What's wrong with the folow function?

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Mariana
Mariana 2013-12-4
回答： Walter Roberson 2013-12-4
f is my input function and I have to verify if it converges. It appears: "Error using inline/feval (line 23)Not enough inputs to inline function."
df = diff(f);
f2 = diff(df);
f1 = inline(char(f));
df1 = inline(char(df));
df2 = inline(char(f2));
c=1;
if (feval(f1,a)*feval(f1,b)>=0)
disp('No')
c=0;
return
else
if (feval(df1,a)*feval(df1,b)<=0)
disp(' No')
c=0;
return
end
end
What could it be?

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回答（1 个）

Walter Roberson
Walter Roberson 2013-12-4
You have not shown us how you constructed f. You have not used it in the manner I showed in http://www.mathworks.co.uk/matlabcentral/answers/108360-what-s-wrong-with-the-folow-expression
Please show f, and please show class(f) and symvar(f)

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