Section: Type Conversion Functions
y = double(x)
where x is an n-dimensional numerical array. Conversion follows the general C rules. Note that both NaN and Inf are both preserved under type conversion.
double. First, we convert from an integer (the argument is an integer because no decimal is present):
--> double(200) ans = 200 --> quit
In the next example, a single precision argument is passed in (the presence of the f suffix implies single precision).
--> double(400.0f) ans = 400 --> quit
In the next example, a dcomplex argument is passed in. The result is the real part of the argument, and in this context, double is equivalent to the function real.
--> double(3.0+4.0*i) ans = 3 --> quit
In the next example, a string argument is passed in. The string argument is converted into an integer array corresponding to the ASCII values of each character.
--> double('helo')
ans =
104 101 108 111
-->
quit
In the last example, a cell-array is passed in. For cell-arrays and structure arrays, the result is an error.
--> double({4})
Error: Cannot convert cell-arrays to any other type.
-->
quit