摘要： chapter02向量：一维数组（存数值型、字符型、逻辑型数据）a <- c(2:8)a[2:5]矩阵：二维数组A matrix is a two-dimensional array where each element has the same mode (numeric,character, or logical). Matrices are created with the matrix function. The general for-mat ismyymatrix <- matrix(vector, nrow=number_of_rows, ncol=number_of 阅读全文

摘要： 原文：http://asteriskdocs.org/en/3rd_Edition/asterisk-book-html-chunk/installing_configuring_odbc.htmlsudo apt-get install unixODBC unixODBC-devsudo apt-get install libmyodbcOn Ubuntu, the/etc/odbcinst.inifile will be blank, so you’ll need to add the data to that configuration file. Add the following t 阅读全文