how to scale the array type double of range [-1,1] to [0,1] and [0,360] to[0,1]

i want to scale my values which are in range of [0,360], [-1,1]to [0,1]

Answer 1

[Jan]

The general method to scale any input array (vector, matrix, multi-dim array) to the range [0, 1] is:

maxV = max(V(:));
minV = min(V(:));
Vs   = (V - minV) / (maxV - minV);

Answer 2

[Jan]

The following scales array x from any range to [0, 1]

 scaled = x - min(x);  
 scaled = scaled / max(scaled);

Answer 3

[Alireza Ahani]

check out this function. you can specify also the boundaries.

https://www.mathworks.com/help/matlab/ref/rescale.html

[Walter Roberson]

Correct.

This function did not exist back when the question was asked, but is a useful function to know now.

In older days, the deceptively named mat2gray() function was the one to call to do the rescaling.

Answer 4

[Azzi Abdelmalek]

a=-1:0.1:1
b=a-min(a)
e=max(a)-min(a)
out=b/e

% you can use the same code for all cases

Answer 5

[Abdullah Caliskan]

if input is matrix, you can use this. upper, bottom

xmax =max(input);
xmin =min(input);
A=bsxfun(@minus,input,xmin);
B=bsxfun(@rdivide,A,(xmax-xmin));
cikis=B*(upper-bottom)+bottom;

[Jan]

This works columnwise. I assume the min and max values should concern the complete matrix.