can anybody please tell me the use of 'val' function in this program.., it is not a valid function,yet the program can't be executed without using this,or by changing the function name.
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% Load original 1D signal.
clc;
clear all;
close all;
ELEVATED=[]
[fname path]=uigetfile('*.mat');
fname=strcat(path,fname);
load(fname );
z=zeros(100,1);
A=val(1,:)
v1=val(1,:)-val(1,1)
A=v1
A=A'
zc=A(1)
A=[z;A;z]
% s = A(1:1:400);
s = A;
ls = length(s);
figure(1)
plot(s);
title('Actual Signal'),grid on
[c,l]=wavedec(s,4,'db4');
ca1=appcoef(c,l,'db4',1);
ca2=appcoef(c,l,'db4',2);
ca3=appcoef(c,l,'db4',3);
ca4=appcoef(c,l,'db4',4);
figure(2)
plot(c),title('decomposed signal'),grid on
figure(3)
subplot(2,2,1)
plot(ca1),title('1st level reconstructed'),grid on
subplot(2,2,2)
plot(ca2),title('2nd level reconstructed'),grid on
subplot(2,2,3)
plot(ca3),title('3rd level reconstructed'),grid on
subplot(2,2,4)
plot(ca4),title('4th level reconstructed'),grid on
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Accepted Answer
Kye Taylor
on 19 Mar 2013
Edited: Kye Taylor
on 19 Mar 2013
The lines
[fname path]=uigetfile('*.mat');
fname=strcat(path,fname);
load(fname );
will load a .mat file into the scope of MATLAB environment. That .mat file must contain a variable whose name is val. You likely do not have the .mat file in the right place on your machine, if at all.
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More Answers (1)
Walter Roberson
on 19 Mar 2013
In the above, "val" is not a function: it is a variable being loaded from the .mat file.
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