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--- tufte [2010/01/23 11:25]
marcus
+++ tufte [2010/04/01 19:41] (Actual)
marcus
@@ Linha 1: / Linha 1: @@
-Here are two examples of using [[http://www.gnuplot.info|gnuplot]] to visualize graphs in the style proposed by Edward R. Tufte in [[http://www.edwardtufte.com/tufte/books_vdqi|The Visual Display of Quantitative Information]].
+==== On Tuftefying gnuplot ====
-=== Quartile plots ===
+Here are four examples of using [[http://www.gnuplot.info|gnuplot]] to visualize graphs in the style of Edward R. Tufte (see [[http://www.edwardtufte.com/tufte/books_vdqi|The Visual Display of Quantitative Information]]).
+=== Quartile plot ===
 The first is a quartile plot from page 125. The [[tufte.dat|data file]] has entries
 <code>
@@ Linha 10: / Linha 12: @@
 <code>
-#!/usr/bin/gnuplot -persist
+#!/usr/bin/gnuplot
 set term svg
 set output "tufte.svg"
@@ Linha 20: / Linha 22: @@
                    "" using 1:4 with points pt 7 ps 0.75 lt -1 notitle
 </code>
+The result is
 {{:tufte.png}}
+=== Temperature ===
+The next plot shows the development of the earth's surface temperature. The [[monthly-averages.dat|data]] is from the [[http://www.giss.nasa.gov|NASA Goddard Institute for Space Studies]]. Each line contains
+<code>
+year minimum average maximum
+</code>
+The graph again combines a vector plot to show the total range and a point plot for the averages. Note the rangelimit option for the axes.
+<code>
+#!/usr/bin/gnuplot
+set term svg enh
+set output "monthly-averages.svg"
+set title "Surface temperature from 1850-2009"
+set ylabel "Different to average 1961-1990 [{}^oC]"
+set xlabel "Year"
+set border 3 front linetype -1 linewidth 1.000
+set xtics border in nomirror rangelimit
+set ytics border in nomirror rangelimit
+plot "./monthly-averages.dat" using 1:2:(0):($4-$2) with vec nohead lt -1 notit, "" using 1:3 w p lt 1 ps 0.6 pt 7 notit
+</code>
+{{:monthly-averages.png}}
+=== Bar chart ===
+Here is the redesigned bar chart at the bottom of page 127. The data are simple y-values, one per line:
+<code>
+value
+</code>
+and
+<code>
+#!/usr/bin/gnuplot
+set term svg enh
+set output "barchart.svg"
+unset xtics
+set style line 1 linecolor rgbcolor "white" lw 2
+set style line 2 linecolor rgbcolor "#808080" lw 2
+set border 1 ls 2
+set ytics 5,5,15 border nomirror format "%.0f%%" font "Times_New_Roman,18" textcolor rgbcolor "black" offset -2 out scale 2.0
+set grid front ls 1
+plot [-1:11.25] [0:20] "barchart.dat" using 0:1:(0.5) with boxes fill solid 1.4 noborder ls 2 notitle
+</code>
+produces
+{{:barchart.png?480}}
+=== Dot-dash-plot ===
+And finally, a dot-dash-plot in the style of p. 133. (The data are xy value pairs).
+<code>
+#!/usr/bin/gnuplot -persist
+set term svg enh
+set output "dotdash.svg"
+unset border
+set xtics textcolor rgb "white" out nomirror
+set ytics textcolor rgb "white" out nomirror
+set offsets 0.005, 0, 0, 1
+plot "dotdash.dat" using 1:2:xtic(1):ytic(sprintf("%f",$2)) pt 7 ps 1 notitle
+</code>
+produces
+{{:dotdash.png}}
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