def update_coef(learning_rate,error,w,data):
            ip = 1
            for i in range(len(data)-1):
                if ip==1:                            ## for first iteration to update the interept term
                    w[0] = w[0]-learning_rate*error
                    ip=ip+1
                vx = learning_rate * error * data[i]
                w[i + 1] = w[i + 1] - vx  # updating rest of the coefficients
            return w