited number of components to drag and drop. There are many more components and ...

mer än 2 år ago | 1 answer | 0

1

answer

Answered
Matlab return C call by reference
The solution was to first load my Dynamic Link Libraries (DLLs). Then the Matlab calls to my library functions look like this:...

mer än 2 år ago | 0

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Question

Matlab return C call by reference
I am using a compiled C DLL library to compute various astronomical functions, for example time since epoch and ra/dec to az/el ...

mer än 2 år ago | 1 answer | 0

1

answer

Answered
Call parfeval using global variables?
Using a combination of spmd and spmdIndex (NOT labIndex, which is obsolete), I was able to achieve what I wanted: setting the DO...

mer än 2 år ago | 0

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Question

Call parfeval using global variables?
I am using parfeval() to do multithread logic. I have 16 cores. The documention mentions listing the calling parameters as argum...

mer än 2 år ago | 2 answers | 0

2

answers

Answered
Click on row in TextArea?
The "compose" approach reduced the formatting from about 7 minutess to 10 seconds. Thanks! I solved the TextArea size issue by ...

mer än 2 år ago | 0

| accepted

Question

Click on row in TextArea?
I have a GUI that contains a TextArea. I read in a file that is 20,000 x 16 and convert each row to a string, so the resulting t...

mer än 2 år ago | 2 answers | 0

2

answers

Question

How to draw lines in UIFigure designed in App Designer that contains an image
I have seen many examples of how to draw a line in a plot; however, I am working with an App Designer object-oriented UIFigure. ...

mer än 2 år ago | 1 answer | 0

1

answer

Question

Observation: sortrows() blows up when attempting to sort empty cells
This is more of an observation than a question, but it took me two days to figure it out. I am pre-allocating space for an arra...

mer än 2 år ago | 1 answer | 0

1

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