ISA Test Type of Variable
Section: Inspection Functions
Usage
Tests the type of a variable. The syntax for its use isy = isa(x,type)
where x is the variable to test, and type is
the type. Supported built-in types are
-
'cell'for cell-arrays -
'struct'for structure-arrays -
'logical'for logical arrays -
'uint8'for unsigned 8-bit integers -
'int8'for signed 8-bit integers -
'uint16'for unsigned 16-bit integers -
'int16'for signed 16-bit integers -
'uint32'for unsigned 32-bit integers -
'int32'for signed 32-bit integers -
'uint64'for unsigned 64-bit integers -
'int64'for signed 64-bit integers -
'single'for 32-bit floating point numbers -
'double'for 64-bit floating point numbers -
'char'for string arrays
class function), then
the name of that class is returned.
Examples
Here are some examples of theisa call.
--> a = {1}
a =
[1]
--> isa(a,'char')
ans =
0
--> isa(a,'cell')
ans =
1
Here we use isa along with shortcut boolean evaluation to
safely determine if a variable contains the string 'hello'
--> a = 'hello' a = hello --> isa(a,'char') && strcmp(a,'hello') ans = 1