multiple plots from array without loop

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Tommy B
Tommy B 2016-12-2
回答： Tommy B 2016-12-2
Hi all
I have an array (X) holding lets say 20 cycles of data. I would like to plot the entire 20 cycles as a dashed line plot, and then markup (with a solid line) specific segments of the graph, the start and end indexes are in two different vectors S1 and S2. Would it be possible to do something like this:
plot(X,'k--');
hold on;
plot(X([S1:S2]),'r');
instead of using a loop as:
plot(X,'k--');
for i=1:length(S1)
plot(X(S1(i):S2(i),r,)
end
The only reason is I would like to avoid loops in my code, as I am plotting several graph segments within my code, and then having 30 for loops does not look good :)
Best, Tommy
  2 个评论
KSSV
KSSV 2016-12-2
This will work:
plot(X,'k--');
hold on;
plot(X([S1:S2]),'r');
You can try on your own...why doubt?
Tommy B
Tommy B 2016-12-2
编辑：Tommy B 2016-12-2
Hi Well because I did try, and it did not work :/
X =[1 2 3 4 5 6 7 8 9 10];
S1=[1 4 9];
S2=[2 5 10];
plot(X,'k--');
hold on;
plot(X([S1:S2]),'r');
I want this to mark the section X= 1-2 & 4-5 & 9-10 with a red line, the rest should be dashed. With the above code it only marks the first segment in red.
Best, Tommy

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采纳的回答

KSSV
KSSV 2016-12-2
编辑：KSSV 2016-12-2
I understand now...You may follow some thing like this:
X =[1 2 3 4 5 6 7 8 9 10];
S1=[1 4 9];
S2=[2 5 10];
plot(X,'k--');
hold on;
Y = NaN(size(X)) ;
Y([S1 S2]) = X([S1 S2]) ;
plot(Y,'r');
Introduce NaN's at the place you want to skip...plot will not show NaN's.

更多回答（1 个）

Tommy B
Tommy B 2016-12-2
Yes, perfect! Thanks a lot!
Have a nice weekend.
Best, Tommy

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