MATLAB: How to adjust the numbers

adjusting numberssetting boundries

Hello,

Lets say I have random 64.000 numbers. Min = -36.000 and Max is = 40.000, I want to make the minimum number equals to 0 and maximum number 255 and the rest of numbers has to be adjust accordingly. Is there any way that I can do such thing ?

Thank you,

Best Answer

out = (yourarray - min1)/(max1-min1)*255

Related Solutions

MATLAB: How to find the max and min amongst a set of grouping variables

Since you didn't write if every number will occur in the first column, I allow for "missing" numbers here (it doesn't make a big difference anyway):

a=1+fix(0:.23:8)' ;
b=randi(50,length(a),1);
M=[a b]
nums=unique(M(:,1));
mmin=zeros(max(nums),1);
mmax=zeros(max(nums),1);
for cnt=1:max(nums)
  mmin(nums(cnt))=min(M(M(:,1)==nums(cnt),2));
  mmax(nums(cnt))=max(M(M(:,1)==nums(cnt),2));
end

If every number will occur, nums(cnt)==cnt, so the expressions inside the loop can be simplified a bit.

MATLAB: Find a range of minimum values in a vector/array

I see two ways:

out = sort(yourarray);
out = out(1:3);

[ii,ii] = min(conv(yourarray,[1 1 1],'same'));
out = yourarray(ii-1:ii+1);

Best Answer

Related Solutions

MATLAB: How to find the max and min amongst a set of grouping variables

MATLAB: Find a range of minimum values in a vector/array

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