semilogy error in matlab

To create a semilog plot of an error in MATLAB, you can use the semilogy() function. Here's an example of how to use it:

main.m
% Generate sample data
x = 0:0.1:10;
y = sin(x);
% Add random noise to y
noise = randn(size(y));
y_noisy = y + noise;
% Calculate error between y and y_noisy
error = abs(y - y_noisy);

% Create semilog plot of error
semilogy(x, error);

% Add axis labels and title
xlabel('x');
ylabel('Error');
title('Semilog Plot of Error');
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This code generates a semilog plot of the error between y and y_noisy, which is calculated using the abs() function. The semilogy() function is used to create a semilogarithmic plot of the error. The x-axis is set to the values in x, and the y-axis is set to the values in error. The function is documented in detail in the MATLAB documentation.