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Scientific Visualization

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Giuseppe Jurman

on 23 June 2015

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Transcript of Scientific Visualization

basic principles of scientific
data visualization

giuseppe jurman
webvalley intl 2015
a quick tour
horror gallery
american journal of human genetics, 2005
journal of the american statistical association, 2005
cell, 2004
statistical science, 1994
nutrition research and practice, 2012
this may well be the worst graphic ever to find its way into print
" (tufte)
the only really good pie chart
: synthesization of large amount of data in effective graphics
~ year 950
~ year 1790
w. playfair
~ year 2014
numbers alone might not be enough...
f. j. anscombe, g
raphs in statistical analysis
, the american statistician, 1973
a good graph should...
show the data
focus on substance rather than methodology
avoid distorting what data have to say
present many numbers in a small space
make large dataset coherent
encourage the reader to compare different pieces of data
reveal the data at several level of detail
above all show the data
finally, show the data
bmc medical genomics, 2008
create the simplest graph that conveys the information you want to convey
focus on visualizing patterns or on visualizing details, depending on the plot
select meaningful axis ranges
data transformations and carefully chosen graph aspect ratios
can be used to emphasize rates of change for timeseries data
plot overlapping points in a way that density differences show
do not connect data points unless it is meaningful to do so
aggregate larger datasets in meaningful ways
keep axis ranges as similar as possible to compare variables
select an appropriate color scheme based on the type of data
adolf loos (1910) "
ornament is a crime
maximize the data-ink ratio
C.J. Minard (1869)
Napoleon's 1812 Russian campaign
the best statistical graphic ever drawn
" (Tufte)
the size of the army
the geographical coordinates
the direction that the army was traveling
the temporal location of the army
the weather temperature along the path of the retreat
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