Own work, created with Gnuplot. Data is taken from results of opinion polls.

 

This plot was created with Gnuplot.

Poll data in "Umfragen.txt":

#Institut                       Tag     Santos      Mockus      Sanin       Andere      Unentschieden
Invamer_Gallup                  24      34.2        10.4        23.3        23.7        8.4
Datexco                         26      34.1        8.9         21.7        23.9        11.4
Ipsos_Napoleón_Franco           27      36          9           17          24          14
Centro_Nacional_de_Consultoría  27      28.6        11.3        21.9        17.1        21.1
Centro_Nacional_de_Consultoría  39      37          22          20          14          7
Datexco                         40      29.5        24.8        16.4        11.3        17.2
Centro_Nacional_de_Consultoría  46      36          29          19          11          5
Ipsos_Napoleón_Franco           47      30          20          12          23          15
Centro_Nacional_de_Consultoría  53      35          34          12          15          3
Ipsos_Napoleón_Franco           57      29          38          11          12          10
Invamer_Gallup                  59      34.2        31.6        16.2        14.4        3.5
Centro_Nacional_de_Consultoría  60      34.0        39.0        11.0        12          4.0
Datexco                         61      26.7        38.7        9.8         8.5         16.3
Centro_Nacional_de_Consultoría  67      34          38          11          13          4
Datexco                         68      25.2        37.7        6.7         8.7         21.7
Ipsos_Napoleón_Franco           70      35          34          8           11          12
Datexco                         75      29.3        32.8        5.6         15.3        13.8
Universidad_de_Medellín         81      32.9        37.4        8.1         12.2        9.2
Centro_Nacional_de_Consultoría  81      39          34          9           13          5
Datexco                         82      35          34          9           10          5
Ipsos_Napoleón_Franco           83      34          32          6           14          14

Poll Sources:

Invamer Gallup 2010-03-24, Datexco 2010-03-26, Ipsos Napoleón Franco 2010-03-27, Centro Nacional de Consultoría 2010-03-27, Centro Nacional de Consultoría 2010-04-08, Datexco 2010-04-09, Centro Nacional de Consultoría 2010-04-15, Ipsos Napoleón Franco 2010-04-16, Centro Nacional de Consultoría 2010-04-22, Ipsos Napoleón Franco 2010-04-26, Invamer Gallup 2010-04-28, Centro Nacional de Consultoría 2010-04-29, Datexco 2010-04-30, Centro nacional de consultoría 2010-05-06, Datexco 2010-05-07, Ipsos Napoleón Franco 2010-05-09, Datexco 2010-05-14, Universidad de Medellín 2010-05-20, Centro Nacional de Consultoria 2010-05-20, Datexco 2010-05-21,

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