plot subset of data

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michael
michael 2020-5-11
回答： KSSV 2020-5-11
Hello,
(I'm using some old matlab :( )
I have a vector with 1000 values. From this values, I'd like to filter based on some value and then plot it as 'events'
For example, I have some numbers between 0 and 2*pi. I'd like to filter all values greater than 4 and plot them with x base 1:1000.
I'd be glad to have some clues.

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KSSV
KSSV 2020-5-11
Let x,y be your values. Where x = 1:1000 and y lies in [0, 2*pi] ;
idx = y>4 ; % get indices of y which are greater than four
plot(x(idx),y(idx)) % plot

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