expand README, use english only

1 files changed, 50 insertions, 10 deletions

diff --git a/README.md b/README.md
index b53e02c..e808bb0 100644
--- a/README.md
+++ b/README.md
@@ -1,11 +1,12 @@
-#Rozwiązanie zadania - mnożenie macierzy w fortranie#
-Niniejsze repozytorium zawiera realizację [zadania pierwszego](link do pdf'a) kursu jęzka fortran na AGH w Krakowie
+#Task solution - matrix multiplication in fortran#
+This repository contains the realization of the [first task](http://home.agh.edu.pl/~macwozni/fort/zadanie1.pdf) of the fortran programming language course at AGH in Cracov.  
 
-##Struktura repozytorium##
+##The directory structure##
 
     CMakeLists.txt
     README.md
-    build/
+    make_results.sh
+    template.gnuplot
     src/
         blockmath.F90
         testing.F90
@@ -33,12 +34,51 @@ Niniejsze repozytorium zawiera realizację [zadania pierwszego](link do pdf'a) k
         bett_16
         block_16
         bett2_16
+        wykres4.pdf
+        wykres8.pdf
+        wykres16.pdf
 
-####CmakeLists.txt####
-This file contains CMake definitions for building fortran sources. It does not, however, define the actions of running the program, generating results, nor plotting
+###CmakeLists.txt###
+This file contains CMake definitions for building fortran sources. It does not, however, define the actions of running the program, generating results, nor plotting.   
 
-####src/####
-This directory contains the fortran sources of the project, namely modules sources `*math.F90` and main program source `main.F90`
+###make_results.sh###
+This script runs built program under different options and writes measured multiplication times in `res/{naiv,bett,dot,mat,bett2,block}_{4,8,16}` while also running gnuplot to generate their corresponding plots into `res/wykres{4,8,16}.pdf`.   
 
-####res/####
-This directory contains text results of matrix multiplication time measuring (files without extension)
+###template.gnuplot###
+It's the gnuplot script for generating plots from text files in `res`. In this script `[kind]` has to be replaced with actual number (for example with the help of `sed`, see `make_results.sh` for how it's done).   
+
+###src/###
+This directory contains the fortran sources of the project, namely modules sources `*math.F90` and main program source `main.F90`.   
+
+###res/###
+This directory contains text results of matrix multiplication time measuring (files without extension) and their corresponding plots (pdf files).   
+
+##Building##
+As a prerequisite, CMake, make and a fortran compiler, either gfortran or ifort, are required (didn't want to support proprietary compiler :c but had to).   
+
+`make_results.sh` assumes an out-of-source build in `build/` has been performed.   
+
+    $ mkdir build
+    $ cd build
+    $ cmake ../
+    $ make mull
+
+The CMake configuration provided allows one to specify one of twosets of compiler flags.  The default is RELEASE and it can be changed to DEBUG using
+
+    $ cmake .. -DCMAKE_BUILD_TYPE=DEBUG
+
+##Running##
+The executable is `mull`.   
+
+     $ ./mull
+     Usage: mull KIND IMPLEMENTATION
+     where KIND is one of: 4, 8, 16
+      IMPLEMENTATION is one of: naiv, bett, dot, mat, bett2, block
+
+When ran with proper arguments, it prints matrix sizes and multiplication times in columns.   
+
+Text files and plots in `res/` can be regenerated by issuing
+
+    $ ./make_results.sh
+
+from within the main project directory (may take up to several tens of minutes).