kazuyamaa/multi-language-messages-01 huggingface dataset:
Task: Apply a digital filter (direct form II transposed)
C++: #include <vector>
#include <iostream>
using namespace std;

void Filter(const vector<float> &b, const vector<float> &a, const vector<float> &in, vector<float> &out)
{

	out.resize(0);
	out.resize(in.size());

	for(int i=0; i < in.size(); i++)
	{
		float tmp = 0.;
		int j=0;
		out[i] = 0.f;
		for(j=0; j < b.size(); j++)
		{
			if(i - j < 0) continue;
			tmp += b[j] * in[i-j];
		}

		for(j=1; j < a.size(); j++)
		{
			if(i - j < 0) continue;
			tmp -= a[j]*out[i-j];
		}
		
		tmp /= a[0];
		out[i] = tmp;
	}
}

int main()
{
	vector<float> sig = {-0.917843918645,0.141984778794,1.20536903482,0.190286794412,-0.662370894973,-1.00700480494,\
		-0.404707073677,0.800482325044,0.743500089861,1.01090520172,0.741527555207,\
		0.277841675195,0.400833448236,-0.2085993586,-0.172842103641,-0.134316096293,\
		0.0259303398477,0.490105989562,0.549391221511,0.9047198589};

	
	vector<float> a = {1.00000000, -2.77555756e-16, 3.33333333e-01, -1.85037171e-17};
	vector<float> b = {0.16666667, 0.5, 0.5, 0.16666667};
	
	vector<float> result;
	Filter(b, a, sig, result);

	for(size_t i=0;i<result.size();i++)
		cout << result[i] << ",";
	cout << endl;			

	return 0;
}

VB: Module Module1

    Function Filter(a As Double(), b As Double(), signal As Double()) As Double()
        Dim result(signal.Length - 1) As Double
        For i = 1 To signal.Length
            Dim tmp = 0.0
            For j = 1 To b.Length
                If i - j < 0 Then
                    Continue For
                End If
                tmp += b(j - 1) * signal(i - j)
            Next
            For j = 2 To a.Length
                If i - j < 0 Then
                    Continue For
                End If
                tmp -= a(j - 1) * result(i - j)
            Next
            tmp /= a(0)
            result(i - 1) = tmp
        Next
        Return result
    End Function

    Sub Main()
        Dim a() As Double = {1.0, -0.000000000000000277555756, 0.333333333, -1.85037171E-17}
        Dim b() As Double = {0.16666667, 0.5, 0.5, 0.16666667}

        Dim signal() As Double = {
            -0.917843918645, 0.141984778794, 1.20536903482, 0.190286794412,
            -0.662370894973, -1.00700480494, -0.404707073677, 0.800482325044,
            0.743500089861, 1.01090520172, 0.741527555207, 0.277841675195,
            0.400833448236, -0.2085993586, -0.172842103641, -0.134316096293,
            0.0259303398477, 0.490105989562, 0.549391221511, 0.9047198589
        }

        Dim result = Filter(a, b, signal)
        For i = 1 To result.Length
            Console.Write("{0,11:F8}", result(i - 1))
            Console.Write(If(i Mod 5 <> 0, ", ", vbNewLine))
        Next
    End Sub

End Module
Task: Apply a digital filter (direct form II transposed)
C#: using System;

namespace ApplyDigitalFilter {
    class Program {
        private static double[] Filter(double[] a, double[] b, double[] signal) {
            double[] result = new double[signal.Length];
            for (int i = 0; i < signal.Length; ++i) {
                double tmp = 0.0;
                for (int j = 0; j < b.Length; ++j) {
                    if (i - j < 0) continue;
                    tmp += b[j] * signal[i - j];
                }
                for (int j = 1; j < a.Length; ++j) {
                    if (i - j < 0) continue;
                    tmp -= a[j] * result[i - j];
                }
                tmp /= a[0];
                result[i] = tmp;
            }
            return result;
        }

        static void Main(string[] args) {
            double[] a = new double[] { 1.00000000, -2.77555756e-16, 3.33333333e-01, -1.85037171e-17 };
            double[] b = new double[] { 0.16666667, 0.5, 0.5, 0.16666667 };

            double[] signal = new double[] {
                -0.917843918645, 0.141984778794, 1.20536903482, 0.190286794412,
                -0.662370894973, -1.00700480494, -0.404707073677, 0.800482325044,
                0.743500089861, 1.01090520172, 0.741527555207, 0.277841675195,
                0.400833448236, -0.2085993586, -0.172842103641, -0.134316096293,
                0.0259303398477, 0.490105989562, 0.549391221511, 0.9047198589
            };

            double[] result = Filter(a, b, signal);
            for (int i = 0; i < result.Length; ++i) {
                Console.Write("{0,11:F8}", result[i]);
                Console.Write((i + 1) % 5 != 0 ? ", " : "\n");
            }
        }
    }
}

