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diff --git a/src/gensvm_util.c b/src/gensvm_util.c
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+/**
+ * @file util.c
+ * @author Gertjan van den Burg
+ * @date January, 2014
+ * @brief Utility functions
+ *
+ * @details
+ * This file contains several utility functions for coordinating input and
+ * output of data and model files. It also contains string functions.
+ *
+ */
+#include <stdarg.h>
+
+#include "gensvm_util.h"
+
+FILE *GENSVM_OUTPUT_FILE; 	///< The #GENSVM_OUTPUT_FILE specifies the 
+				///< output stream to which all output is 
+				///< written. This is done through the
+				///< internal (!)
+				///< function gensvm_print_string(). The
+				///< advantage of using a global output 
+				///< stream variable is that the output can
+				///< temporarily be suppressed by importing
+				///< this variable through @c extern and 
+				///< (temporarily) setting it to NULL.
+
+/**
+ * @brief Check if any command line arguments contain string
+ *
+ * @details
+ * Check if any of a given array of command line arguments contains a given 
+ * string. If the string is found, the index of the string in argv is 
+ * returned. If the string is not found, 0 is returned.
+ *
+ * This function is copied from MSVMpack/libMSVM.c.
+ *
+ * @param[in] 	argc 	number of command line arguments
+ * @param[in] 	argv 	command line arguments
+ * @param[in] 	str 	string to find in the arguments
+ * @returns 		index of the string in the arguments if found, 0
+ * 			otherwise
+ */
+int gensvm_check_argv(int argc, char **argv, char *str)
+{
+	int i;
+	int arg_str = 0;
+	for (i=1; i<argc; i++)
+		if (strstr(argv[i], str) != NULL) {
+			arg_str = i;
+			break;
+		}
+
+	return arg_str;
+}
+
+/**
+ * @brief Check if a command line argument equals a string
+ *
+ * @details
+ * Check if any of the command line arguments is exactly equal to a given
+ * string. If so, return the index of the corresponding command line argument.
+ * If not, return 0.
+ *
+ * This function is copied from MSVMpack/libMSVM.c
+ *
+ * @param[in] 	argc 	number of command line arguments
+ * @param[in] 	argv 	command line arguments
+ * @param[in] 	str 	string to find in the arguments
+ * @returns 		index of the command line argument that corresponds to
+ * 			the string, 0 if none matches.
+ */
+int gensvm_check_argv_eq(int argc, char **argv, char *str) 
+{
+	int i;
+	int arg_str = 0;
+	for (i=1; i<argc; i++)
+		if (strcmp(argv[i], str) == 0) {
+			arg_str = i;
+			break;
+		}
+
+	return arg_str;
+}
+
+
+/**
+ * @brief Print a given string to the specified output stream
+ *
+ * @details
+ * This function is used to print a given string to the output stream
+ * specified by #GENSVM_OUTPUT_FILE. The stream is flushed after the string 
+ * is written to the stream. If #GENSVM_OUTPUT_FILE is NULL, nothing is
+ * written. Note that this function is only used by note(), it should never be
+ * used directly.
+ *
+ * @param[in] 	s 	string to write to the stream
+ *
+ */
+static void gensvm_print_string(const char *s)
+{
+	if (GENSVM_OUTPUT_FILE != NULL) {
+		fputs(s, GENSVM_OUTPUT_FILE);
+		fflush(GENSVM_OUTPUT_FILE);
+	}
+}
+
+/**
+ * @brief Parse a formatted string and write to the output stream
+ *
+ * @details
+ * This function is a replacement of fprintf(), such that the output stream
+ * does not have to be specified at each function call. The functionality is
+ * exactly the same however. Writing the formatted string to the output stream
+ * is handled by gensvm_print_string().
+ *
+ * @param[in] 	fmt 	String format
+ * @param[in] 	... 	variable argument list for the string format
+ *
+ */
+void note(const char *fmt,...)
+{
+	char buf[BUFSIZ];
+	va_list ap;
+	va_start(ap,fmt);
+	vsprintf(buf,fmt,ap);
+	va_end(ap);
+	(*gensvm_print_string)(buf);
+}