![]() Graphical excellence consists of complex ideas communicated with clarity, precision, and efficiency.Graphical excellence is the well-designed presentation of interesting data – a matter of substance, of statistics, and of design.“The relational graphic – in its barest form, the scatterplot and its variants – is the greatest of all graphical designs.”.About 40% of graphics in the modern scientific literature have relational form.“This meant, quite simply but quite profoundly, that any variable quantity could be placed in relationship to any other variable quantity, measure for the same units of observation.”.“Graphical design was at last no longer dependent on direct analogy to the physical world.”.Replacing them with abstract concepts was a big step.The x and y-axes of a graph were almost always latitude and longitude.More Abstract Designs: Relational Graphics.Once the viewers understand the design of one slice, they have immediate access to data in all other slices.Small-Multiples Displays with time as the index variable.“Time-series plots can be moved towards causal explanation by smuggling additional variables into the graphic design.”.It can happen that time itself is the causal mechanism. ![]() “The problem with time-series is that the simple passage of time is not a good explanatory variable: descriptive chronology is not causal explanation.”.The before-after time-series is powerful if given appropriate data.Multiple time-series displays can encourage comparative multivariate analysis.“The natural ordering of the time scale gives this design a strength and efficiency of interpretation found in no other graphic arrangement.”.Why waste the power of data graphics on simple linear changes, which can usually be better summarized in one or two numbers?” “Time-series displays are at their best for big data sets with real variability.Most frequently used form of graphic design.Data-collection techniques may differ slightly based on local differences which may lead to bias.They wrongly equate the importance of a region with its size instead of population.Computers have increased the density of information some 5000- fold.They can carry a large amount of data in a small space (high data density).“Small, noncomparative, highly labelled data sets usually belong in tables.”.“Graphical excellence is nearly always multivariate.”.be closely integrated with the statistical and verbal descriptions of a data set.”.serve a reasonably clear purpose: description, exploration, tabulation, or decoration.reveal the data at several levels of detail, from a broad overview to the fine structure.encourage the eye to compare different pieces of data.avoid distorting what the data have to say.induce the viewer to think about the substance rather than about methodology, graphic design, the technology of graphic production, or something else.Datum = 1 data point.īook Notes PART I – GRAPHICAL PRACTICE Chapter 1 – Graphical Excellence The scatterplot and its variants (relational graphics) are the greatest of all graphical designs.Time-series is the most common graphical design.The vast majority of graphs should be wider than tall.“Graphical excellence is that which gives the viewer the greatest number of ideas in the shortest time with the least ink in the smallest space.”.Graphical excellence is nearly always multivariate.Tables usually outperform graphics in reporting on small data sets of 20 numbers or less.More information is better than less information.
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