Error using subs function of Symbolic Math toolbox
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I am using the following code to generate data to use in Non linear Least Square Estimation
syms a b S
f=@(a,b,S) a+a*b + b*S;
Data =[ ];
for i = 1:10
Data =[Data ; [i, subs(f, [a,b,S], [1,2,i])] ];
end
When I run these I get the following error.
Expected input number 1, S, to be one of
these types:
sym
Instead its type was function_handle.
Error in sym/subs (line 60)
validateattributes(F, {'sym'}, {}, 'subs','S', 1);
I don't understand which at which part I'm making mistake. I even tried by converting sym before using subs but this sill doesn't seem to work.
My MATLAB version is 2019b
1 个评论
Torsten
2021-12-29
Use f = a+a*b+b*S instead of f=@(a,b,S) a+a*b+b*S.
采纳的回答
Use Torsten's suggestion, or
syms a b S
f(a,b,S) = a+a*b + b*S;
Data =[ ];
for i = 1:10
Data =[Data ; [i, f(1,2,i)] ];
end
Data
Or more simply
Data = [1:10; f(1,2,1:10)].'
Is it certain that sym objects and math is needed here at all?
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