Error using toolbox "pattern" function

Good morning to everyone,

I've got a problem when I try to use the "pattern" function provided by the satellite communications toolbox (https://es.mathworks.com/help/satcom/ref/satcom.satellitescenario.transmitter.pattern.html#d124e26691l).

When I run my script, the command window shows the following error:

Error using pattern

Conversion to pattern from satcom.satellitescenario.Transmitter is not possible.

The script is using the "pattern" built-in function (https://es.mathworks.com/help/matlab/ref/pattern.html) instead of using the toolbox function. I've tried to change the path variable to put the toolbox folder at the search top, but it didn't work .

A little help would be appreciated.

Regards.

[Steven Lord]

Can you show us the relevant lines of your script (where you're trying to call the pattern method and where you define the inputs that you use in the pattern call)? It's possible you're calling it with a different signature than the pattern method supports.

[César Borao Moratinos]

Yeah, sure. I'm trying to run the example in documentation: https://es.mathworks.com/help/satcom/ref/satcom.satellitescenario.pattern.html

startTime = datetime(2021,2,12,13,30,0);
stopTime = startTime + hours(5);
sampleTime = 60;                                      %seconds

sc = satelliteScenario(startTime,stopTime,sampleTime);
sat = satellite(sc,1e7,0,0,0,0,0);
gs = groundStation(sc,"Latitude",30,"Longitude",74);
tx = transmitter(sat,"Frequency",3e9);
rx = receiver(gs);
viewer = satelliteScenarioViewer(sc);

pat = pattern(tx);
pointAt(sat,gs);
pat.Size = 3000000;
pat.Colormap = "parula";

[Rahul]

"pattern" (Patterns to search and match text) is not a function. It is a documentation page containing various object functions related to strings and patterns. "pattern" could also be an array defined in R2020b.

Nevertheless, I did not receive any error after executing the code shared above. Please execute the following commands in the command window to pin point the issue. Please change the working directory where the above code is saved. Share the output so that I can help you in resolving the issue.

>> dir(pwd) % shows the files and folders of the current working directory
>> which pattern -all % shows all files with the name "pattern"

[César Borao Moratinos]

>> which pattern -all

pattern is a built-in method % pattern constructor

D:\MATLABT2021a\toolbox\satcom\satcom\+satcom\+satellitescenario\GaussianAntenna.p % satcom.satellitescenario.GaussianAntenna method

D:\MATLABT2021a\toolbox\matlab\strfun\pattern\@pattern\pattern.m % Shadowed pattern constructor

Answer 1

[Steven Lord]

According to the Version History section on its documentation page the pattern function in Satellite Communications Toolbox was "Introduced in R2021b". You will need to upgrade to release R2021b or later to use it.