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README.md

@@ -32,9 +32,6 @@ Import *plotter* module somewhere at the beginning of your script
 import plotter
 ```
 
-## Plotting
-<!-- Some usage examples are collected [in the gallery](http://tesla.parallel.ru/vonopr/nse-python/-/jobs/artifacts/develop/file/examples.pdf?job=build_docs). -->
-
 ### get variable names from file 
 Use `plotter.dump(filename)` to get variable names in file `filename`.
 Data must be stored either in *Tecplot* ASCII file with *.plt* or *.nsx* extensions. 
@@ -69,6 +66,13 @@ plotter.ani_plot(filename)
 ```
 saves animation of XY plots of 1D data contained in file `filename` into *out/oname* file.
 
+### plotting a 2D data
+Calling 
+```python
+plotter.plot_contour(filename)
+```
+saves XY contour plots of 2D data contained in file `filename` into *out/oname* file.
+
 ### plotting an averaged by x and y coordinates 3D data
 Calling 
 ```python