MatLab is plotting only points?

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John Nosh
John Nosh 2017-9-29
评论： Jan 2017-9-30
I imported an excel file into matlab and tried to plot it. But the problem is I simply get the individual points they aren't connected. How would I go about and connect those points? Thank you for helping.
Code:
[Data]=xlsread('File.xlsx');
P=Data(:,2);
n=Data(:,3);
eta=Data(:,4);
StartIndex=[1;1+find(abs(diff(Data(:,1))))];
EndIndex=[StartIndex(2:end)-1;size(Data,1)];
for i=1:length(StartIndex)
n1=n(StartIndex(i):EndIndex(i));
P1=P(StartIndex(i):EndIndex(i));
plot(n1,P1,'-o')
hold on
end
  1 个评论
Jan
Jan 2017-9-30
I have edited your question and used the "{} Code" button to improve the readability of your code.
Note that the abs() can be omitted in find(abs(diff())).

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采纳的回答

Jan
Jan 2017-9-30
What about:
Data = xlsread('File.xlsx');
P = Data(:,2);
n = Data(:,3);
Index = [1; 1+find(diff(Data(:,1)))];
plot(n, p);
hold on
plot(n(Index), P(index), 'o');
  2 个评论
John Nosh
John Nosh 2017-9-30
Works thank you so much. I think I was going nuts for not finding the solution.
Jan
Jan 2017-9-30
Going to the forum is more convenient than going nuts. :-)

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