plot绘图填充的方法是什么

%% 简单曲线

x = -2*pi:pi/100:2*pi;

fx = sin(x);

figure('Color','w');

%设置figure颜色为白（去掉四周灰色部分）

subplot(1,2,1);

hold on

plot(x,fx);

plot(2*x+pi/2,0.5*fx+0.1*x);

hold off

title('plot');

subplot(1,2,2);

hold on

plot_shaded(x,fx);

plot_shaded(2*x+pi/2,0.5*fx+0.1*x);

hold off

title('plot\_shaded');

%% 直方图

X1 = 3 + 2.0*randn([100000,1]);

X2 = 12 + 4.0*randn([100000,1]);

figure('Color','w');

hold on

plot_histogram_shaded(X1,'Alpha',0.3);

%参数Alpha为透明度

plot_histogram_shaded(X2);

hold off

title('plot\_histogram\_shaded');

%% 分布图

X = 1:0.25:10;

Y = sin(X)+0.25*X;

Y_error = randn(1000,numel(Y));

Y_noisy = Y+Y_error.*repmat(0.1*X,[size(Y_error,1) 1]);

figure('Color','w');

subplot(3,1,1);

plot(X,Y,'LineWidth',1.5);

title('plot (True value y=f(x))');

ylim([-1 5]);

subplot(3,1,2);

hold on

plot(X,Y,'LineWidth',1.5);

plot_distribution(X,Y_noisy);

hold off

title('plot\_distribution');

ylim([-1 5]);

subplot(3,1,3);

hold on

plot(X,Y,'LineWidth',1.5);

%参数LineWidth为线宽

plot_distribution_prctile(X,Y_noisy,'Prctile',[25 50 75 90]);

%参数Prctile为要绘制的百分位值

hold off

title('plot\_distribution\_prctile');

ylim([-1 5]);