Line graph widgets

Author(s): Isabel Martín.

Version: 1.10#7 (2006/4/26, 19:22:13 CEST)

Version of last change: 1.9#270 (2004/1/1, 14:19:56 CET)

This module defines predicates which show line graph widgets. All eight predicates exported by this module plot two-variable data. Each point is defined by its X-Y coordinate values. Every predicate share the following features:

• A dataset is defined by three lists xvector, yvector and attributes. The arguments named XVectors (or XVs), YVectors (or YVs) and LAtts(6) contain this information. Those arguments must be lists whose elements are also lists. The first dataset is defined by the firts element of the three lists, the second dataset is defined by the second element of the three lists and so on.
• Numeric values for the vector elements are needed. We will use two vectors to represent the X-Y coordinates of each set of data plotted. In these predicates the vectors can have different number of points. However, the number of elements in xvector and yvector that pertain to a certain dataset must be, obviously, equal.
• The active line color is blue, which means that when you select a legend element, the corresponding line turns into navyblue.
• The user can either select the appearance for the lines and the points or not. See the attributes/1 type definition. Thus, the user can call each predicate in different ways ways.
• The graph has a legend and one entry (symbol and label) per dataset.
• If you do not want to display text in the elements header, barchart title, xaxis title, yaxis title or footer, simply give " as the value of the argument.
• The predicates check whether the format of the arguments is correct as well. The testing process involves some verifications. If one or both vectors are empty, the exception error2 will be thrown. If the vectors contains elements but are not correct, the exception error4 will be thrown.

• Usage and interface (gengraph2)
• Documentation on exports (gengraph2)

Usage and interface (gengraph2)

Documentation on exports (gengraph2)

PREDICATE: graph_b2/9:

graph_b2(Header, GTitle, XTitle, XVectors, YTitle, YVectors, LAtts, Footer, Sm)

Besides the features mentioned at the begining of the module chapter, the displayed graph generated calling this predicate has the following distinguish characteristics:

• The plotting area background color is black.
• The cross hairs color is white.
• The axis limits are determined from the data.

Example:

graph_b2('This is the header text',
  'Graph_title',
  'xaxistitle',
  [[20,30,59],[25,50]],
  'yaxixtitle',
  [[10,35,40],[25,50]],
  [['line1','Blue','Yellow'],['line2']],
  'footer',
  'natural').

PREDICATE: graph_b2/13:

graph_b2(Header, GT, XT, XVs, XMax, XMin, YT, YVs, YMax, YMin, LAtts, Footer, Smooth)

In addition to the features brought up at the begining of the module chapter, this graph has the following:

• The plotting area background color is black.
• The cross hairs color is white.
• You can set the maximum and minimum values for the graph axes.

Example:

graph_b2('This is the header text',
  'Graph_title',
  'xaxistitle',
  [[20,10,59],[15,30,35]],
  50,
  _,
  'yaxixtitle',
  [[10,35,40],[25,50,60]],
  50.5,
  _,
  [['line1','Blue','Yellow'],['line','MediumTurquoise','Plum']],
  'footer',
  'step').

PREDICATE: graph_w2/9:

graph_w2(Header, GT, XT, XVectors, YTitle, YVectors, LAtts, Footer, Smooth)

This predicate is quite similar to graph_b2/9. The difference lies in the graph appearance, as you can see below.

• The plotting area background color is white.
• The cross hairs color is black.

Example:

graph_w2('This is the header text',
  'Graph_title',
  'xaxistitle',
  [[10,30,59],[25,50]],
  'yaxixtitle',
  [[10,35,40],[25,40]],
  [['element1','Blue','DarkOrchid'],['element2','DarkOliveGreen',
    'Firebrick']],
  'footer',
  'natural').

PREDICATE: graph_w2/13:

graph_w2(Header, GT, XT, XV, XMax, XMin, YT, YVs, YMax, YMin, LAtts, Footer, Smooth)

This predicate is comparable to graph_b2/13. The differences lie in the plot background color and in the cross hairs color, wich are white and black respectively.

Example:

graph_w2('This is the header text',
  'Graph_title',
  'xaxistitle',
  [[10,30,59],[10,35,40]],
  80,
  _,
  'yaxixtitle',
  [[10,35,40],[25,50,60]],
  50,
  _,
  [['element1','Blue','Green'],['element2','Turquoise','Black']],
  'footer',
  'linear').

PREDICATE: scattergraph_b2/8:

scattergraph_b2(Header, GT, XT, XVectors, YT, YVectors, PAtts, Footer)

Apart from the features brought up at the beginning of the chapter, the scatter graph displayed when invoking this predicate has the following features:

• The plotting area background color is black.
• The cross hairs color is white.
• The axis limits are determined from the data.

Example:

scattergraph_b2('This is the header text',
  'Graph_title',
  'xaxistitle',
  [[10,15,20],[8,30,40]],
  'yaxixtitle',
  [[10,35,20],[15,11,21]],
  [['element1','Blue','Yellow'],['element2','MediumTurquoise','Plum']],
  'footer').

PREDICATE: scattergraph_b2/12:

scattergraph_b2(Header, GT, XT, XVs, XMax, XMin, YT, YVs, YMax, YMin, PAtts, Footer)

The particular features related to this predicate are described below:

• The plotting area background color is black.
• The cross hairs color is white.
• You can set the minimum and maximum limits of the axes. Data outside the limits will not be plotted.

Example:

scattergraph_b2('This is the header text',
  'Graph_title',
  'xaxistitle',
  [[20,30,50],[18,40,59]],
  50,
  _,
  'yaxixtitle',
  [[10,35,40],[25,50,60]],
  50,
  _,
  [['point dataset1'],['point dataset2']],
  'footer').

PREDICATE: scattergraph_w2/8:

scattergraph_w2(Header, GTitle, XTitle, XVs, YTitle, YVs, PAtts, Footer)

This predicate is quite similar to scattergraph_w1/8 except in the following:

• The plotting area background color is black.
• The cross hairs color is white.
• If the user do not provide the colors of the points, they will be chosen among the lighter ones.

Example:

scattergraph_w2('This is the header text',
  'Graph_title',
  'xaxistitle',
  [[20,30,40,15,30,35,20,30]],
  'yaxixtitle',
  [[10,30,40,25,20,25,20,25]],
  [['set1','cross',4]],
  'footer').

PREDICATE: scattergraph_w2/12:

scattergraph_w2(Header, GT, XT, XVs, XMax, XMin, YT, YVs, YMax, YMin, PAtts, Footer)

This predicate is comparable to scattergraph_w2/13, the differences between them are listed below:

• The plotting area background color is white.
• The cross hairs color is black.

Example:

scattergraph_w2('This is the header text',
  'Graph_title',
  'xaxistitle',
  [[20,10,59],[15,30,50]],
  150,
  5,
  'yaxixtitle',
  [[10,35,40],[25,20,60]],
  _,
  -10,
  [['e1','Blue','Yellow'],['e2','MediumTurquoise','Plum']],
  'footer').

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