The way this is organized isn't great for visualization. We read left to right, but since days are laid out vertically this means that horizontally adjacent cells are actually a month apart. A standard calendar interface would be more appropriate for seeing how your mood changed day-to-day (and be less confusing to interact with).
Also noticing that the line graph is deceptive; it only interpolates one point for each month, by averaging the entire month together. That's more of a bar graph.
The way this is organized isn't great for visualization. We read left to right, but since days are laid out vertically this means that horizontally adjacent cells are actually a month apart. A standard calendar interface would be more appropriate for seeing how your mood changed day-to-day (and be less confusing to interact with).
Also noticing that the line graph is deceptive; it only interpolates one point for each month, by averaging the entire month together. That's more of a bar graph.