extract a number within brackets from a cell of a table

I have this inside a cell of a table:

(2.59836893721600e+01dB,0.00000000000000e+00°)

and I need to extract:

2.59836893721600e+01

Thanks in advance

Answer 1

[Stephen23]

txt = '(2.59836893721600e+01dB,0.00000000000000e+00°)'

txt = '(2.59836893721600e+01dB,0.00000000000000e+00°)'

num = sscanf(txt,'(%f')

num = 
            25.98368937216