Support for basic ODE function added

2 files changed, 49 insertions, 39 deletions

diff --git a/src/c/differential_calculus/ode/dodea.c b/src/c/differential_calculus/ode/dodea.c
new file mode 100644
index 00000000..ff3cbdec
--- /dev/null
+++ b/src/c/differential_calculus/ode/dodea.c
@@ -0,0 +1,49 @@
+/* Copyright (C) 2016 - IIT Bombay - FOSSEE
+
+ This file must be used under the terms of the CeCILL.
+ This source file is licensed as described in the file COPYING, which
+ you should have received as part of this distribution.  The terms
+ are also available at
+ http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
+ Author: Siddhesh Wani
+ Organization: FOSSEE, IIT Bombay
+ Email: toolbox@scilab.in
+*/
+
+//Function for solving ODEs using GSL library
+
+#include "ode.h"
+#include "types.h"
+#include <gsl/gsl_errno.h>
+#include <gsl/gsl_matrix.h>
+#include <gsl/gsl_odeiv2.h>
+
+
+void dodea(double *initial_value, double start_time, double end_time, \
+			char *ode_function, double nequs, double eps_abs, double eps_rel, \
+			double step_size, int *params, double *out)
+{
+	double t = start_time;
+	//Initialise output to initial state
+	int counter = 0;
+	for (counter = 0; counter<nequs;counter++)
+	{
+		out[counter] = initial_value[counter];
+	}
+
+	//Setup ODE related parameters
+	gsl_odeiv2_system sys = {ode_function, NULL, 2, params};
+
+	gsl_odeiv2_step    *s = gsl_odeiv2_step_alloc (gsl_odeiv2_step_rkf45, nequs);
+  	gsl_odeiv2_control *c = gsl_odeiv2_control_y_new (eps_abs, eps_rel);
+  	gsl_odeiv2_evolve  *e = gsl_odeiv2_evolve_alloc (nequs);
+  
+  	while(t < end_time)
+  	{
+  		gsl_odeiv2_evolve_apply_fixed_step (e, c, s, &sys, &t, step_size, out);
+	}
+
+	gsl_odeiv2_evolve_free (e);
+  	gsl_odeiv2_control_free (c);
+  	gsl_odeiv2_step_free (s);
+}
diff --git a/src/c/differential_calculus/ode/doded.c b/src/c/differential_calculus/ode/doded.c
deleted file mode 100644
index b544c422..00000000
--- a/src/c/differential_calculus/ode/doded.c
+++ /dev/null
@@ -1,39 +0,0 @@
-// Copyright (C) 2016 - IIT Bombay - FOSSEE
-//
-// This file must be used under the terms of the CeCILL.
-// This source file is licensed as described in the file COPYING, which
-// you should have received as part of this distribution.  The terms
-// are also available at
-// http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
-// Author: Siddhesh Wani
-// Organization: FOSSEE, IIT Bombay
-// Email: toolbox@scilab.in
-
-#include "ode.h"
-#include "types.h"
-#include <gsl/gsl_errno.h>
-#include <gsl/gsl_matrix.h>
-#include <gsl/gsl_odeiv2.h>
-
-
-void doded(double *initial_value, double start_time, double end_time, \
-			char *ode_function, double nequs, double eps_abs, double eps_rel, \
-			double step_size, double *out)
-{
-	double t = start_time;
-	//Setup ODE related parameters
-	gsl_odeiv2_system sys = {ode_function, NULL, 2, NULL};
-
-	gsl_odeiv2_step    *s = gsl_odeiv2_step_alloc (gsl_odeiv2_step_rkf45, nequs);
-  	gsl_odeiv2_control *c = gsl_odeiv2_control_y_new (eps_abs, eps_rel);
-  	gsl_odeiv2_evolve  *e = gsl_odeiv2_evolve_alloc (nequs);
-  
-  	while(t < end_time)
-  	{
-  		gsl_odeiv2_evolve_apply_fixed_step (e, c, s, &sys, &t, step_size, &out);
-	}
-
-	gsl_odeiv2_evolve_free (e);
-  	gsl_odeiv2_control_free (c);
-  	gsl_odeiv2_step_free (s);
-}