【matlab】plot

plot
2-D line plot
Syntax
plot(Y)
plot(X1,Y1,...,Xn,Yn)
plot(X1,Y1,LineSpec,...,Xn,Yn,LineSpec)
plot(...,'PropertyName',PropertyValue,...)
plot(axes_handle,...)
h = plot(...)

1、设置坐标字体（A）

set(gca,'FontSize',12);

2、设置x轴标记文字（B）

xlabel('Frequency（Hz）','FontSize',14,'FontName','Times New Roman');

ylabel('Amplitude（dB）','FontSize',14,'FontName','Times New Roman');

3、设置绘图坐标显示范围

axis([400 3000 -20 70]); % 其中400 3000是x轴最小和最大值；-20和70是y周最小和最大值

4、设置绘图大小

set(gcf,'Position',[200 200 350 250]);  % 其中(200,200)是绘图左下角坐标；

% (350，250)是绘图右上角坐标。

5、在图中标注（C）

text(1800,55,’m=0.4’,'FontSize',14);       % 在400，300位置添加标注m=0.4

6、设置标题（D）

title(‘800Hz,sqrt0,1.0’);

7、设置曲线的粗细

set(findobj(get(gca,'Children'),'LineWidth',0.5),'LineWidth',1);  % 设置线条粗细

8、存储绘图

saveas(gcf,’test.emf’,'emf');   % 存储当前图像为test.emf。

9、不显示绘图

set(gcf,'visible','off');       % 不显示图片

10、标注同一绘图中不同曲线

legend('m=1.0',’m=0.8’);

e.g.

一、

t1 = (0:11)/11*pi;
y1 = sin(t1) .* sin(9*t1);
t2 = (0:100) / 100 *pi;
y2 = sin(t2) .* sin(9*t2);

subplot(2,3,1)
plot(t1,y1,'r.')

subplot(2,3,4)
plot(t2,y2,'r.')

subplot(2,3,2)
plot(t1,y1,'r')

subplot(2,3,5)
plot(t2,y2,'r')

subplot(2,3,3)
plot(t1,y1,t1,y1,'r.')


subplot(2,3,6)
plot(t1,y1,'g',t1,y1,'r.')

 二、

plot(x,y,'r',x,y, 'ks','MarkerSize',7)

三、

A = load('result.txt');

% for i = 0:0
%     start = i*4 +1
%     en = (i+1) *4
%     x = A(start:en, 1)
%     y = A(start:en, 2)
% end
figure
hold on

x = A(1:4,1);
y = A(1:4,2);
plot(x,y, '-ks','MarkerSize',7, 'LineWidth', 1)

x = A(5:8,1);
y = A(5:8,2);
plot(x,y, '-m+','MarkerSize',7, 'LineWidth', 1)

x = A(9:12,1);
y = A(9:12,2);
plot(x,y, '-bo','MarkerSize',7, 'LineWidth', 1)

x = A(13:16,1);
y = A(13:16,2);
plot(x,y, '-yx','MarkerSize',7, 'LineWidth', 1)

x = A(17:20,1);
y = A(17:20,2);
plot(x,y, '-rd','MarkerSize',7, 'LineWidth', 1)

x = A(21:24,1);
y = A(21:24,2);
plot(x,y, '-c*','MarkerSize',7, 'LineWidth', 1)

axis([0,500,0.66,0.74])
grid on
title('Warm Prediction')
xlabel('Given'),ylabel('NMAE')
legend('A','B','C','D','E','F')

set(findobj(get(gca,'Children'),'LineWidth',1),'LineWidth',2);