Matlab的一些命令

总结一些或基本但常用，或经典的Matlab命令，逐渐更。
Matlab自带的命令更详细介绍均可以通过help命令查看。
1. 实现向量的转置:

a=[1 2 3];
b=a'

a=[1 2 3]
b=a(:)

以上两种方式均实现向量a的转置，输出的向量b均为:

b =
     1
     2
     3

2. 求包络命令：

envelope

3. 绘图
1） gcf %获取当前图形窗口的句柄（Get handle to current figure.）。
H = gcf returns the handle of the current figure. The current
figure is the window into which graphics commands like PLOT,
TITLE, SURF, etc. will draw.

gca %获取当前窗口当前坐标轴的句柄
gco %获取当前窗口当前对象的句柄

4.displays the full path for item
which item
5.获取坐标轴最值

V = axis % returns a row vector containing the scaling for the
       current plot.  If the current view is 2-D, V has four
       components; if it is 3-D, V has six components.