octave data is plotted

>> t = [0:0.01:0.98];
>> y1 = sin(2*pi*4*t);
>> plot(t, y1);

hold on to continue to draw on the original picture

>> y2 = cos(2*pi*4*t);
>> hold on;
>> plot(t, y2, 'r'); % ‘r’ 红色

add tag

The xlabel >> ( ' Time ' )
 >> ylabel ( ' value ' ) 
>> Legend ( 'SiN', 'COS')% identification data
>> title ( 'my plot') % picture name
>> print -dpng 'myplot .png '% save images to the current directory

将数据显示在不同的图片上

>> figure(1);plot(t, y1);
>> figure(2);plot(t, y2);

分割图像subplot(a, b, c), a,b 将图像分割为a * b 的图像,c控制使用第几个图像

>> subplot(1,2,1)
>> plot(t,y1)
>> subplot(1,2,2)
>> plot(t,y2)

调整坐标轴的范围axis()

具体可以看 help axis

 

clf    清除图像

可视化矩阵

imagesc(A)

colorbar添加比对条

colormap gray 灰度化

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Origin www.cnblogs.com/19990219073x/p/11363235.html
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