FIR Filter 10th order with a for loop

i'm trying to filter a signal with a 10th order differential equation and for loop, with the following code, but i'm keep getting this error

Array indices must be positive integers or logical values.

Error in EOG (line 106)

new_data = data_h(k:-1:k-10);

can you please help me fix it , and tell me if it's a code or just syntax error?

TimeStamp = 0:T:59.99;
N = 10;
Fg = 1;
Wn = Fg/2; 
aTP = fir1(N,Wn);

for k = 1:numel(data_h)
     new_data = data_h(k:-1:k-10);
     Y(k) = aTP.*new_data;
end
plot(TimeStamp,data_h,TimeStamp,Y)
legend("data_h","Y")

Answer 1

[David Fletcher]

On the first iteration of your loop the indexing expression will expand to

new_data = data_h([1 0 -1 -2 -3 -4 -5 -6 -7 -8 -9])

As the error says: you can't index with zero or negative values

[Abd Alsalam Al Saell]

first of all thanks!

but one more error -_-

--> Unable to perform assignment because the indices on the left side are not compatible with the

size of the right side.

Error in EOG (line 108)

Y(k) = aTP.*new_data';

.
.
.

n = 0;
for k = 1:numel(data_h)
    n = n+11;
     new_data = data_h(k:n);
     Y(k) = aTP.*new_data';
end
.
.
.

[David Fletcher]

In this case the error is that you are trying to cram a vector into a single column. If you want to save the data from each iteration use:

Y(k,:) = aTP.*new_data';