www.gusucode.com > signal 案例源码程序 matlab代码 > signal/ModifyMscohereDefaultPlotExample.m
%% Modify |mscohere| Default Plot % Generate two sinusoidal signals sampled for 1 second each at % 1 kHz. Each sinusoid has a frequency of 250 Hz. One of the % signals lags the other in phase by _π_/3 radians. Embed both % signals in white Gaussian noise of unit variance. Reset the random number % generator for reproducible results. rng default fs = 1000; f = 250; t = 0:1/fs:1-1/fs; um = sin(2*pi*f*t)+rand(size(t)); un = sin(2*pi*f*t-pi/3)+rand(size(t)); %% % Use |mscohere| to compute and plot the magnitude-squared coherence of the % signals. mscohere(um,un,[],[],[],fs) %% % Modify the title of the plot, the label of the _x_-axis, and the limits % of the _y_-axis. title('Magnitude-Squared Coherence') xlabel('f (Hz)') ylim([0 1.1]) %% % Use |gca| to obtain a handle to the current axes. Change the locations of % the tick marks. Remove the label of the _y_-axis. ax = gca; ax.XTick = 0:250:500; ax.YTick = 0:0.25:1; ax.YLabel.String = []; %% % Invoke the |Children| property of the handle to change the color and % width of the plotted line. ln = ax.Children; ln.Color = [0.8 0 0]; ln.LineWidth = 1.5; %% % Alternatively, use |set| and |get| to modify the line properties. set(get(gca,'Children'),'Color',[0 0.4 0],'LineStyle','--','LineWidth',1)