MATLAB: I have a coloum data, how to normalize it in Source Scanning Algorithm

ssa

how to set the column data to a range of 0-1; what is the first step,get absolute value or normalize?

The simple approach:

abs(data)/norm(data)

Are you concerned about algorithm speed?

Once you have your result:

 scaledl = scaledl.*2 - 1;

Or directly:

 result = -1 + 2.*(data - min(data))./(max(data) - min(data));