Learning-phase.md

+# Learning phase
+
 This is a necessary phase prior to the normal EAR utilization and is a kind of hardware characterization of the nodes. During the phase a matrix of coefficients are calculated and stored. These coefficients will be used to predict the energy consumption and performance of each application.
 
 Please, visit the learning phase [wiki page](https://gitlab.bsc.es/ear_team/ear_learning/-/wikis/home) to read the manual and the [repository](https://gitlab.bsc.es/ear_team/ear_learning) to get the scripts and the kernels.
+
+## Tools
+
+The following table lists tools provided with EAR package to work with coefficients computed during the learning phase.
+
+| **Name**       	| **Description**                                        	| **Basic arguments**                       	|
+|----------------	|--------------------------------------------------------	|-------------------------------------------	|
+| coeffs_compute 	| Computes the learning coefficients.                    	| \<save path\> \<min_freq\> \<nodename\>   	|
+| coeffs_default 	| Computes the default coefficients file.                	|                                           	|
+| coeffs_null    	| Creates a dummy configuration file to be used by EARD. 	| \<coeff_path\>, \<max_freq\> \<min_freq\> 	|
+| coeffs_show    	| Shows the computed coefficients file in text format.   	| \<file_path\>                             	|
+
+> Use the argument `--help` to expand the application information and list the admitted flags.
+
+### Examples
+
+Compute the coefficients for the node `node1001` in which the minimum frequency set during the learning phase was 1900000 KHz
+
+`./coeffs_compute /etc/coeffs 1900000 node1001`