Convert to 8-bit signed integer
intArray = int8(array)
Array of any numeric class, such as single or double. If array is already of class int8, the int8 function has no effect.
Array of class int8. Values range from –27 to 27 – 1.
The int8 function maps any values in array that are outside the limit to the nearest endpoint. For example,
int8(2^7) % 2^7 = 128
ans = 127
When preallocating integer arrays, specify the class in the call to functions that support a class name input (such as zeros, ones or eye), rather than calling an integer conversion function. For example,
I = int8(zeros(100)); % Creates an intermediate array
is not as efficient as
I = zeros(100, 'int8'); % Preferred