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Home/Matlab/accessIntervals Function: Subscripting into a Table Using One Subscript Error

accessIntervals Function: Subscripting into a Table Using One Subscript Error

/ 2025-01-08
accessIntervals Function: Subscripting into a Table Using One Subscript Error
Matlab

Problem Description:
I am working on a MATLAB project involving the Satellite Communications Toolbox. My script uses the accessIntervals function to compute access intervals for satellites and ground stations. However, I consistently encounter the following error:
sql
Copy code
Subscripting into a table using one subscript (as in t(i)) is not supported. Specify a row subscript and a variable subscript, as in t(rows,vars). To select variables, use t(:,i) or for one variable t.(i). To select rows, use t(i,:).

Steps to Reproduce:
I created a satellite scenario with the following setup:matlabCopy codestartTime = datetime(2024, 1, 6, 23, 23, 0);
stopTime = startTime + hours(24);
sampleTime = 60;
sc = satelliteScenario(startTime, stopTime, sampleTime);
sat = walkerDelta(sc, 570e3 + 6378.14e3, 70, 720, 36, 1, ArgumentOfLatitude=15, Name="Starlink");
gs = groundStation(sc, "Name", "Test Station", "Latitude", -35.40139, "Longitude", 148.98167);
ac = access(sat, gs);

I attempted to call accessIntervals for the Access object:matlabCopy codeTest = accessIntervals(ac(1));

The error occurs for all Access objects (ac).
Debugging Steps Taken:
I confirmed the Access objects (ac) are valid and properly initialized:matlabCopy codeAccess Object 1:
Access with properties:
Sequence: [1 721]
LineWidth: 3
LineColor: [0.3922 0.8314 0.0745]

The error persists for all Access objects.
Questions:
Is this a known issue with accessIntervals or the Satellite Communications Toolbox?
How can I resolve or work around this error to compute access intervals?
Are there alternative methods to compute satellite-ground station access intervals if accessIntervals cannot be used?
Environment: MatlabonlineProblem Description:
I am working on a MATLAB project involving the Satellite Communications Toolbox. My script uses the accessIntervals function to compute access intervals for satellites and ground stations. However, I consistently encounter the following error:
sql
Copy code
Subscripting into a table using one subscript (as in t(i)) is not supported. Specify a row subscript and a variable subscript, as in t(rows,vars). To select variables, use t(:,i) or for one variable t.(i). To select rows, use t(i,:).

Steps to Reproduce:
I created a satellite scenario with the following setup:matlabCopy codestartTime = datetime(2024, 1, 6, 23, 23, 0);
stopTime = startTime + hours(24);
sampleTime = 60;
sc = satelliteScenario(startTime, stopTime, sampleTime);
sat = walkerDelta(sc, 570e3 + 6378.14e3, 70, 720, 36, 1, ArgumentOfLatitude=15, Name="Starlink");
gs = groundStation(sc, "Name", "Test Station", "Latitude", -35.40139, "Longitude", 148.98167);
ac = access(sat, gs);

I attempted to call accessIntervals for the Access object:matlabCopy codeTest = accessIntervals(ac(1));

The error occurs for all Access objects (ac).
Debugging Steps Taken:
I confirmed the Access objects (ac) are valid and properly initialized:matlabCopy codeAccess Object 1:
Access with properties:
Sequence: [1 721]
LineWidth: 3
LineColor: [0.3922 0.8314 0.0745]

The error persists for all Access objects.
Questions:
Is this a known issue with accessIntervals or the Satellite Communications Toolbox?
How can I resolve or work around this error to compute access intervals?
Are there alternative methods to compute satellite-ground station access intervals if accessIntervals cannot be used?
Environment: Matlabonline Problem Description:
I am working on a MATLAB project involving the Satellite Communications Toolbox. My script uses the accessIntervals function to compute access intervals for satellites and ground stations. However, I consistently encounter the following error:
sql
Copy code
Subscripting into a table using one subscript (as in t(i)) is not supported. Specify a row subscript and a variable subscript, as in t(rows,vars). To select variables, use t(:,i) or for one variable t.(i). To select rows, use t(i,:).

Steps to Reproduce:
I created a satellite scenario with the following setup:matlabCopy codestartTime = datetime(2024, 1, 6, 23, 23, 0);
stopTime = startTime + hours(24);
sampleTime = 60;
sc = satelliteScenario(startTime, stopTime, sampleTime);
sat = walkerDelta(sc, 570e3 + 6378.14e3, 70, 720, 36, 1, ArgumentOfLatitude=15, Name="Starlink");
gs = groundStation(sc, "Name", "Test Station", "Latitude", -35.40139, "Longitude", 148.98167);
ac = access(sat, gs);

I attempted to call accessIntervals for the Access object:matlabCopy codeTest = accessIntervals(ac(1));

The error occurs for all Access objects (ac).
Debugging Steps Taken:
I confirmed the Access objects (ac) are valid and properly initialized:matlabCopy codeAccess Object 1:
Access with properties:
Sequence: [1 721]
LineWidth: 3
LineColor: [0.3922 0.8314 0.0745]

The error persists for all Access objects.
Questions:
Is this a known issue with accessIntervals or the Satellite Communications Toolbox?
How can I resolve or work around this error to compute access intervals?
Are there alternative methods to compute satellite-ground station access intervals if accessIntervals cannot be used?
Environment: Matlabonline accessintervals satellite toolbox satellite scenar, table indexing, error handling MATLAB Answers — New Questions

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Tags: matlab

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