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
A recent analysis on NIH grants. On average there are 4,500 grants awarded each month. July-September is the grant season. For more detail, check out “NIH awards 4500 grants each month, peaks in summer” NIH Awards 4500 Grants per Month Up
Update: a free online tool where you can paste image directly: https://alivelearn.net/?p=2047 I get a picture and would like to copy the text in the picture. But since there are a lot of text, I do not want to type. So I wish there is a tool which ca
VMWare Player is a great free tool if you want to run multiple operating systems on one computer. For example, you may have a Mac but need to run a few programs on Windows. Instead of purchasing a new Windows computer, you can simply use VMWare Playe
Raspberry Pi for research labs (3) Raspberry Pi for research labs (2) Raspberry Pi is a mini and incredibly cheap PC. The size is like a credit card, and the price is $35. See how small it is compared to my hand. If you connect Pi with a TV (or monit
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