Go: package main

import "fmt"

type filter struct {
    b, a []float64
}

func (f filter) filter(in []float64) []float64 {
    out := make([]float64, len(in))
    s := 1. / f.a[0]
    for i := range in {
        tmp := 0.
        b := f.b
        if i+1 < len(b) {
            b = b[:i+1]
        }
        for j, bj := range b {
            tmp += bj * in[i-j]
        }
        a := f.a[1:]
        if i < len(a) {
            a = a[:i]
        }
        for j, aj := range a {
            tmp -= aj * out[i-j-1]
        }
        out[i] = tmp * s
    }
    return out
}


var bwf = filter{
    a: []float64{1.00000000, -2.77555756e-16, 3.33333333e-01, -1.85037171e-17},
    b: []float64{0.16666667, 0.5, 0.5, 0.16666667},
}

var sig = []float64{
    -0.917843918645, 0.141984778794, 1.20536903482, 0.190286794412,
    -0.662370894973, -1.00700480494, -0.404707073677, 0.800482325044,
    0.743500089861, 1.01090520172, 0.741527555207, 0.277841675195,
    0.400833448236, -0.2085993586, -0.172842103641, -0.134316096293,
    0.0259303398477, 0.490105989562, 0.549391221511, 0.9047198589,
}

func main() {
    for _, v := range bwf.filter(sig) {
        fmt.Printf("%9.6f\n", v)
    }
}
Task: Apply a digital filter (direct form II transposed)
Go: package main

import "fmt"

type filter struct {
    b, a []float64
}

func (f filter) filter(in []float64) []float64 {
    out := make([]float64, len(in))
    s := 1. / f.a[0]
    for i := range in {
        tmp := 0.
        b := f.b
        if i+1 < len(b) {
            b = b[:i+1]
        }
        for j, bj := range b {
            tmp += bj * in[i-j]
        }
        a := f.a[1:]
        if i < len(a) {
            a = a[:i]
        }
        for j, aj := range a {
            tmp -= aj * out[i-j-1]
        }
        out[i] = tmp * s
    }
    return out
}


var bwf = filter{
    a: []float64{1.00000000, -2.77555756e-16, 3.33333333e-01, -1.85037171e-17},
    b: []float64{0.16666667, 0.5, 0.5, 0.16666667},
}

var sig = []float64{
    -0.917843918645, 0.141984778794, 1.20536903482, 0.190286794412,
    -0.662370894973, -1.00700480494, -0.404707073677, 0.800482325044,
    0.743500089861, 1.01090520172, 0.741527555207, 0.277841675195,
    0.400833448236, -0.2085993586, -0.172842103641, -0.134316096293,
    0.0259303398477, 0.490105989562, 0.549391221511, 0.9047198589,
}

func main() {
    for _, v := range bwf.filter(sig) {
        fmt.Printf("%9.6f\n", v)
    }
}

Java: public class DigitalFilter {
    private static double[] filter(double[] a, double[] b, double[] signal) {
        double[] result = new double[signal.length];
        for (int i = 0; i < signal.length; ++i) {
            double tmp = 0.0;
            for (int j = 0; j < b.length; ++j) {
                if (i - j < 0) continue;
                tmp += b[j] * signal[i - j];
            }
            for (int j = 1; j < a.length; ++j) {
                if (i - j < 0) continue;
                tmp -= a[j] * result[i - j];
            }
            tmp /= a[0];
            result[i] = tmp;
        }
        return result;
    }

    public static void main(String[] args) {
        double[] a = new double[]{1.00000000, -2.77555756e-16, 3.33333333e-01, -1.85037171e-17};
        double[] b = new double[]{0.16666667, 0.5, 0.5, 0.16666667};

