Matlab绘制3-D图形的几个例子，很详细，也很全面的介绍了绘制3-D图形的函数，其中最后一个是画直方图的，横向和纵向都有例子。-Matlab 3-D graphics to draw a few examples of very detailed and very comprehensive introduction to drawing 3-D graphics functions, the last one is the histogram drawing, horizontal and