can we turn day numbers into text like sun and mon? you may want to convert this cell to JS and add a custom formatter on X encoding like tickFormat: weekdayScale, construct an ordinal weekdayScale() yourself with a known domain and range. align chart title, Y axis title and data transformation step: you are using mean, but you claim median (in this dataset mean and median won't differ much though)

strange choice of dot mark for something that goes continuously over time, line would be more fitting

prettigood, i would have texts in markdown cells above each chart and remove "Figure 1". as long as pictures and texts follow together you don't need to index them. scientific writing instincts, i guess