[Tex/LaTex] Help me input a column vector

Question

I'm trying to input an arrow vector (a column vector, see the picture) in an align environment, but it reports an error.

Can someone show me the TeX code of it in an align environment?

Answer 1

You can use bmatrix from amsmath with \vdots:

\documentclass{article}
\usepackage{amsmath}
\begin{document}
  \begin{align}
    y &= \begin{bmatrix}
           x_{1} \\
           x_{2} \\
           \vdots \\
           x_{m}
         \end{bmatrix}
  \end{align}
\end{document}

Answering to the comment:

\documentclass{article}
\usepackage{amsmath}
\begin{document}
  \begin{align}
    y &= (x_{1},x_{2},\cdots, x_{N})
        \begin{pmatrix}
          \begin{bmatrix}
           ax_{0} + bx_{1} \\           
           \vdots \\
           ax_{n-1}+bx_{n}
          \end{bmatrix} -
          \begin{bmatrix}
           z_{1} \\
           \vdots \\
           z_{n}
         \end{bmatrix}
    \end{pmatrix}
  \end{align}
\end{document}