# How to fix the error

4 views (last 30 days)
Wyatt on 23 Feb 2024
Edited: Walter Roberson on 23 Feb 2024
% Set random seed value
rng(123);
% Generate random x and y arrays
x = rand(1, 250) * 10 - 5;
y = rand(1, 250) * 10 - 5;
% Plot circles
theta = linspace(0, 2*pi, 100);
bullseye_x = cos(theta);
bullseye_y = sin(theta);
middle_x = 2 * cos(theta);
middle_y = 2 * sin(theta);
outer_x = 3 * cos(theta);
outer_y = 3 * sin(theta);
figure;
plot(bullseye_x, bullseye_y, 'k-', 'LineWidth', 1.5); hold on;
plot(middle_x, middle_y, 'k-', 'LineWidth', 1.5);
plot(outer_x, outer_y, 'k-', 'LineWidth', 1.5);
% Define the function to calculate regions
function [bullseye, middleCircle, outerCircle, miss] = mytargetpractice(x, y)
% Calculate distances from the center
distances = sqrt(x.^2 + y.^2);
% Define regions using logical arrays
bullseye = distances <= 1;
middleCircle = distances > 1 & distances <= 2;
outerCircle = distances > 2 & distances <= 3;
miss = distances > 3;
end
% Calculate the number of points in each region
[bullseye, middleCircle, outerCircle, miss] = mytargetpractice(x, y);
p02a = sum(bullseye);
p02b = sum(middleCircle);
p02c = sum(outerCircle);
p02d = sum(miss);
% Plot the points in each region
plot(x(bullseye), y(bullseye), 'ro', 'MarkerEdgeColor', 'k');
plot(x(middleCircle), y(middleCircle), 'go', 'MarkerEdgeColor', 'k');
plot(x(outerCircle), y(outerCircle), 'bo', 'MarkerEdgeColor', 'k');
plot(x(miss), y(miss), 'yo', 'MarkerEdgeColor', 'k');
% Add labels, lines, title, legend, and save the figure
xlabel('X-axis');
ylabel('Y-axis');
xline(0, 'k--');
yline(0, 'k--');
legend('Bullseye', 'Middle Circle', 'Outer Circle', 'Miss', 'Location', 'best');
axis equal;
xticks(-5:1:5);
yticks(-5:1:5);
box on;
% Save the figure as .fig and .png
savefig('p02fig.fig');
print('p02fig.png', '-dpng');
Error: File: lab07.m Line: 67 Column: 1
Function definitions in a script must appear at the end of the file.
Move all statements after the "myquadrants" function definition to before the first local function definition.

Star Strider on 23 Feb 2024
The error message is clear.
Put the function at the end of the file and the code works —
% Set random seed value
rng(123);
% Generate random x and y arrays
x = rand(1, 250) * 10 - 5;
y = rand(1, 250) * 10 - 5;
% Plot circles
theta = linspace(0, 2*pi, 100);
bullseye_x = cos(theta);
bullseye_y = sin(theta);
middle_x = 2 * cos(theta);
middle_y = 2 * sin(theta);
outer_x = 3 * cos(theta);
outer_y = 3 * sin(theta);
figure;
plot(bullseye_x, bullseye_y, 'k-', 'LineWidth', 1.5); hold on;
plot(middle_x, middle_y, 'k-', 'LineWidth', 1.5);
plot(outer_x, outer_y, 'k-', 'LineWidth', 1.5);
% Calculate the number of points in each region
[bullseye, middleCircle, outerCircle, miss] = mytargetpractice(x, y);
p02a = sum(bullseye);
p02b = sum(middleCircle);
p02c = sum(outerCircle);
p02d = sum(miss);
% Plot the points in each region
plot(x(bullseye), y(bullseye), 'ro', 'MarkerEdgeColor', 'k');
plot(x(middleCircle), y(middleCircle), 'go', 'MarkerEdgeColor', 'k');
plot(x(outerCircle), y(outerCircle), 'bo', 'MarkerEdgeColor', 'k');
plot(x(miss), y(miss), 'yo', 'MarkerEdgeColor', 'k');
% Add labels, lines, title, legend, and save the figure
xlabel('X-axis');
ylabel('Y-axis');
xline(0, 'k--');
yline(0, 'k--');
legend('Bullseye', 'Middle Circle', 'Outer Circle', 'Miss', 'Location', 'best');
axis equal;
xticks(-5:1:5);
yticks(-5:1:5);
box on;
% Save the figure as .fig and .png
savefig('p02fig.fig');
print('p02fig.png', '-dpng');
% Define the function to calculate regions
function [bullseye, middleCircle, outerCircle, miss] = mytargetpractice(x, y)
% Calculate distances from the center
distances = sqrt(x.^2 + y.^2);
% Define regions using logical arrays
bullseye = distances <= 1;
middleCircle = distances > 1 & distances <= 2;
outerCircle = distances > 2 & distances <= 3;
miss = distances > 3;
end
.