How to use str2num in this problem? (problem is in description)

I have a Bit_str cell of size 1*2700. I am doing this:

vall = bit_str{1,1};
BS = str2double(vall); 
Hie = fft(BS);

the output i am getting for Hie and BS is 'Inf'. where I am doing wrong. Please tell me.

[KSSV]

What is class and size of bit_str{1,1} ??

[Roshni gupta]

bit_str is a 1D cell of size 1*2700. its value is.. 11111101000010110100000000100100000000000000.....(more values)

[Roshni gupta]

Actually the bit_str{1,1} I am having is of char type. I want to convert it in such a way that I can use fft function which can't be done in string.

[KSSV]

I think you are dealing with binary numbers.

[Roshni gupta]

yeah

Answer 1

[Andrei Bobrov]

BS = bit_str{1}-'0'
Hie = fft(BS);

[Roshni gupta]

Thank you so so much. This worked :)