Error using optmize (line 9) Data length must be larger than 195 samples.

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afef
afef 2017-4-11
编辑： afef 2017-4-11
Hi, i try to optimize my Matlab code so i have written this code
clc;
clear all;
close all;
load('C:\Users\del.dell-PC\pfe\base de donnée\patient sans
crise\chb01_01_edfm.mat')
deriv=val()/2.559375;
Fs=256;
t=(0:length(deriv)-1)/Fs;
d=designfilt('lowpassfir','PassbandFrequency',0.45,'StopbandFrequency',0.5,'Passba
ndRipple',3,'StopbandAttenuation',60,'DesignMethod','equiripple');
a=filtfilt(d,deriv);
But i got this error message " Error using optmize (line 9) Data length must be larger than 195 samples." How could i fix this?

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