        double[] signal = new double[]{
            -0.917843918645, 0.141984778794, 1.20536903482, 0.190286794412,
            -0.662370894973, -1.00700480494, -0.404707073677, 0.800482325044,
            0.743500089861, 1.01090520172, 0.741527555207, 0.277841675195,
            0.400833448236, -0.2085993586, -0.172842103641, -0.134316096293,
            0.0259303398477, 0.490105989562, 0.549391221511, 0.9047198589
        };

        double[] result = filter(a, b, signal);
        for (int i = 0; i < result.length; ++i) {
            System.out.printf("% .8f", result[i]);
            System.out.print((i + 1) % 5 != 0 ? ", " : "\n");
        }
    }
}
Task: Apply a digital filter (direct form II transposed)
Java: public class DigitalFilter {
    private static double[] filter(double[] a, double[] b, double[] signal) {
        double[] result = new double[signal.length];
        for (int i = 0; i < signal.length; ++i) {
            double tmp = 0.0;
            for (int j = 0; j < b.length; ++j) {
                if (i - j < 0) continue;
                tmp += b[j] * signal[i - j];
            }
            for (int j = 1; j < a.length; ++j) {
                if (i - j < 0) continue;
                tmp -= a[j] * result[i - j];
            }
            tmp /= a[0];
            result[i] = tmp;
        }
        return result;
    }

    public static void main(String[] args) {
        double[] a = new double[]{1.00000000, -2.77555756e-16, 3.33333333e-01, -1.85037171e-17};
        double[] b = new double[]{0.16666667, 0.5, 0.5, 0.16666667};

        double[] signal = new double[]{
            -0.917843918645, 0.141984778794, 1.20536903482, 0.190286794412,
            -0.662370894973, -1.00700480494, -0.404707073677, 0.800482325044,
            0.743500089861, 1.01090520172, 0.741527555207, 0.277841675195,
            0.400833448236, -0.2085993586, -0.172842103641, -0.134316096293,
            0.0259303398477, 0.490105989562, 0.549391221511, 0.9047198589
        };

        double[] result = filter(a, b, signal);
        for (int i = 0; i < result.length; ++i) {
            System.out.printf("% .8f", result[i]);
            System.out.print((i + 1) % 5 != 0 ? ", " : "\n");
        }
    }
}

Python: 
from __future__ import print_function
from scipy import signal
import matplotlib.pyplot as plt

if __name__=="__main__":
	sig = [-0.917843918645,0.141984778794,1.20536903482,0.190286794412,-0.662370894973,-1.00700480494,
		-0.404707073677,0.800482325044,0.743500089861,1.01090520172,0.741527555207,
		0.277841675195,0.400833448236,-0.2085993586,-0.172842103641,-0.134316096293,
		0.0259303398477,0.490105989562,0.549391221511,0.9047198589]

	
	
	a = [1.00000000, -2.77555756e-16, 3.33333333e-01, -1.85037171e-17]
	b = [0.16666667, 0.5, 0.5, 0.16666667]

	
	filt = signal.lfilter(b, a, sig)
	print (filt)

	plt.plot(sig, 'b')
	plt.plot(filt, 'r--')
	plt.show()
Task: Apply a digital filter (direct form II transposed)
Java: public class DigitalFilter {
    private static double[] filter(double[] a, double[] b, double[] signal) {
        double[] result = new double[signal.length];
        for (int i = 0; i < signal.length; ++i) {
            double tmp = 0.0;
            for (int j = 0; j < b.length; ++j) {
                if (i - j < 0) continue;
                tmp += b[j] * signal[i - j];
            }
            for (int j = 1; j < a.length; ++j) {
                if (i - j < 0) continue;
                tmp -= a[j] * result[i - j];
            }
            tmp /= a[0];
            result[i] = tmp;
        }
        return result;
    }

    public static void main(String[] args) {
        double[] a = new double[]{1.00000000, -2.77555756e-16, 3.33333333e-01, -1.85037171e-17};
        double[] b = new double[]{0.16666667, 0.5, 0.5, 0.16666667};

        double[] signal = new double[]{
            -0.917843918645, 0.141984778794, 1.20536903482, 0.190286794412,
            -0.662370894973, -1.00700480494, -0.404707073677, 0.800482325044,
            0.743500089861, 1.01090520172, 0.741527555207, 0.277841675195,
            0.400833448236, -0.2085993586, -0.172842103641, -0.134316096293,
            0.0259303398477, 0.490105989562, 0.549391221511, 0.9047198589
        };

        double[] result = filter(a, b, signal);
        for (int i = 0; i < result.length; ++i) {
            System.out.printf("% .8f", result[i]);
            System.out.print((i + 1) % 5 != 0 ? ", " : "\n");
        }
    }
}

