How to pick specific points and mark them on a plot?

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Marian
Marian 2013-10-15
评论： Marian 2013-10-16
Hi, I currently have an array that is finding temperature differences between two sets of quality controlled data. I have no problem finding these temperature differences and plotting them, but I'd like to know if there is a way for me to mark where there is at least a one degree difference? so:
%temp is time series object with temperature differences
plot(temp)
for i=1:length(temp)
if temp(i)>1 temp(i)<-1
((mark this on the plot))
end
end
Thanks!

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回答（1 个）

Vivek Selvam
Vivek Selvam 2013-10-15
Hi Marian
Add this snippet:
hold on;
plot(i,temp(i),'*')
  1 个评论
Marian
Marian 2013-10-16
It appears to be plotting the timeseries and then plotting the '*' further down the axis, instead of on top of the time series. Is there any way I can "get" the elements of the timeseries itself? In other words, instead of using temp, could I use my time series object for temp, ts5, in this for loop? It tells me I cannot just use ts5(i), as it is an undefined function for time series.

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