Update README.md

README.md

@@ -19,6 +19,29 @@ http://www.htslib.org/
 ### libBigWig
 Clone the libBigWig repository from GitHub: https://github.com/dpryan79/libBigWig
 
+    git clone https://github.com/dpryan79/libBigWig.git
+
+Compile it and set the environment variables for BAMscale
+
+    cd libBigWig/
+    make
+    export LIBBIGWIG_DIR=`pwd`
+    export CPPFLAGS="-I $LIBBIGWIG_DIR"
+    export LDFLAGS="-L $LIBBIGWIG_DIR -Wl,-rpath,$LIBBIGWIG_DIR"
+
+## Installation
+
+After compiling the libBigWig library and samtools (if not already installed) clone the BAMscale from GitHub
+
+    git clone https://github.com/ncbi/BAMscale.git
+
+and go to the BAMscale folder to compile the program:
+
+    cd BAMscale/
+    make
+
+A bin folder will be created with the BAMscale executable.
+
 ## Usage
 
 ### Peak quantification