Creating a Countor Map

Overview
By selecting [Option] - [Mode] - [Contour], you can create a contour map with gradation.
Contour segments are drawn with linear interpolation method.
Preparation
Create a text data file which contains x, y, and measured (V) values. Then load the data file.
(In the following example, vertical coordinate is named as "z". In some disciplines, vertical coordinate is named as "z". Moreover, z is taken as positive downward in some cases.)
In some cases, blank zones are formed in the contour map.
In such case, please change order of row arbitrary.
If measured points are arranged as grid-wise, you can avoid such blank error by arranging number of measurement points rightward (i.e. same Y-value) and return at the end of lines: e.g:
1 2 3 4
5 6 7 8
9 10 11 12
Therefore, please arrange as following example:
x, y, z
0, 0, 1.1
1, 0, 0.9
2, 0, 0.8
3, 0, 0.85
0, 2, 0.9
1, 2, 1.0
2, 2, 0.95
3, 2, 0.8
0, 5, 0.9
1, 5, 0.95
2, 5, 0.8
3, 5, 0.75
0, 10, 0.8
1, 10, 0.7
2, 10, 0.65
3, 10, 0.8
Column No
Select three columns in the data file and relate them to axies. "V" is the axis which is perpendicular to x and y axis.
By the way, datafile browser in the left-bottom is read-only.
Loading Range
You can specify the range of lines to be loaded and plotted. To specify the last line to be loaded, input the line number into the combobox, and pless [Enter]. If you want to plot all of the columns, leave there as the default setting (From [ 1] to [end]). Comment lines are automatically neglected.
Drawing
Enter minimum and maximum values to "From" and "To", respectively. If you want set increments logalithmic, enter integer power of 10 such as 0.01 or 100.
Division: number of lines between maximum and minimum. Increment of drawn value at common difference (in logarithmic scale, common ratio).
Logarithmic scale: Contour lines are drawn at common ratio (integer power of 10).
Gradation: gradation is painted. Thickness is proportional to average value in each triangle which is formed by nearest three points. Area at maximum value is pained at set color and white at mimimum value.
Attributes of Line

Style | You can select one in six styles.
Width | Enter line width in millimeter.
Color | If you double-click the painted rectangle, a color-select dialogbox will appear.