I can't get the bit 2 in MatLab for example: 

enter code here % c is an array to save the get bit result a is decimal = 253 convert it to binary a=11111101 k=1; c(k)=bitget(a,2); c=0;

what I need is c(1)=0; 

Answers: 

You need bin2dec and bitget.

The code, you need to use is bitget(a,2) rather then getbit, and its little endian, so its looking from the right, meaning bit number 2 will return 0

Updating answer to updated question: again, you still need to be using the bitget command, and it is NOT looking at the bits from the left, it is looking at them from the right.

For example if your bits were a=11110000: 

bitget(a,1) = 0
bitget(a,2) = 0
bitget(a,3) = 0
bitget(a,4) = 0
bitget(a,5) = 1
bitget(a,6) = 1
bitget(a,7) = 1
bitget(a,8) = 1

I hope this helps