string.double
string: X = double (str)
Convert string array to a double array.
X = char (str) returns a double array, X, which
has the same size as the input string str. All elements in
str that represent real or complex numbers are converted to
equivalent double values. Otherwise, NaN is returned.
Source Code: string
double parses numeric text back into numbers; entries that are not numbers become NaN.
s = string ({'3.14'; '42'; 'x'})
s =
3x1 string array
"3.14"
"42"
"x"
double (s)
ans =
3.1400
42.0000
NaN