CODEWITHSUNDEEP
matlabstatisticsdata-analysis
Cerberus
Cerberus

Reputation: 137

Extrapolating (converting) data based on Min and Max values

I have a column vector (not evenly spaced) of size 10000 x 1, with a range of 1 to 7. I want to set new min and max values (min = 32, max = 72) and extrapolate the vales in between so previous values (1 to 7) now are within the new range (32 to 72).

Upvotes: 0

Views: 422

Answers (2)

Smash
Smash

Reputation: 3802

A = 7*rand(10000,1);

B = (A-1)/6*(72-32)+32;

or in general:

minVal = 32;
maxVal = 72;

B = (A-min(A(:)))/(max(A(:))-min(A(:)))*(maxVal-minVal)+minVal;

Upvotes: 1

Dan Becker
Dan Becker

Reputation: 1214

Is this what you want?

old = [1 4 7];
new = (old - 1)/(7-1)*(72-32) + 32

result:

new =
    32    52    72

Seems too easy, am I missing something? The example of turning 4 into 20/3 above makes me think that I am!

Upvotes: 1

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