MATLAB: I have an ecg signal of length 304 ,but while plotting i only want to plot the signal till 300..can anybody help me about how to do it

signal processingwave analysis

Actually i am getting unexpected result at the end of the sample so that is why i wantto decrese the length

ecg = rand(1, 304);
plot(ecg(1:300));

doc fft %the documentation example is very good

Very simple example how to add noise to a wave:

t=0:0.1:10; %from 0 to 10 seconds, sampling 0.1 seconds
y=sin(t); %measured amplitude
n=0.1*rand(1,numel(t)); %noise to add
plot(x,y+n)

hi,