plot a sigmoid function in matlab

To plot a sigmoid function in Matlab, we can define the function ourselves and use the plot command to display the curve. Here is an example code:

main.m
% Define a sigmoid function
sigmoid = @(x) 1./(1+exp(-x));

% Generate some x values
x = linspace(-10, 10, 100);

% Plot the sigmoid curve
plot(x, sigmoid(x))
xlabel('x')
ylabel('y')
title('Sigmoid Function')
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In the above code, we define the sigmoid function using an anonymous function @(x) 1./(1+exp(-x)). We then generate some x values using the linspace function, and plot the sigmoid curve using plot(x, sigmoid(x)).

The resulting plot should show a curve that starts out near zero, gradually rises to one as x approaches infinity, and has an inflection point at x=0.