MATLAB Programming

Creating and Concatenating Matrices
Combining Unlike Integer Types
If you combine different integer types in a matrix (e.g., signed with unsigned,
or 8-bit integers with 16-bit integers), MATLAB returns a matrix in which all
elements are of one common type. MATLAB sets all elements of the resulting
matrix to the data type of the left-most element in the input matrix. For
example, the result of the following concatenation is a vector of three 16-bit
signed integers:
A = [int16(450) uint8(250) int32(1000000)]
MATLAB also displays a warning to inform you that the result may not be
what you had expected:
A = [int16(450) uint8(250) int32(1000000)];
Warning: Concatenation with dominant (left-most) integer class
may overflow other operands on conversion to return class.
You can disable this warning by entering the following two commands directly
after the operation that caused the warning. The first command retrieves
the message identifier associated with the most recent warning issued by
MATLAB. The second command uses this identifier to disable any further
warnings of that type from being issued:
[msg, intcat_msgid] = lastwarn;
warning('off', intcat_msgid);
To reenable the warning so that it will now be displayed, use
warning('on', intcat_msgid);
You can use these commands to disable or enable the display of any MATLAB
warning.
Example of Combining Unlike Integer Sizes. After disabling the integer
concatenation warnings as shown above, concatenate the following two
numbers once, and then switch their order. The return value depends on the
order in which the integers are concatenated. The left-most type determines
thedatatypeforallelementsinthevector:
A = [int16(5000) int8(50)]
A =
1-13