Matlab Arithmetic Operations

Arithmetic Operations

本文重点介绍基本数学运算__函数__, 关于__运算符__实现的基本运算见 Matlab Matrix Operations 和 Matlab Array Operations.

Modulo division

• mod 取余数
  • mod(a,m) returns the remainder after division of a by m
  • = a - m.*floor(a./m)
  • mod(a,0) returns a
• rem 取余数
  • rem(a,m) returns the remainder after division of a by m
  • = a - m.*fix(a./m)
  • rem(a,0) returns NaN
• idivide 取整数
  • idivide(a,b,<opt>) 返回按 opt 取整后的 a/b
  • opt 默认为 'fix', 可选 'fix', 'floor', 'ceil', 'round'

Rounding

• round rounds half up away from 0
• fix rounds towards 0
• floor rounds towards negative infinity
• ceil rounds towards positive infinity