Two axis representations are used in MathGL. The first one consists of normalizing coordinates of data points in axis range (see Axis settings). If SetCut() is true then the outlier points are omitted, otherwise they are projected to the bounding box (see Cutting). Also, the point will be omitted if it lies inside the box defined by SetCutBox() or if the value of formula CutOff() is nonzero for its coordinates. After that, transformation formulas defined by SetFunc() or SetCoor() are applied to the data point (see Curved coordinates). Finally, the data point is plotted by one of the functions.
The range of x, y, z-axis can be specified by SetRange() or ranges functions. Its origin is specified by origin function. At this you can you can use NAN values for selecting axis origin automatically.
There is 4-th axis c (color axis or colorbar) in addition to the usual axes x, y, z. It sets the range of values for the surface coloring. Its borders are automatically set to values of z-range during the call of ranges function. Also, one can directly set it by call SetRange('c', ...). Use colorbar function for drawing the colorbar.
The form (appearence) of tick labels is controlled by SetTicks() function (see Ticks). Function SetTuneTicks switches on/off tick enhancing by factoring out acommon multiplier (for small coordinate values, like 0.001 to 0.002, or large, like from 1000 to 2000) or common component (for narrow range, like from 0.999 to 1.000). Finally, you may use functions SetTickTempl() for setting templates for tick labels (it supports TeX symbols). Also, there is a possibility to print arbitrary text as tick labels the by help of SetTicksVal() function.