MATLAB: Normalize from -1 to 1… help me

Question

I have data like this ↓
 temp  Hum   Atmosphere Wind.......      
  -10.2  50  101000  290  7.4  0  0  0
  -11.5  47  101100  290  7  0  0  0
  -12.5  44  101200  320  6.7  0  0  0
  -13.1  43  101300  320  6.2  0  0  0
  -13.3  43  101300  320  5.6  0  0  0
  -13.5  43  101300  320  5.1  0  0  0
  -13.1  44  101300  320  5.5  1  0  0
  -12.9  44  101400  320  5.8  2  17  0.1
  -12.7  44  101400  320  6.2  2  134  2.52
  -12.9  41  101400  320  6.2  2  293  8.83
  -13.1  39  101400  320  6.2  2  434  18.02
  -13.3  37  101500  320  6.2  2  532  21.36
  -13.9  34  101400  320  6.7  2  576  13.76
  -14.5  32  101400  320  7.2  2  564  13.65
  -15.1  29  101300  320  7.7  2  495  13.37
  -14.9  31  101400  320  7.5  2  377  7.51
  -14.7  34  101400  320  7.4  2  223  4.61
  -14.5  36  101400  360  7.2  2  70  1.7
  -14.5  37  101500  360  6.7  2  4  0.29
  -14.5  39  101600  360  6.2  1  0  0
  -14.5  40  101600  320  5.7  0  0  0
  -14.5  40  101700  320  5.9  0  0  0
  -14.5  40  101700  320  6  0  0  0
  -14.5  40  101800  320  6.2  0  0  0

I wnat to normalize from -1 to 1.

I use the bsxfun, normalize, min, max …

But I can't.. Please help.

Answer 1

Let data be the column/row vector you want to normalize between -1 and 1.

clc; clear all ;
data = rand(100,1) ;  % a random data
normalized_data = -1 + 2.*(data - min(data))./(max(data) - min(data));