simple program in matlab for making zoom to an image

plot图像编辑程序，绘制plot图之后，常需要进行局部放大的操作，magnify文件大显身手的时候就到了，具体操作不做赘述，请见百度(Plot image editing program, drawing plot diagram, often need to do some local zoom operation, magnify files to show their talents when, the specific operations do not go into details