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14.4 Conclusion

Getting the data just right to analyze can be a time-consuming part of our work flow, although it is often inescapable. In this chapter we examined combining multiple datasets into one and changing the orientation from column based (wide) to row based (long). We used plyr, reshape2 and data.table along with base functions to accomplish this. This chapter combined with Chapter 11 covers most of the basics of data munging with an eye to both convenience and speed.

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