Plotting yields over time
Now that the units have been dealt with, it's time to explore the datasets. An obvious question to ask about each crop is, "how do the yields change over time in each US state?" Let's draw a line plot to find out!
ggplot2 is loaded, and corn and wheat datasets are available with metric units.
यह अभ्यास पाठ्यक्रम का हिस्सा है
Introduction to Writing Functions in R
इंटरैक्टिव व्यावहारिक अभ्यास
इस अभ्यास को इस नमूना कोड को पूरा करके आज़माएँ।
# Using corn, plot yield (kg/ha) vs. year
___(___, ___(___, ___)) +
# Add a line layer, grouped by state
___(___(___ = ___)) +
# Add a smooth trend layer
___()