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
I have a PDF file which contains many pages. For some reason I need to send only page 3 and 5 to a friend. How can I create a PDF which contains only page 3 and 5? It turns out using Google Chrome is very easy (and free)! I simply open the big PDF in
We know the hemodynamic signal measured by fMRI (or NIRS) is delayed respective to the onset of stimuli. But how long is the delay? Many people think it takes about 2s for the signal to arise. Actually the delay varies from region to region. As shown
I had been using a Lenovo Edge laptop, and one day it died. The operation system (windows 7) was corrupted. After installing a new Windows 7, I found the computer is impossible to use – it does not find the wireless adapter and the screen resol
Two Ways to Apply a Formula to an Entire Column in Excel This small trick can be handy if you have a lot of rows. The most commonly used method – dragging down – will be too time consuming in this case.
Description: The subject is myself. I did a simple finger tapping task. I continuously tapped my right hand on the table for 10s, then rest for 20s. Then repeat this tapping-rest cycle for 20 times. NIRS signals were recorded by Hitachi ETG-4000. The
In one column of your excel your date is formatted as “03/06/2001”. How do you format it to “2001 Mar 6”? See: Reference: http://office.microsoft.com/en-us/excel-help/format-a-date-the-way-you-want-HA102809474.aspx
Assume you have two columns in an Excel sheet. Column A contains some names, Column B also contains some names, some of which are duplicates from A. You want to know which ones are unique, and you want to create a column C where only unique names are
We have an interesting challenge in one of our projects. In our neuroimaging experiment, we need the participant to play a computer game while his brain is scanned (using a NIRS device ETG 4000 in this case). As you can imagine, we need to start the
