|Jan31-13, 08:39 PM||#1|
Concatinating signals on Matlab
Hiiiiii Everyone ,
It is My First Post ....And I will be Very pleased if You helped me find a solution to my problem .
well... It is a Matlab code &
I have different type of signals (impulse ,Ramp, sinusoidal,Dc ,exponintial )
& the type of signal is determined by the user ( the user enter a number from 1 to 5) to determine the signal & the user can have multiple selection ..& the user tells me how many time he want to select signals
But The Problem i don't Know how to concatenate the signal .. I tried to make it like this
but an error keeps bothering me
??? In an assignment A(I) = B, the number of elements in B and
I must be the same.
please any one help me..
|Jan31-13, 09:38 PM||#2|
So if you are storing the possible signals in vectors m1 m2 etc, and the user constructed vector is a, then, at each selection, you are doing a=[a,m1] (if type 1 was selected).
I think your error means that you have made a mistake in your assignments to do with the vector size. Check that you are concatenating to the right place with the correct orientation.
But I suspect it is the y(choice) part ... matlab would see that as an assignment of form A(I)=B you see?
7> m=magic(4) m = 16 2 3 13 5 11 10 8 9 7 6 12 4 14 15 1 8> a=m(1,:) a = 16 2 3 13 9> a=[a,m(4,:)] a = 16 2 3 13 4 14 15 1 10> a=[a,m(:,3)] error: number of rows must match (4 != 1) near line 10, column 6 10> a=[a;m(3,:)] error: number of columns must match (4 != 8)
|Feb1-13, 01:11 PM||#3|
Thanks Monsieur simone For Your Help :)
But That wasnot the point that i was asking about .. You R Right you have to see the code to be able to see the problem
c=input('enter the number of break point: ');
m(1,k)=input('enter positions of break point:');
p=[-5 m 3]; % The signal start at -5 & end at 3 & m is the position of the break
for k = 1:c+1
t=linspace(p(1,k),p(1,k+1),(p(1,k+1)-p(1,k))*100); % the frequency =100
choice=menu('Choose a type','y(1)','y(2)','y(3)','y(4)','y(5)');
% Here i want to conatenate all the choosen signals & Plot it With T
% But i can't Write the proper code of concatination
|Feb1-13, 07:43 PM||#4|
Concatinating signals on Matlab
c=input('enter the number of break point: ');... you have not defined k - change the n to a k or the k to an n.
With this change, the output looks like this:
48> sig enter the number of break point: 3 enter positions of break point:0.1 enter positions of break point:0.2 enter positions of break point:2 Choose a type [ 1] y(1) [ 2] y(2) [ 3] y(3) [ 4] y(4) [ 5] y(5) pick a number, any number: 1 error: A(I) = X: X must have the same size as I error: called from: error: /home/simon/sig.m at line 15, column 5
if choice==1consider: what does "y(1)" mean to matlab?
- what do you y to look like?
if you want y to be a row vector containing the signal, then you can build it as you go.
y=[y,[4 zeros(1,(g-1))] ];
That gets rid of the error but there are other problems.
Work through your loops by hand - pick c=1 and choose 0 so that p=[-5,0,3] and see what happens. Make sure it's what you want to happen.
What happens if the user chooses break point positions out of order? i.e. if c=2, and the first point is 2 and the second is -1?
What happens if the user chooses non-integer break point positions?
I'm guessing you'll work out how to build a horizontal axis later?
[*] Shouldn't that be by Monsieur (Simon) Dupont for French? IIRC: "Simone" is the feminine spelling in French as it is in English so you are kinda implying that you think I'm a girl? Mind you - if I'm an honorary woman then I get to be "right" don't I so... no complaints there ;)
It is masculine in Italian though - for "Signor (Simone) Ponte" or something(?)
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