VB: Module Module1

    Function Filter(a As Double(), b As Double(), signal As Double()) As Double()
        Dim result(signal.Length - 1) As Double
        For i = 1 To signal.Length
            Dim tmp = 0.0
            For j = 1 To b.Length
                If i - j < 0 Then
                    Continue For
                End If
                tmp += b(j - 1) * signal(i - j)
            Next
            For j = 2 To a.Length
                If i - j < 0 Then
                    Continue For
                End If
                tmp -= a(j - 1) * result(i - j)
            Next
            tmp /= a(0)
            result(i - 1) = tmp
        Next
        Return result
    End Function

    Sub Main()
        Dim a() As Double = {1.0, -0.000000000000000277555756, 0.333333333, -1.85037171E-17}
        Dim b() As Double = {0.16666667, 0.5, 0.5, 0.16666667}

        Dim signal() As Double = {
            -0.917843918645, 0.141984778794, 1.20536903482, 0.190286794412,
            -0.662370894973, -1.00700480494, -0.404707073677, 0.800482325044,
            0.743500089861, 1.01090520172, 0.741527555207, 0.277841675195,
            0.400833448236, -0.2085993586, -0.172842103641, -0.134316096293,
            0.0259303398477, 0.490105989562, 0.549391221511, 0.9047198589
        }

        Dim result = Filter(a, b, signal)
        For i = 1 To result.Length
            Console.Write("{0,11:F8}", result(i - 1))
            Console.Write(If(i Mod 5 <> 0, ", ", vbNewLine))
        Next
    End Sub

End Module
Task: Apply a digital filter (direct form II transposed)
Go: package main

import "fmt"

type filter struct {
    b, a []float64
}

func (f filter) filter(in []float64) []float64 {
    out := make([]float64, len(in))
    s := 1. / f.a[0]
    for i := range in {
        tmp := 0.
        b := f.b
        if i+1 < len(b) {
            b = b[:i+1]
        }
        for j, bj := range b {
            tmp += bj * in[i-j]
        }
        a := f.a[1:]
        if i < len(a) {
            a = a[:i]
        }
        for j, aj := range a {
            tmp -= aj * out[i-j-1]
        }
        out[i] = tmp * s
    }
    return out
}


var bwf = filter{
    a: []float64{1.00000000, -2.77555756e-16, 3.33333333e-01, -1.85037171e-17},
    b: []float64{0.16666667, 0.5, 0.5, 0.16666667},
}

var sig = []float64{
    -0.917843918645, 0.141984778794, 1.20536903482, 0.190286794412,
    -0.662370894973, -1.00700480494, -0.404707073677, 0.800482325044,
    0.743500089861, 1.01090520172, 0.741527555207, 0.277841675195,
    0.400833448236, -0.2085993586, -0.172842103641, -0.134316096293,
    0.0259303398477, 0.490105989562, 0.549391221511, 0.9047198589,
}

func main() {
    for _, v := range bwf.filter(sig) {
        fmt.Printf("%9.6f\n", v)
    }
}

Python: 
from __future__ import print_function
from scipy import signal
import matplotlib.pyplot as plt

if __name__=="__main__":
	sig = [-0.917843918645,0.141984778794,1.20536903482,0.190286794412,-0.662370894973,-1.00700480494,
		-0.404707073677,0.800482325044,0.743500089861,1.01090520172,0.741527555207,
		0.277841675195,0.400833448236,-0.2085993586,-0.172842103641,-0.134316096293,
		0.0259303398477,0.490105989562,0.549391221511,0.9047198589]

	
	
	a = [1.00000000, -2.77555756e-16, 3.33333333e-01, -1.85037171e-17]
	b = [0.16666667, 0.5, 0.5, 0.16666667]

	
	filt = signal.lfilter(b, a, sig)
	print (filt)

	plt.plot(sig, 'b')
	plt.plot(filt, 'r--')
	plt.show()
Task: Apply a digital filter (direct form II transposed)
Python: 
from __future__ import print_function
from scipy import signal
import matplotlib.pyplot as plt

if __name__=="__main__":
	sig = [-0.917843918645,0.141984778794,1.20536903482,0.190286794412,-0.662370894973,-1.00700480494,
		-0.404707073677,0.800482325044,0.743500089861,1.01090520172,0.741527555207,
		0.277841675195,0.400833448236,-0.2085993586,-0.172842103641,-0.134316096293,
		0.0259303398477,0.490105989562,0.549391221511,0.9047198589]

