Check for missing argument or incorrect argument data type in call to function 'abs'.

조회 수: 4 (최근 30일)
I'm building code for getting IAE and ITAE values from a controller project.
Using a function already tested by me in other programs it returns this error message:
Check for missing argument or incorrect argument data type in call to function 'abs'.
The part of the code that is giving a problem is below:
res = sim('RTS.slx');
erroa= abs(1-res.control);
erroat = abs(dt *(1-res.control));
IAE= trapz(res.tempo, erroa);
ITAE= trapz(res.tempo, erroat);

답변 (2개)

Paul
Paul 2021년 10월 31일
I doubt that res.control is a numeric array. Depending what how the signal "control" is formed in the simulation RTS, you'll probably need to use addittional qualfiers to get to the actual data in res.control. For example, if control is a timeseries output from a To Workspace block, you'd need
erroa = abs(1 - res.control.Data)
  댓글 수: 11
Paul
Paul 2021년 10월 31일
편집: Paul 2021년 11월 1일
Hmm. Should work just fine:
res.control = timeseries(rand(84,3000),0:83);
res.control
timeseries Common Properties: Name: 'unnamed' Time: [84x1 double] TimeInfo: tsdata.timemetadata Data: [84x3000 double] DataInfo: tsdata.datametadata
erroa = abs(1 - res.control.Data);
iae = trapz(res.control.Time,erroa);
size(iae)
ans = 1×2
1 3000
Of course, res is just a regular structure here, not a Simulink.SimulationOutput object, but that shouldn't matter.
Do you see this after the which() command?
which trapz -all
/MATLAB/toolbox/matlab/datafun/trapz.m /MATLAB/toolbox/parallel/gpu/@gpuArray/trapz.m % Shadowed gpuArray method /MATLAB/toolbox/parallel/parallel/@codistributed/trapz.m % Shadowed codistributed method
Image Analyst
Image Analyst 2021년 11월 1일
Try operating on one column of data at a time
columnNumber = 15; % whatever...
erroa = 1 - res.control.Data(:, columnNumber);

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Image Analyst
Image Analyst 2021년 10월 31일
편집: Image Analyst 2021년 10월 31일
res does not have a field, property, or method called control. What does this show:
res = sim('RTS.slx') % Don't use a semicolon
fieldnames(res)
properties(res)
methods(res)
v = res.control
whos v
Dont' use semicolons. If any throw errors, just comment them out and tell us what the rest display in the command window.

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