Mark max value and min value with red circle

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Mathias Pettersen
Mathias Pettersen 2019-9-23
评论： dpb 2021-5-17
Hey I need to mark max and min value of this graph with a red circle.
f = importdata("croc.txt");
deviation = f.data(:,1);
dates = f.textdata;
x = datenum(dates, "yyyy/mm");
y = deviation;
figure(1);
plot(x,y)
datetick('x','yyyy')
How can I then mark min and max peak with red circle?

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dpb
dpb 2019-9-23
编辑：dpb 2019-9-23
[~,imx]=max(y);
[~,imn]=min(y);
hold on
plot(x([imn;imx]),y([imn;imx]),'or')
or as I was going to do originally as noted in comment:
ix=[imn;imx];
plot(x(ix),y(ix),'or')
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PAVARNA TA
PAVARNA TA 2021-5-17
how to mark only the minimum or the maximum point?

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