added method parameter in first_order_filters

wetb/signal_tools/filters/cy_filters.py

@@ -23,7 +23,7 @@ def cy_low_pass_filter(inp, delta_t, tau):  #cpdef cy_low_pass_filter(np.ndarray
 
     return output
 
-def cy_dynamic_low_pass_filter(inp, delta_t, tau, method):  #cpdef cy_dynamic_low_pass_filter(np.ndarray[double,ndim=1] inp, double delta_t, np.ndarray[double,ndim=1] tau, int method):
+def cy_dynamic_low_pass_filter(inp, delta_t, tau, method=1):  #cpdef cy_dynamic_low_pass_filter(np.ndarray[double,ndim=1] inp, double delta_t, np.ndarray[double,ndim=1] tau, int method=1):
     #cdef np.ndarray[double,ndim=1] output, alpha
     #cdef int i
 

wetb/signal_tools/filters/first_order.py

@@ -6,11 +6,11 @@ Created on 10/01/2015
 import numpy as np
 from wetb.signal_tools.filters import cy_filters
 
-def low_pass(input, delta_t, tau):
+def low_pass(input, delta_t, tau, method=1):
     if isinstance(tau, (int, float)):
         return cy_filters.cy_low_pass_filter(input.astype(np.float64), delta_t, tau)
     else:
-        return cy_filters.cy_dynamic_low_pass_filter(input.astype(np.float64), delta_t, tau)
+        return cy_filters.cy_dynamic_low_pass_filter(input.astype(np.float64), delta_t, tau, method)
 
 def high_pass(input, delta_t, tau):
     return cy_filters.cy_high_pass_filter(input.astype(np.float64), delta_t, tau)