matlab中class和whos作用

matlab frequently-used function

class

功能

• 返回給定對象的類型Return class name of object.類似於python中的type函數

語法Syntax

• S = class(OBJ) %returns the name of the class of object OBJ.

• Possibilities are:

  double	–Double precision floating point number matrix or array
  single	–Single precision floating point number array
  logical	– Logical array
  char	– Character array
  cell	– Cell array
  struct	– Structure array
  function_handle	– Function Handle
  int8	– 8-bit signed integer array
  uint8	– 8-bit unsigned integer array
  int16	– 16-bit signed integer array
  uint16	– 16-bit unsigned integer array
  int32	– 32-bit signed integer array
  uint32	– 32-bit unsigned integer array
  int64	– 64-bit signed integer array
  uint64	– 64-bit unsigned integer array
  class_name	– MATLAB class name for MATLAB objects
  java_class	– Java class name for java objects

• Example 1: Obtain the name of the class of value PI

  • name = class(PI);

• similar function
  See also isa, superiorto, inferiorto, classdef, struct.

其他

• 更多細節通過doc class查看API

whos

功能

• List variables in workspace, with sizes and types；比class更加詳細

語法

• whos:返回當前活動工作空間的所有變量的信息
• whos(variables):返回指定命名的變量信息
• whos(location):返回指定位置的變量信息
• whos(variables,location)
• S = whos(_):stores information about the variables in structure array, S, using no input arguments, or any of the input arguments from the previous syntaxes.將這些信息複製給結構體變量存儲。

其他

• 更多細節通過doc whos查看API

以上兩個函數主要用於matlab程序的調試