MATLAB Answers

Index exceeds the number of array elements (1)

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Ben Nolan
Ben Nolan on 24 Mar 2020
Answered: the cyclist on 25 Mar 2020
function [] = diggerangle(L_12, L_23, L_13, x)
iteration_limit = 20;
tolerance = 10^-7;
x = [x(1)*(pi/180);x(2)*(pi/180)];
for count = 1:iteration_limit + 1
if count == iteration_limit + 1
error('Iteration limit reached. Iteration did not converge.')
end
f = [L_12*cos(x(1))-(L_13)-L_23*cos(x(2));...
L_12*sin(x(1))-L_23*sin(x(2))];
if abs(f)<tolerance
break
end
df = [-L_12*sin(x(1))+L_23*sin(x(2));...
L_12*cos(x(1))-L_23*cos(x(2))];
x = x - inv(df)*f;
end
x(1);
x(2);
x(1)*(180/pi)
x(2)*(180/pi)
end

  2 Comments

Ameer Hamza
Ameer Hamza on 25 Mar 2020
How are you calling this function. Which line is giving this error?
Ben Nolan
Ben Nolan on 25 Mar 2020
line 6: x = [x(1)*(pi/180);x(2)*(pi/180)];
this is the problem it is giving me the error: Index exceeds the number of array elements (1)

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Answers (1)

the cyclist
the cyclist on 25 Mar 2020
You didn't answer Ameer's first question, but it seems clear that when you call the function
diggerangle(L_12, L_23, L_13, x) % what are the inputs here?
that the value of x is simply a scalar, and not a vector. Therefore,
x(2)
is going to give an error, because x only has one element.

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