Convert a Cell of Strings to a Double in Matlab

问题

How do i convert a Cell as the following:

>> A = [{'2'};{'2'};{'****'};{'23'};{'23.6'}]

A = 

    '2'
    '2'
    '****'
    '23'
    '23.6'  

To a double as the Following

A =

    2.0000
    2.0000
       NaN
   23.0000
   23.6000

回答1:

str2double can be called directly on a cell array of strings:

>> X = str2double(A)
X =
    2.0000
    2.0000
       NaN
   23.0000
   23.6000

---

On an unrelated note, the notation used to define the cell array A can be simplified a bit:

>> A = {'2'; '2'; '****'; '23'; '23.6'}
A = 
    '2'
    '2'
    '****'
    '23'
    '23.6'

no need for all those curly brackets :)

回答2:

Use the function str2double on each entry of the cell array like this:

cellfun(@str2double, A)

来源：https://stackoverflow.com/questions/24101835/convert-a-cell-of-strings-to-a-double-in-matlab