Line plotting

3 次查看（过去 30 天）
Andy
Andy 2011-11-3
for yy = 1:length(overlap_peaks2)
x=overlap_peaks2(yy);
y=1:200000:1000000;
hold on;
plot(overlap_peaks2(yy),y, '-r')
end
length(overlap_peaks2) is just equal to 1
my question is why is it when i plot it, it shows up as seperate dots, how do i make it connect into a line? i am just tryign to plot x=589

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采纳的回答

Walter Roberson
Walter Roberson 2011-11-3
for yy = 1:length(overlap_peaks2)
x=overlap_peaks2(yy);
y=1:200000:1000000;
hold on;
plot(repmat(x,1,length(y)),y, '-r')
end
By the way, you should also consider
for yy = 1:length(overlap_peaks2)
x=overlap_peaks2(yy);
hold on;
plot([x x],[1 1000000], '-r')
end

更多回答（1 个）

Fangjun Jiang
Fangjun Jiang 2011-11-3
If "length(overlap_peaks2) is just equal to 1", then in your code, yy will be 1 and the loop runs once. What is the length of overlap_peaks2(yy)? If it's a scalar, you are just going to get 5 dots.
Check your code again.
  2 个评论
Andy
Andy 2011-11-3
in this case overlap_peaks2 is just size of 1, but in some other cases it will be longer. How do i connect those dots with a line?
Fangjun Jiang
Fangjun Jiang 2011-11-3
Usually x and y are two vectors with the same size in plot(x,y), such as plot(1:10,sin(1:10)). plot(1,1:10,'-r') or plot(1:10,1,'-r') still generates a plot but only shows 10 points. Even if you can use plot(repmat(1,1,10),1:10,'-r') to make it draw the line, I am not sure what the line means to you.

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