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
If you are interested in the full package of xjview, including nirs related scripts, please fill the following form: Name Email If you are only interested in the display function of xjview, please go to https://www.alivelearn.net/xjview/ to download.
The “Cross Wavelet and Wavelet Coherence Toolbox” download link by Grinsted et al (http://www.pol.ac.uk/home/research/waveletcoherence/) is dead. We will send you an active download link upon your request (an email with the download
Sometimes we need to work on the surface of a brain. Here I create a surface mask based on the standard avg152T1 image (MNI space) for you to download. Visualized in xjview, you can see the mask in the yellow curved lines. It’s actually a surfa
I purchased at least 2 portable hard drives and many USB drives to backup important files. For a while I did my backup every day by copying files to the portable hard drives. But then I get lazy and stopped doing this. The last time I backup was prob
This is the 6th post of the series: Handy programs to visualize NIRS data When we do an experiment, we often repeat an event (or block) for a few times. For example, in a typical finger tapping task, we ask the participants to do a finger tapping for
When I was a student in Baylor College of Medicine, I spent most of my time in front of computers analyzing data. One day I noticed that a few fellow students and postdocs, as well as our advisor, are discussing something. I moved closer and found th
When I search google or browsing blogs, I often need to click “next page” to go to the next page. This Chrome extension by Wend Li will automatically load the next page: https://chrome.google.com/webstore/detail/autopager-chrome/mmgagnmbe
I am using a Canon Scanner (CanoScan LiDE 60). It has been working fine but it stopped working today with error message: Unable to open TWAIN source Here is how to fix it: Check if you have the following folder: C:\Windows\twain_32\CNQL60 If not, go
In my previous blog (https://www.alivelearn.net/?p=1426) and in our paper titled “NIRS-based hyperscanning reveals increased interpersonal coherence in superior frontal cortex during cooperation” (full text pdf available ), we have shown