	
	
	a = [1.00000000, -2.77555756e-16, 3.33333333e-01, -1.85037171e-17]
	b = [0.16666667, 0.5, 0.5, 0.16666667]

	
	filt = signal.lfilter(b, a, sig)
	print (filt)

	plt.plot(sig, 'b')
	plt.plot(filt, 'r--')
	plt.show()

VB: Module Module1

    Function Filter(a As Double(), b As Double(), signal As Double()) As Double()
        Dim result(signal.Length - 1) As Double
        For i = 1 To signal.Length
            Dim tmp = 0.0
            For j = 1 To b.Length
                If i - j < 0 Then
                    Continue For
                End If
                tmp += b(j - 1) * signal(i - j)
            Next
            For j = 2 To a.Length
                If i - j < 0 Then
                    Continue For
                End If
                tmp -= a(j - 1) * result(i - j)
            Next
            tmp /= a(0)
            result(i - 1) = tmp
        Next
        Return result
    End Function

    Sub Main()
        Dim a() As Double = {1.0, -0.000000000000000277555756, 0.333333333, -1.85037171E-17}
        Dim b() As Double = {0.16666667, 0.5, 0.5, 0.16666667}

        Dim signal() As Double = {
            -0.917843918645, 0.141984778794, 1.20536903482, 0.190286794412,
            -0.662370894973, -1.00700480494, -0.404707073677, 0.800482325044,
            0.743500089861, 1.01090520172, 0.741527555207, 0.277841675195,
            0.400833448236, -0.2085993586, -0.172842103641, -0.134316096293,
            0.0259303398477, 0.490105989562, 0.549391221511, 0.9047198589
        }

        Dim result = Filter(a, b, signal)
        For i = 1 To result.Length
            Console.Write("{0,11:F8}", result(i - 1))
            Console.Write(If(i Mod 5 <> 0, ", ", vbNewLine))
        Next
    End Sub

End Module
Task: Apply a digital filter (direct form II transposed)
C: #include<stdlib.h>
#include<string.h>
#include<stdio.h>

#define MAX_LEN 1000

typedef struct{
	float* values;
	int size;
}vector;

vector extractVector(char* str){
	vector coeff;
	int i=0,count = 1;
	char* token;
	
	while(str[i]!=00){
		if(str[i++]==' ')
			count++;
	}
	
	coeff.values = (float*)malloc(count*sizeof(float));
	coeff.size = count;
	
	token = strtok(str," ");
	
	i = 0;
	
	while(token!=NULL){
		coeff.values[i++] = atof(token);
		token = strtok(NULL," ");
	}
	
	return coeff;
}

vector processSignalFile(char* fileName){
	int i,j;
	float sum;
	char str[MAX_LEN];
	vector coeff1,coeff2,signal,filteredSignal;
	
	FILE* fp = fopen(fileName,"r");
	
	fgets(str,MAX_LEN,fp);
	coeff1 = extractVector(str);
	
	fgets(str,MAX_LEN,fp);
	coeff2 = extractVector(str);
	
	fgets(str,MAX_LEN,fp);
	signal = extractVector(str);

        fclose(fp);
	
	filteredSignal.values = (float*)calloc(signal.size,sizeof(float));
	filteredSignal.size = signal.size;
	
	for(i=0;i<signal.size;i++){
		sum = 0;
		
		for(j=0;j<coeff2.size;j++){
			if(i-j>=0)
				sum += coeff2.values[j]*signal.values[i-j];
		}
		
		for(j=0;j<coeff1.size;j++){
			if(i-j>=0)
				sum -= coeff1.values[j]*filteredSignal.values[i-j];
		}
		
		sum /= coeff1.values[0];
		filteredSignal.values[i] = sum;
	}
	
	return filteredSignal;
}

void printVector(vector v, char* outputFile){
	int i;
	
	if(outputFile==NULL){
		printf("[");
		for(i=0;i<v.size;i++)
			printf("%.12f, ",v.values[i]);
		printf("\b\b]");
	}
	
	else{
		FILE* fp = fopen(outputFile,"w");
		for(i=0;i<v.size-1;i++)
			fprintf(fp,"%.12f, ",v.values[i]);
		fprintf(fp,"%.12f",v.values[i]);
		fclose(fp);
	}
	
