Unrecognized function or variable 'x'.
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Emre Can Usengul
on 13 Apr 2020
Commented: Voss
on 6 Apr 2024 at 2:54
function y = Tsin(x,n)
x=input('Degrees: ');
y=input('Terms: ');
%Tsin calculates the sin using Taylor formula.
%Input arguments:
%x The angle in degrees, n number of terms.
z=x*pi/180;
y=0;
for k=0:n-1
y=y+(-1)^k*z^(2*k+1)/factorial(2*k+1);
end
RUN then
>> Tsin(x, n)
Unrecognized function or variable 'x'.
10 Comments
Juan David
on 6 Apr 2024 at 2:42
Moved: Voss
on 6 Apr 2024 at 2:52
% Función para calcular el valor de Lagrange
function y = lagrange2(X, Y)
n=length(X);
sym x;
for i=1:n
w=1;
for j=1:n
if j~=1
w = w * (x - X(j)) / (X(i) - X(j));
end
end
end
y = 0;
for i=1:n
y = y + w(i) * Y(i);
end
y=simplify(expand(ecuacion));
end
RUN then
Unrecognized function or variable 'x'.
Error in lagrange2 (line 10)
w = w * (x - X(j)) / (X(i) - X(j));
Accepted Answer
Adam Danz
on 13 Apr 2020
Edited: Adam Danz
on 13 Apr 2020
You need to define the input variables. You cannot simply run a function that has undefined input variables.
x = 45
n = 8
Tsin(x,n)
____________________________________
Copy of question:
function y = Tsin(x,n)
x=input('Degrees: ');
y=input('Terms: ');
%Tsin calculates the sin using Taylor formula.
%Input arguments:
%x The angle in degrees, n number of terms.
z=x*pi/180;
y=0;
for k=0:n-1
y=y+(-1)^k*z^(2*k+1)/factorial(2*k+1);
end
RUN then
>> Tsin(x, n)
Unrecognized function or variable 'x'.
2 Comments
Adam Danz
on 29 Jul 2021
@Dylan Radey I don't know what that means. All variables are defined either directly by the user or from computations within the function/script.
More Answers (1)
Yuyang Mao
on 5 Aug 2021
I got the same problem before.
Explaination: Please make sure that you have add your function to the path!
solution:
- Click run, it jumps out a window
- click 'add to path', is shows error in red color which is fine
- now give the name of your function again, in your case is 'Tsin(x,n)'
And this should work.
Best,
Yuyang
2 Comments
Adam Danz
on 9 Aug 2021
Good advice. However, in this question, the function name is Tsin but the unrecognized variable name is x.
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