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Good Graph!

This article from Uni Plant Physiology Spring 2005 explains why and how to create graphs, whether scatter plots or bar graphs, to summarize and compare data, show changes over time, and tell a story using visual representation. The article also provides helpful tips and answers FAQs.

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Good Graph!

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  1. Good Graph! UNI Plant Physiology Spring 2005

  2. Why make graphs? • To summarize your data • To contrast treatments • To show what happens over time (conc., distance, etc.) • To tell a story rather than give numbers • Because you have to

  3. Two main kinds • Scatter plot (dots) • Bar graph

  4. Scatter graph: Start with the box

  5. Independent axis: What?

  6. X axis units

  7. X axis tick labels

  8. Dependent axis: What?

  9. Y axis units

  10. Y axis tick labels

  11. Title: What’s it about?

  12. Add the data at last

  13. Connect the dots

  14. Good Scatter Plot

  15. Scatter or bar graph? • Continuous variable (x) • Examples: temperature, size, weight • Scatter • Connect the lines • Discontinuous variable (x) • Examples: pet type, number of feet, car model • Bar graph

  16. Bar graph box

  17. Bar graph independent axis

  18. Bar graph dependent axis

  19. Bar graph title

  20. Bar graph data

  21. The final product

  22. FAQs • Does it matter if I do a good job? • You make your story clear • You get extra points • You understand other’s graphs • You get your manuscript accepted • How can I remember all of this? • You can’t (yet) • It’s all in the lab manual • With a checklist

  23. The easy way • Use a computer program • Tell it exactly what you want • Graph type • Title • Axis labels (with units), ranges • Data and line types • Lots more possibilities

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