EXPLAINED: Unrecognized Function or Variable in MATLAB

Here's a quick video explaining the super common error 'unrecognized function or variable' in MATLAB. Most MATLAB users understand variable definitions in the workspace, but it's also easy to overwrite built in functions and get lost in more complex chunks of code.
For more explanations, tips, tricks, and MATLAB-related goodness, consider subscribing or check out the blog:
matlabminute.com/