Wednesday, September 29, 2010

How to install a toolbox in MATLAB

Today I learned how to install a toolbox in MATLAB. i know it's easy and simple for those who are experienced. But for me, it still took me a while to figure it out.

I downloaded a midi toolbox as a .zip file. Then I extracted it to one folder. The manual told me I need to "define the path varialbe", but how? Finally I knew it: File -> Set folder. One the pop-up dialogue box, use Add folder to add the path for the toolbox. Done!

Use Audacity to change size of MP3 files

Today I used Audacity to edit some MP3 files so that they can be used as my cell phone ringtones. I opened the MP3 files in Audacity, cut out the fragment I liked, and exported them as MP3 files. After I send them to my cellphone via bluetooth, I found that the files are too large to be set as ringtones.

I checked online and on the Audacity forum I found that people are talking about export 'options', but in this case, the 'option' dialogue box didn't show up at all. I guess it is because what I imported is already a MP3 file and the bitrate has been set. Then I tried several different setting at different places. Finally I figured out that the right thing to set is the 'project rate'. Decreasing this project rate results in much smaller MP3 file.

 

Saturday, September 25, 2010

Contam is also fun!

Today I happened to find out that NIST has developed some software and they are free. So I downloaded one of them, Contam 2.4, followed the tutorials and finished my first ever Contam project. It's fun, though I am not sure how accurate the results could be.

Here's the link for the software:
http://www.bfrl.nist.gov/IAQanalysis/index.htm

And this is my results:

my-alpine and docker-compose.yml

 ``` version: '1' services:     man:       build: .       image: my-alpine:latest   ```  Dockerfile: ``` FROM alpine:latest ENV PYTH...