can someone please assist to make the square wave plot at 50Hz

Question

Gihahn 2024-4-10

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https://ww2.mathworks.cn/matlabcentral/answers/2105221-can-someone-please-assist-to-make-the-square-wave-plot-at-50hz

评论： Manikanta Aditya 2024-4-10

fs = 1000;

f = 4; %amount of square waves of graph

t = 0:1/fs:1-1/fs;

y = 3 * square(2 * pi * f * t); %generating the square wave

plot(t, y, 'LineWidth', 2)

xlabel('Time (s)')

ylabel('Amplitude')

title('Square Wave with 50 Hz Frequency and 4 Hz Period')

grid on

ylim([-5, 5]) % Set y-axis limits

the code is above . just struggling to make the square wave plot at 50Hz . I dont seem to understand where to modify the code to plot the square wave at 50Hz

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Answer 1

Manikanta Aditya 2024-4-10

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编辑：Manikanta Aditya 2024-4-10

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Hi,

To plot a square wave at 50 Hz, you need to adjust the frequency value f in your code. The frequency of the square wave is proportional to the argument of the square function, which is 2*pi*f*t in your code.

fs = 1000; % Sampling frequency

f = 50; % Frequency of the square wave (50 Hz)

t = 0:1/fs:1-1/fs; % Time vector

y = 3 * square(2 * pi * f * t); % generating the square wave

plot(t, y, 'LineWidth', 2)

xlabel('Time (s)')

ylabel('Amplitude')

title('Square Wave with 50 Hz Frequency')

grid on

ylim([-5, 5]) % Set y-axis limits

Thanks!

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Answer 2

Hassaan 2024-4-10

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https://ww2.mathworks.cn/matlabcentral/answers/2105221-can-someone-please-assist-to-make-the-square-wave-plot-at-50hz#answer_1439466

在 MATLAB Online 中打开

fs = 1000; % Sampling frequency

f = 50; % Frequency of the square wave

% Time vector from 0 to 1 second, with step size of 1/fs

t = 0:1/fs:1-1/fs;

% Generating the square wave

% square(2 * pi * f * t) generates a square wave with amplitude between -1 and 1

% Multiplying by 3 scales the wave to be between -3 and 3

y = 3 * square(2 * pi * f * t);

% Plotting the square wave

figure; % Opens a new figure window

plot(t, y, 'LineWidth', 2, 'Color', 'b'); % 'k' stands for black color

hold on; % Keeps the plot for further additions

% Adding a zero line for reference, making it easier to see the wave oscillation

plot(t, zeros(size(t)), '--', 'Color', [0.5 0.5 0.5]);

hold off; % No more additions to this plot

% Enhancing plot aesthetics

xlabel('Time (s)', 'FontSize', 12, 'FontWeight', 'bold');

ylabel('Amplitude', 'FontSize', 12, 'FontWeight', 'bold');

title('50 Hz Square Wave Plot', 'FontSize', 14, 'FontWeight', 'bold');

grid on; % Adding a grid for better readability

% Setting y-axis limits

ylim([-5, 5]);

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