Why am I getting "Not enough input arguments" error

I am running my_driver which calls bugs_shape function in another .m file and this is the error I get:

>> run my_driver

Not enough input arguments.

Error in bugs_shape (line 39)
    vel(:, k) = proj(angles(k,1))*direction;

Error in my_driver (line 51)
      [posFinal, min_dist] =
      bugs_shape(options, prams, posInit,
      angles);

Error in run (line 96)
evalin('caller', [script ';']);

vel array is a 2xN array, proj is a function that takes an angle as an argument an returns a 2x2 array and direction is a 2x1 array.

[Walter Roberson]

We need to see your function declaration for bugs_shape and we need to see your function definition for proj

[David Miller]

function [posFinal, min_dist] = bugs_shape(options, prams, posInit, theta, angles)
function f = eqn(theta);
f = 1 + 0.2*cos(5*theta);
end 

function f = r1(theta);
f = (1 + 0.2*cos(5*theta))*cos(theta);
end

function f = r2(theta);
f = (1 + 0.2*cos(5*theta))*sin(theta);
end

function f = dr1(theta);
f = -1*(sin(5*theta)*cos(theta) + sin(theta)*(1+0.2*cos(5*theta)));
end

function f = dr2(theta);
f = (1+0.2*cos(5*theta))*cos(theta) - sin(5*theta)*sin(theta);
end

function f = proj(theta);
f = (1/(dr1(theta)^2+dr2(theta)^2))*...
    [dr1(theta)^2  dr1(theta)*dr2(theta); dr1(theta)*dr2(theta) dr2(theta)^2];
end
...

Answer 1

[Walter Roberson]

You missed the theta parameter when you call bugs_shape

[David Miller]

Thank you for catching my dumb mistake.