If you understand the definition of a mathematical function, a good way to judge it is that any line drawn parallel to the y-axis intersects with the values in the function’s curve only once. The same ...

Each .csv contains a set of data points (say, from column 4, where rows 4, 5 and 9 are individual subjects of the graph) that I want to plot with the date along the X axis. Basically, what I want to ...