convert char to double

var = '0' (this is char)

and i want this value convert 'double'

so i used

out = str2double(regexp(var,'\d*','match')

But I have a parse error

How can I get the val value in double?

For reference, if str2double is used, the NAN value is obtained.

[Stephen23]

var = '0'; %                              v   missing parenthesis
out = str2double(regexp(var,'\d*','match'))

out = 0

out = str2double(var)

out = 0

Answer 1

[Davide Masiello]

var = '0';
out = str2double(var)

out = 0

whos out

  Name      Size            Bytes  Class     Attributes

  out       1x1                 8  double              

No need to use regular expressions at all, at least in Matlab.

[lovedive0142]

If I do this, I get a nan value, not a zero. I don't think it's properly converted to double .....

[Davide Masiello]

What you see in my answer is obtained running Matlab R2022b.

What version do you use?

[lovedive0142]

i'm using Matlab R2022b too..

Actually, I'm getting this data from another place, but isn't the char value correct if it pops up like this?......