Dimensionality reduction techniques for clustering.
I think LDA is used for both supervised and unsupervised problems.
LDA is matrix based dimensionality reduction technique.
LDA can only be used in supervised settings. It maximizes the inter-class distance while minimizing the intra-class spread.
PCA is a linear method that is useful for unsupervised dimensionality reduction.
In the classification model of decision trees, we need to choose the spiting attribute. In this process normally we used to choose the highest values of GINI index as spiting attribute, but in...
07 August 2014 4,448 2 View
06 July 2014 9,583 1 View
06 July 2014 351 20 View
In the picture (for example of a hand) I want to identify the color labels. How would I write a matlab code for this?
06 July 2014 9,328 8 View
In the k-means algorithm we use convergence rate and improvement of convergence rate. what are the exact meanings of these convergence rates?
04 May 2014 6,874 1 View
Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...
03 March 2021 8,796 3 View
What Characteristics makes CNN work better?
03 March 2021 1,458 4 View
i would to know some of the research gaps in the artificial intelligence field in most african countries.
03 March 2021 6,145 3 View
I have selected brain tumor images ...but now found that already lots of research done n this topic.
03 March 2021 5,774 3 View
What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...
03 March 2021 1,401 3 View
i am try to classify the x-ray images. During classification , can i block unwanted images (except x-ray image).
03 March 2021 7,100 1 View
dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...
03 March 2021 6,994 5 View
1. What is the impact of having different scales in a survey? and how can we solve this problem before and after data collection (Literature-based reflection)? Thank you for your time and for...
03 March 2021 2,870 3 View
I'm dealing with a mediation model and am using the PROCESS module in SPSS. Due to SPSS and PROCESS being limited in the imputation methods - being unable to handle multiple imputation - the other...
02 March 2021 4,362 1 View
The range of forms and sizes of cavities in rock is very big. Is there a classification scheme for rock cavities regarding their size and shape?
02 March 2021 4,511 3 View