1. TICK_FR.M draws tick labels at given frequency, i.e. each second, third ... Example below shows each fifth  x-axis tick labeled.
     Example
 

2. LINE_STYLE.M shows all contour levels exceeding level_0 in solid, those below level_0 in dashed, and that equal to level_0 in bold. Default level_0=0.
    Example

3. LABEL_STYLE.M makes all contour labels vertically aligned and shows them on a white background. Note, the same affects all text objects paranted to current axes.
    Example

4. COLORBAR4.M assigns user-defined colors to contourf plot. Now one can make subplots with different color gammas.
     Example

5. COLORBAR5.M changes "color shading"  in  contourf plot to "cross-hatching".
    Example

6. QUIVER_SCALE.M inserts arrow scale into a quiver plot.
    Example

7. PATCH_ERROR.M displays the errorcorridor by  shading or cross-hatching
    Example

8. TICK_GEO changes axis ticks from [-90 ... 90] to [90S... EQ ...90N] and from [-180 ... 180] to [180W ...180E]
    Example

9. POINT2AREA  calculates the broken linear line that bounds the given array of points
    Example

10. MATLAB2GRADS saves a number of arrays in the GRADS format (DAT and CTL).
    Codes