Error : Expression or statement is incorrect--possibly unbalanced (, {, or [.

i have a multichannel EEG and i try to filter all the channel but i got this error " Expression or statement is incorrect--possibly unbalanced (, {, or [." and i don't know to correct it

clc;
clear all;
close all;
load('C:\Users\del.dell-PC\pfe\base de donnée\patient sans crise\chb01_01_edfm.mat')
deriv1=(val(1,:)-0)/2.559375;
Fs=256;
t=(0:length(deriv1)-1)/Fs; %valeur du temps de tout échantillon%
figure (1),plot(t,deriv1)
legend('FP1-F7');
d1=designfilt('lowpassfir','PassbandFrequency',0.15,'StopbandFrequency',0.2,'PassbandRipple',3,'StopbandAttenuation',60,'DesignMethod','equiripple');
a = filtfilt(d1,(t,deriv1));
figure (2),plot(a,'r');
legend(' FP1-F7 Filtré');

[per isakson]

The box in the upper right corner of the Matlab editor window displays red, which is caused by this line

a = filtfilt(d1,(t,deriv1));

[Walter Roberson]

In other words, change the line to

a = filtfilt(d1,t,deriv1);

[Jan]

@per and Walter: You have solved the problem. Let the OP accept an answer to mark the thread as solved.

[majed samir]

Error : Expression or statement is incorrect--possibly unbalanced (, {, or [. in statement [~, SortOrder]=sort( bee.Cost);

how solution?

% Empty Bee Structure
empty_bee.Position=[];
empty_bee.Cost=[];

% Initialize Bees Array
bee=repmat(empty_bee,nScoutBee,1);

% Create New Solutions
for i=1:nScoutBee
    bee(i).Position=unifrnd(VarMin,VarMax,VarSize);
    bee(i).Cost=CostFunction(bee(i).Position);
end

% Sort
[~,  SortOrder]=sort( bee.Cost);
bee=bee(SortOrder);

[Walter Roberson]

majed samir:

I suspect you are using a release before R2009b. You should use something like

[ThisVariableWillNotBeUsed, SortOrder] = sort([bee.Cost]);
clear ThisVariableWillNotBeUsed
bee = bee(SortOrder);

Note that even for R2009b and later, the code was incorrect. For later releases the line should have been

[~, SortOrder] = sort([bee.Cost]);
bee = bee(SortOrder);