Plot like a "scope" block
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Hi, my question :
Can I use plot to watch a curve like a scope block do when you put 'scope parameters' sampling to 'Sample time' and no to 'decimal' ?
Thanks !
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Paulo Silva
2011-5-13
Answer edited, looking better at the scope it looks like it does something like the ZOH block does, maybe this code can help you:
Ts1=0.01; %sampling time in seconds of the measured signal
%if you don't know Ts1 do Ts1=t(2)-t(1)
t=0:Ts1:10;
f=@(x)sin(x); %function that generates the signal
s=f(t);
Ts=0.1; %sampling time in seconds of your sampling (Ts must be bigger than Ts1)
sss=cell2mat(arrayfun(@(x)repmat(s(x),1,fix(Ts/Ts1)),1:fix(Ts/Ts1):numel(s),'uni',false));
clf
hold on
plot(t,s)
plot(t,sss(1:numel(t)),'r')
legend('signal',['signal sampled at ' num2str(Ts) ' seconds'])
Example that I wrote but it doesn't do the same as the scope:
t=0:0.01:10;
f=@(x)sin(x); %function that generates the signal
s=f(t);
Ts=1; %sampling time in seconds
tsamp=0:Ts:10;
ssamp=f(tsamp);
clf
hold on
plot(t,s)
plot(tsamp,ssamp,'r')
legend('signal',['signal sampled at ' num2str(Ts) ' seconds'])
Sébastien Malengé
2011-5-16
0 个投票
1 个评论
Arnaud Miege
2011-5-16
The function is just there to generate the data, you can ignore it.
Arnaud Miege
2011-5-16
0 个投票
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2011-5-13
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