Join Mark Niemann-Ross for an in-depth discussion in this video Build a musical instrument using mouse movements, part of Code Clinic: R (2015).
- Hello, and welcome to Code Clinic. My name is Mark Niemann-Ross and I'm the content manager for the developer segment at lynda.com. Code Clinic is a course where I introduce a problem to a collection of lynda.com authors and in turn, those authors use their computer programming language of choice to produce a unique solution. You can learn several things from Code Clinic. Different approaches to solving a problem, the pros and cons of different languages, and some tips and tricks to incorporate into your own coding practices.
This time the problem is to create a musical instrument controlled by the mouse. If you move the mouse up and down, you'll change the pitch. Move it side to side to change the volume. The instrument is silent until we click and hold one of the mouse buttons. Letting go of the button turns off the musical tone. It's a simple request, but because it requires access to the mouse, it may be difficult or impossible in some languages. In all cases, we'll explore some ways to solve the problem and learn why they might not work.
Thomas Edison observed "Negative results are just what I want. "They're just as valuable to me as positive results. "I can never find the thing that does the job best "until I find the ones that don't." You may want to take some time and solve the problem yourself. In the next videos, I'll take a look at how I solved this challenge.
Mark introduces challenges and then provides an overview of his solutions in R. Challenges include topics such as statistical analysis, searching directories for images, and accessing peripheral devices.
Skill Level Intermediate
Q: R Studio tells me that it can't find files I expect to be available. Where can I find them?
A: Use the setwd() command to set the working directory to match the folder you're working in.
Q: I am unable to access the Lake Pend Oreille data from outside the U.S.
A: A static copy of this data is provided here for lynda.com members outside of the U.S.
1. Problem One: Statistical Analysis
2. Problem Two: Image Analysis
3. Problem Three: Eight Queens
4. Accessing Peripherals
5. Recursion and Directories
Walking the directory sort code10m 56s
6. Building the Web
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