}

int main(int argC,char* argV[])
{
	char *str;
	if(argC<2||argC>3)
		printf("Usage : %s <name of signal data file and optional output file.>",argV[0]);
	else{
		if(argC!=2){
			str = (char*)malloc((strlen(argV[2]) + strlen(str) + 1)*sizeof(char));
			strcpy(str,"written to ");
		}
		printf("Filtered signal %s",(argC==2)?"is:\n":strcat(str,argV[2]));
		printVector(processSignalFile(argV[1]),argV[2]);
	}
	return 0;
}

Python: 
from __future__ import print_function
from scipy import signal
import matplotlib.pyplot as plt

if __name__=="__main__":
	sig = [-0.917843918645,0.141984778794,1.20536903482,0.190286794412,-0.662370894973,-1.00700480494,
		-0.404707073677,0.800482325044,0.743500089861,1.01090520172,0.741527555207,
		0.277841675195,0.400833448236,-0.2085993586,-0.172842103641,-0.134316096293,
		0.0259303398477,0.490105989562,0.549391221511,0.9047198589]

	
	
	a = [1.00000000, -2.77555756e-16, 3.33333333e-01, -1.85037171e-17]
	b = [0.16666667, 0.5, 0.5, 0.16666667]

	
	filt = signal.lfilter(b, a, sig)
	print (filt)

	plt.plot(sig, 'b')
	plt.plot(filt, 'r--')
	plt.show()
Task: Apply a digital filter (direct form II transposed)
C#: using System;

namespace ApplyDigitalFilter {
    class Program {
        private static double[] Filter(double[] a, double[] b, double[] signal) {
            double[] result = new double[signal.Length];
            for (int i = 0; i < signal.Length; ++i) {
                double tmp = 0.0;
                for (int j = 0; j < b.Length; ++j) {
                    if (i - j < 0) continue;
                    tmp += b[j] * signal[i - j];
                }
                for (int j = 1; j < a.Length; ++j) {
                    if (i - j < 0) continue;
                    tmp -= a[j] * result[i - j];
                }
                tmp /= a[0];
                result[i] = tmp;
            }
            return result;
        }

        static void Main(string[] args) {
            double[] a = new double[] { 1.00000000, -2.77555756e-16, 3.33333333e-01, -1.85037171e-17 };
            double[] b = new double[] { 0.16666667, 0.5, 0.5, 0.16666667 };

            double[] signal = new double[] {
                -0.917843918645, 0.141984778794, 1.20536903482, 0.190286794412,
                -0.662370894973, -1.00700480494, -0.404707073677, 0.800482325044,
                0.743500089861, 1.01090520172, 0.741527555207, 0.277841675195,
                0.400833448236, -0.2085993586, -0.172842103641, -0.134316096293,
                0.0259303398477, 0.490105989562, 0.549391221511, 0.9047198589
            };

            double[] result = Filter(a, b, signal);
            for (int i = 0; i < result.Length; ++i) {
                Console.Write("{0,11:F8}", result[i]);
                Console.Write((i + 1) % 5 != 0 ? ", " : "\n");
            }
        }
    }
}

Python: 
from __future__ import print_function
from scipy import signal
import matplotlib.pyplot as plt

if __name__=="__main__":
	sig = [-0.917843918645,0.141984778794,1.20536903482,0.190286794412,-0.662370894973,-1.00700480494,
		-0.404707073677,0.800482325044,0.743500089861,1.01090520172,0.741527555207,
		0.277841675195,0.400833448236,-0.2085993586,-0.172842103641,-0.134316096293,
		0.0259303398477,0.490105989562,0.549391221511,0.9047198589]

	
	
	a = [1.00000000, -2.77555756e-16, 3.33333333e-01, -1.85037171e-17]
	b = [0.16666667, 0.5, 0.5, 0.16666667]

	
	filt = signal.lfilter(b, a, sig)
	print (filt)

	plt.plot(sig, 'b')
	plt.plot(filt, 'r--')
	plt.show()