plot range -pi to pi

Question

Abu Yamen 2016-12-2

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/315149-plot-range-pi-to-pi

评论： Abu Yamen 2016-12-3

采纳的回答： Image Analyst

how we can plot sine, cosine and tangent on one Figure window ,my problem was the range --> -π < θ < π.

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Roger Stafford 2016-12-2

You can't do it! Over that range the tangent function becomes infinite-valued, so there is no way it could ever be completely plotted. You had better make some provision for avoiding such infinite or extremely large numbers in your plot.

Abu Yamen 2016-12-3

when i select the rang the plot does not give cos or sin

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Answer 1

Image Analyst 2016-12-2

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/315149-plot-range-pi-to-pi#answer_245754

在 MATLAB Online 中打开

image.png

Try this:

% Initialization / clean-up code.
clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
clear;  % Erase all existing variables. Or clearvars if you want.
workspace;  % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 20;
theta = linspace(-pi, pi, 1000);
period = 3*pi/4;  % Whatever you want.
sint = sin(2 * pi * theta / period);
plot(theta, sint, 'b-', 'LineWidth', 2);
hold on;
cosinet = cos(2 * pi * theta / period);
plot(theta, cosinet, 'r-', 'LineWidth', 2);
tant = tan(2 * pi * theta / period);
plot(theta, tant, '-', 'Color', [0, 0.5, 0], 'LineWidth', 2);
grid on;
xlabel('Theta [in radians]', 'FontSize', fontSize);
ylabel('Amplitude (signal value)', 'FontSize', fontSize);
title('Trig functions versus Theta', 'FontSize', fontSize);
legend('Sine', 'Cosine', 'Tangent');
% The tangent spikes are so big that we can't see the sin and cosine.
% Let's limit the y range to +/- 4;
ylim([-4, 4]);
% Set up figure properties:
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);
% Get rid of tool bar and pulldown menus that are along top of figure.
set(gcf, 'Toolbar', 'none', 'Menu', 'none');
% Give a name to the title bar.
set(gcf, 'Name', 'Demo by ImageAnalyst', 'NumberTitle', 'Off')