Tagged Questions
1
vote
0answers
53 views
PCA on log transformed data
I am about to conduct two Principal Component Analyses (PCA) on species abundance data and species composition data. I have about 12 different locations where abundance data for over 50 invertebrate ...
0
votes
0answers
64 views
Data transformations of scales
Could really do with some help from someone with more stats expertise than I have.
I have some data relating to a customer survey along a range of measures which are consolidated into a number of ...
5
votes
2answers
437 views
Normalization vs. scaling
What is the difference between data 'Normalization' and data 'Scaling'? Till now I thought both terms refers to same process but now I realize there is something more that I don't know/understand. ...
2
votes
3answers
1k views
Changing the scale of a variable to 0-100
I have constructed a social capital index using PCA technique. This index comprises values both positive and negative. I want to transform / convert this index to 0-100 scale to make it easy to ...
5
votes
1answer
686 views
How to calculate Rousseeuw’s and Croux’ (1993) Qn scale estimator for large samples?
Let Qn = Cqn.{|Xi-Xj|;i < j}_(k) so for a very short sample like {1,3,6,2,7,5} it can be calculated from finding the kth static order of pairwise differences:
7 6 5 3 2 1
1 6 5 4 2 1
2 5 4 3 1
...
3
votes
1answer
69 views
How can I adjust classifier to the scale of the other
I have 2 classifiers with different scales. How can I adjust one classifier to the scale of the other without loss of quality?
On the scatter plot we have 2 solutions plotted (x1, x2) against each ...
