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Jacob Halbrooks


MathWorks

101 total contributions since 2012

I am a software engineer at MathWorks, where I have worked in a variety of roles since 2004. I fell in love with MATLAB when I started using it as an undergraduate around 2000.

http://www.linkedin.com/in/jacobhalbrooks

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Answered
Is longley-rice the reason it is taking ages to generate a coverage map?
The trouble with the code is a mismatch between the antenna dimensions and the transmitter frequency. The default design frequen...

16 days ago | 2

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Answered
The RF propagation toolbox has SINR function that is used to calculate and display an SINR map, I just want the SINR values and don't want it to be displayed
When passed transmitter sites, the sinr function performs visualization only and does not support an output argument. However in...

1 month ago | 0

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Answered
Copy SiteViewrer custom terrain data from one computer to another.
There is no mechanism to copy custom terrain data that has been processed for Site Viewer from one machine to another. You will ...

3 months ago | 0

Answered
RF Propagation: Site Viewer
I can run the code you provided but do not encounter an error. The coverage map that results depends on whether the MATLAB relea...

4 months ago | 0

Answered
Coverage map for Base station signal strength
The difference in coverage maps between the example and your results in R2017b is due to the usage of terrain data that was adde...

4 months ago | 0

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Answered
How does MATLAB compute coverage of the antenna?
The default terrain data that is used to generate coverage maps is derived from the USGS GMTED2010 data set, which includes the ...

4 months ago | 0

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Plotting coverage of an LTE base station
Hi Mark, I realize it has been a while since you posted your question. However, I wanted to make you aware that the R2018b versi...

4 months ago | 0

Answered
Coverage map with custom antenna
The txsite and rxsite objects work with any antenna element or array objects from Antenna Toolbox or Phased Array System Toolbox...

4 months ago | 1

Answered
Plotting two 3D figures (mesh,surf) - set different parameters
There are lots of properties for a surface object that allow you to control transparency. You can also use ALPHA to quickly...

4 years ago | 1

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Answered
Can I call a class function from Simulink?
I'd suggest you take a look at the MATLAB System block, which is designed to support System objects in Simulink. System objects...

5 years ago | 1

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Answered
Dynamically specify namespace/package
A few pieces of documentation explain the behavior where the import list for the function does not update. From the <http://www...

5 years ago | 0

Answered
How to efficiently use dependent properties if dependence is computational costly?
I would recommend you add a method to compute and update the value of your dependent property and then call that method from the...

5 years ago | 1

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Answered
Saving current progam folder path
It looks like you want to write a string to the text file, but SAVE is not a good fit for this. The help for SAVE -ASCII explai...

5 years ago | 0

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Answered
Please help write a script to display the first line of this text file using fgetl
You just need to use FOPEN to create a file handle, and then each call to FGETL on that handle will read a line of text. Here's...

5 years ago | 0

Answered
Can't get Matlab compiler and loadlibrary to work
I suspect the correct reference page is <http://www.mathworks.com/help/compiler/matlab-library-loading.html here> (I'll report t...

5 years ago | 1

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Answered
how to download data from websites?
MATLAB supports importing data from OPenDAP sources <http://www.mathworks.com/help/matlab/import_export/importing-network-common...

5 years ago | 0

Answered
How to read Simulink inputs from Matlab ?
This error suggests that you are not using a data format that the block supports. See the Specifying the Workspace Data section...

5 years ago | 0

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Answered
Debug and workspace of functions
Each function has its own separate workspace of variables, and you do not typically get visibility of the variables outside of y...

5 years ago | 0

Answered
How can I arrange (collect) values for a couple of variables into a table outside "for loop" ?
This looks like a good use case for the <http://www.mathworks.com/help/matlab/ref/table.html TABLE> function in MATLAB. You can...

5 years ago | 0

Answered
How to use vision.X functions in simulink?
From <http://www.mathworks.com/help/dsp/gs/use-system-objects-in-simulink.html Using System objects> in Simulink: You can in...

5 years ago | 0

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Answered
how to concatanate structures of different sizes?
From the doc for <http://www.mathworks.com/help/matlab/matlab_prog/concatenate-structures.html concatenating structures>: ...

5 years ago | 0

Answered
How can I fetch values from 2 vectors of numbers without without changing their format.
You can control how MATLAB displays your data using FORMAT. This is independent of how MATLAB actually stores and handles your ...

5 years ago | 0

Answered
how do you combine character array and a row vector
You can use STRVCAT to add a row to your char matrix: >> strvcat(names, numbers) ans = ellen bobby joe...

5 years ago | 0

Answered
Help on creating structures??
You could enter your data into a two-column cell array and then use CELL2STRUCT: data = {'Krista', [10 5 1993]; ... ...

5 years ago | 0

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Answered
EngWinDemo Starts a New Instance?!
I suspect the issue is in trying to have the non-admin privileged engwindemo.exe connect to the admin privileged MATLAB process....

5 years ago | 0

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How do i use eval function when the sentence has apostrophe (') in it?
If you need EVAL, I'd suggest using SPRINTF to form your expression. This lets you see the command you are writing more natural...

5 years ago | 0

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How can I create a list of .m files currently open in the editor?
The MATLAB Editor API should handle this. Try: >> openFiles = matlab.desktop.editor.getAll; >> fileNames = {openFiles.Fil...

5 years ago | 3

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Answered
regexp to match certain words in a string
Looking at your string, I see parameter value pairs in the pattern of Param{Value}Param{Value}. If that is the case, then a reg...

5 years ago | 0

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Answered
Interface Matlab Project with C++ Project
Here are a couple more ways to consider interfacing MATLAB with C++: * Write <http://www.mathworks.com/help/matlab/matlab_ext...

5 years ago | 1

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Answered
How do I use regular expression to match the last character of a sentence?
Here's a regular expression that might be helpful, which matches if the last character in the string is "." or "!" or "?". >...

5 years ago | 1

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