correlated

how to generate a dataset of correlated variables with different distributions?

由 ╄→гoц情女王★ 提交于 2019-12-24 04:12:38
问题 For teaching purposes, I need to generate random datasets of correlated random variables with different distributions. I have tried corr2data in Stata but it will not allow me to specify max and min values of the variables to be generated, just means, sd's and the covariance matrix. Therefore, I need to do messy adjustments after generation of the data. Various other details annoy me with corr2data . Is there a simpler way of doing this with MATLAB? I am not as familiar with this software as

How to implement ZCA Whitening? Python

由 你。 提交于 2019-12-17 12:32:53
问题 Im trying to implement ZCA whitening and found some articles to do it, but they are a bit confusing.. can someone shine a light for me? Any tip or help is appreciated! Here is the articles i read : http://courses.media.mit.edu/2010fall/mas622j/whiten.pdf http://bbabenko.tumblr.com/post/86756017649/learning-low-level-vision-feautres-in-10-lines-of I tried several things but most of them i didnt understand and i got locked at some step. Right now i have this as base to start again : dtype = np

How to implement ZCA Whitening? Python

由 微笑、不失礼 提交于 2019-12-17 12:32:11
问题 Im trying to implement ZCA whitening and found some articles to do it, but they are a bit confusing.. can someone shine a light for me? Any tip or help is appreciated! Here is the articles i read : http://courses.media.mit.edu/2010fall/mas622j/whiten.pdf http://bbabenko.tumblr.com/post/86756017649/learning-low-level-vision-feautres-in-10-lines-of I tried several things but most of them i didnt understand and i got locked at some step. Right now i have this as base to start again : dtype = np

How to implement ZCA Whitening? Python

由 天大地大妈咪最大 提交于 2019-11-27 23:09:15
Im trying to implement ZCA whitening and found some articles to do it, but they are a bit confusing.. can someone shine a light for me? Any tip or help is appreciated! Here is the articles i read : http://courses.media.mit.edu/2010fall/mas622j/whiten.pdf http://bbabenko.tumblr.com/post/86756017649/learning-low-level-vision-feautres-in-10-lines-of I tried several things but most of them i didnt understand and i got locked at some step. Right now i have this as base to start again : dtype = np.float32 data = np.loadtxt("../inputData/train.csv", dtype=dtype, delimiter=',', skiprows=1) img = (
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