Update README.md

Author: davidsecacontrol

README.md

@@ -9,29 +9,34 @@ Instantiate the 'Filter' class and provide the filter weights:
 ```c++
   #include "Filter.h"
   Filter<OUTPUT_TYPE,FITLER_SIZE> my_filter;
-  my_filter.(input_coeffs,output_coeffs);
+  my_filter.SetCoefficients(input_coeffs,output_coeffs);
 ```
 
 Now, every new measurement can be filtered (See examples 1,2):
 ``` c++
-  float new_filtered_value = my_filter.Update(new_value);
+  OUTPUT_TYPE new_filtered_value = my_filter.Update(new_value);
 ```
 
-The Z transform coefficients can also be supplied and the library will automatically convert them to the filter weights:
+The Z transform numerator & denominator coefficients can also be supplied and the library will automatically convert them to the filter weights:
 ``` c++
   my_filter.SetCoefficientsFromZTransform(numerator,denominator);
 ```
+The state can be cleared to reinitialize the filter:
+``` c++
+  my_filter.SetState();
+```
 
-Although not recommended, it is possible to change the filter states to avoid transients:
+Finally although not recommended, it is possible to change the filter states:
 ``` c++
   my_filter.SetState(input_state,output_state);
 ```
 
+
 ## Compilation
 This repository uses CMake. It is already configured for the [CMake Tools extension](https://marketplace.visualstudio.com/items?itemName=ms-vscode.cmake-tools) and runs on the default generator.
 
 ## Documentation
-This reopsitory uses doxygen. For Windows, run `doxygen Doxyfile`.
+This repository uses doxygen. For Windows, run `doxygen Doxyfile`.
 
 ## Future Updates
 This repository is also a learning experience. The expected roadmap is:
@@ -42,7 +47,7 @@ This repository is also a learning experience. The expected roadmap is:
 - [ ] Add other standard recomendations (AUTOSAR/ C++ standards)
 - [X] Keep library std-free
 - [X] Add CMake compilation
-- [ ] Add google tests                                          
+- [X] Add google tests                                          
 - [ ] Add pre-designed filtering options
 - [X] Add doxygen docuemntation