MATLAB Answers

# How to interpolate based on given column

5 views (last 30 days)
Mekala balaji on 7 Nov 2018
Edited: madhan ravi on 7 Nov 2018
Hi,
I have below array(double), and want to assign 50 for maximum value and 0 for minimum value, and for the rest of the values between maxima and minima interpolation.
0.2
0.8
1.0
1.3
0.8
2.3
4.9
10.0
0.2
5
2.3
8.7
10
In this case,
0.2 -->50
10.0 -->0
for rest of the values, to interpolate between 50& 0.
##### 0 CommentsShowHide -1 older comments

Sign in to comment.

### Accepted Answer

Stephen Cobeldick on 7 Nov 2018
Edited: Stephen Cobeldick on 7 Nov 2018
No need to use interpolation, just some simple, efficient arithmetic:
>> V = [0.2;0.8;1.0;1.3;0.8;2.3;4.9;10.0;0.2;5;2.3;8.7;10]
V =
0.20000
0.80000
1.00000
1.30000
0.80000
2.30000
4.90000
10.00000
0.20000
5.00000
2.30000
8.70000
10.00000
>> Vmin = min(V);
>> Vmax = max(V);
>> 50*(Vmax-V)/(Vmax-Vmin)
ans =
50.00000
46.93878
45.91837
44.38776
46.93878
39.28571
26.02041
0.00000
50.00000
25.51020
39.28571
6.63265
0.00000
##### 0 CommentsShowHide -1 older comments

Sign in to comment.

### More Answers (1)

madhan ravi on 7 Nov 2018
Edited: madhan ravi on 7 Nov 2018
a=[0.2
0.8
1.0
1.3
0.8
2.3
4.9
10.0
0.2
5
2.3
8.7
10]
[~,x1]= max(a)
[~,x2]=min(a)
a(x1)=50
a(x2)=0
Interpolated_values=interp1(a,linspace(a(1),a(end))); %interpolated between 0 and 50
##### 0 CommentsShowHide -1 older comments

Sign in to comment.

R2016a

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!