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General description of package

The plot is created by the executable module surfer, that reads a control file (as the widely known packages "contour", "plotxy", and "gnuplot" do). The name of the control file is a single (and obligatory) argument of the surfer command. A structure of the control file is described below. After the surfer starts a graphic window with a color 3-dimensional figure emerges.

Figure 1.1 3-dimensional image

The main pannel has a following structure:

Figure 1.2 Main pannel

A user may push the Opt button to prescribe some additional parameters of the image and then push the 3d button (or right mouse button) to replot the image. A user may also rotate figure by the middle mouse button.

In order to get a contour a user has to push Contour button, while to get a map - Topo button.

Figure 1.3 Contour and topographic image

After plotting the color image on the screen a user has a possibility to create and view a PostScrpt file of the image. For this purpose a user has to push the Create PS button (the name of file may be also prescribed in the corresponding panel string), after that a new window is created with a PostScript (color or monochrome) image. The emerged cmdtool window can be quitted later by a user. The PostScript file with the assigned name can be plotted then at the printer using the standard UNIX command.

Figure 1.4 Color postscript file images

Figure 1.5 Monochrome postscript file images

A user may currently correct the control and data files without exit the program surfer. He may also change the names of both files and then push the Read button. A new control file and corresponding data-file will be read. After renewing the data a user may continue the graphic analysis of the different forms of image.

A user may fit a color palette of the objects on the screen (3D-figure, contour or topo maps) in accordance with his own taste. For this purpose he has to click the Palette button. The changes of palette, made by the user, are retained to be valid for the PostScript image too.

A user may turn back the image, exchange the X,Y axes, or inverse values along the X-axis and/or Y-axis.

A user may cut the desirable horizontal layer of the 3D image. The clipped layer is automatically expanded up to whole range of Z-axis. This tool enables one to make the thorough graphic investigation of some rather thin layer in details, when the ordinary image of the whole figure does not display a delicate configuration of the layer under interest. The mode providing this option is set by the Cut button.

All local extremums of the function may be optionally highlighted (by the little circles) on the surface in Contour or Topo mode of image.

Figure 1.6 Drawing the local extremums on the plain image

A user may graphically measure the coordinates of the arguments as well as a function in any point of surface. Measuring of coordinates is provided in Contour or Topo modes. This provides for example the graphic analysis of surface near its different local extremums. The mode for coordinate measuring is set by the Measurer button.

There is a possibility of zooming in the Contour or Topo mode. So the little piece of surface may be expanded up to the whole image box and all color palette will be realized in limits of chosen part of figure. This enables to achieve the more high precision of measuring of the coordinates.

There is a possibility to combine the PostScript file upon the several different images in order to prepare the illustration for papers and scientific reports.

Figure 1.7. Forming the collage PostScript file

The standard X-window resize function is realized, so a user may significantly enlarge the image to provide the delicate graphic investigation of some local region under interest.

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