Programming

Data Types Used in the Matrix

These functions test elements of a matrix for a specific data type.

Function	Description
isa	Detect if input is of a given data type.
iscell	Determine if input is a cell array.
iscellstr	Determine if input is a cell array of strings.
ischar	Determine if input is a character array.
isfloat	Determine if input is a floating-point array.
isinteger	Determine if input is an integer array.
islogical	Determine if input is a logical array.
isnumeric	Determine if input is a numeric array.
isreal	Determine if input is an array of real numbers.
isstruct	Determine if input is a MATLAB structure array.

Example Using isnumeric and isreal

Pick out the real numeric elements from this vector:

• A = [5+7i 8/7 4.23 39j pi 9-2i];
  
  for m = 1:numel(A)
     if isnumeric(A(m)) && isreal(A(m))
        disp(A(m))
     end
  end
  

The values returned are

•     1.1429
      4.2300
      3.1416
  

Getting Information About a Matrix

Data Structures Used in the Matrix

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