Can you find any pattern in the two signals, green and blue? The blue signal is the brain wave (measured by NIRS) of a person when he is pressing some buttons (the timing of button pressing is shown i
Wavelet transform coherence (WTC) is a method for analyzing the coherence and phase lag between two time series as a function of both time and frequency (Chang and Glover 2010). Here I played with it
SVM is mostly commonly used for binary classifications. But one branch of SVM, SVM regression or SVR, is able to fit a continuous function to data. This is particularly useful when the predicted varia
Update 2021/2/27: If you find griddata3 not working, try to change griddata3 to griddata. I was asked where to get nirs2img script. Here it is. The download link is at the bottom of this article. nirs2img is to create an image file from the input data. Then theimage file can be viewed by a
Back in August, 2013 I purchased a Dell computer (OptiPlex 9010 Minitower) which has been working very well. It has Windows 7 installed. Recently I got a notification that Windows 7 will reach End of Life (i.e. Microsoft will no longer support it) so
If you decide to abandon a GMail account (not just personal GMail, GSuite included), you might want to save a record of the past emails. Or maybe you simply want to backup your emails. How to do that? Google Takeout will do the work. Go to https://ta
I started blogging in about 2008. At that time I just started to develop my first startup product, a cloud reference manager for researchers called Peaya (then PaperBox) which unfortunately (or fortunately?) failed miserably later. At that time I was
In the previous blog, we have used Stork’s big analysis to analyze the literature of fNIRS. At that time, Stork only analyzed the frequency of a single word (number indicates the number of occurences): near-infrared (1945) spectroscopy (1868) c
What’s the trend of fNIRS in brain research? Is the field growing or dying? Which country and which institute are the most productive? Who are the experts in the field and how can I contact them for collaboration? Which brain region(s) are most
Look at the two balls below. What colors are they? To me, the left ball is definitely blue, and the right one is green. If you see the same way, Haha, you (your brain) is tricked! I used photoshop to remove the background purple and yellow colors, th
Chunming Lu’s lab in Beijing Normal University has published a paper titled “Shared neural representations of syntax during online dyadic communication” in NeuroImage. This is another fNIRS hyperscanning study within a month (check
