Comments from my peers during the peer review

peer 1 → Overall, a good submission with only problems on plot4 (the 3rd subplot with red, blue, black, lines is not readable due to scaling problem). I believe this is because you did not resize the legend text or eliminate the border around the legend. Try passing values for the arguments cex and bty in the legend() function call. The cex arg can resize the text and the bty arg can eliminate the border around the legend. On plot3, do not use the arg [ pch = "-" ] in the legend() function call. This makes the line in the legend so tiny, it is difficult to see the color. Leave that arg out and the default will show a line next to the text. On plot2, do not pass a "main" arg to the plot argument as there is no such title in the example. Other than that, the code is straightforward and easy to follow. Très beau travail!
peer 2 → Good job! Some of the labels are in Spanish and Some of them in English. Please maintain consistency. You may also try to resize the legends of Plot 3 and same with Plot 4. - Sub metering part