How to load many .txt files in loop?

i am very new to matlab, please help me.

A). For my project i need to load 91 .txt files into loop to perform wavelet decomposition at level 4. Each .txt file consists of 1 column of data and 4097 rows. I have used the following code but don't know how to modify it.

load ??; (I dont know how to load 91 .txt files in loop)
s = ??(1:4097);
l_s = length(s); 
[cA4,cD4] = dwt(s,'db1');
A4 = upcoef('a',cA4,'db1',4,l_s); (Should i also change the db1 to db4?)
D4 = upcoef('d',cD4,'db1',4,l_s); (Should i also change the db1 to db4?)
plot(A4);

also i need to plot all the Approximations of 91 .txt files in 1 window of the 4th level of decomposition only. please help me :)

[e-mail] if anyone wants to help me further...... thank you soo much :)

Answer 1

[dpb]

See the FAQ at <How_can_I_process_a_sequence_of_files?> For a set of files with a common extension, the dir solution shown is my recommendation...