how to connect points where the interval has no values?

Dear Sir,

May I know how to connect points together where the interval between any two points have no values?

ie my data set: test1 =

1 2

2

3

4 4

my program: plot(test1(:,1), test1(:,2))

the results: only points are plotted but they are not joined. I tried interpolation, but cant because the interval is NaN. How do we join the points to form continuous line?

thanks for your kind help.

Answer 1

[Matt Fig]

Is test a cell array? What you show is not possible for a regular array. Please elaborate.

Answer 2

[Cheerful]

Dear Mr Matt,

test1 is a data set. we can imagine the first column as x-axis and second column as y-axis. in the first column, we have [1 2 3 4] and second column as having a value that corresponds to a x-value. ie 2 correspond to 1st element of x-axis and 4 correspond to 4th element of x-axis.

yes i did not input them as a regular array directly. I had an excel sheet with the above setting and read them off to a variable in Matlab.

Why i do this is because to model events happening at intervals. I have another set of data(observations) that occurs at all discrete times. Hence I would like to see a graph with the observations on top and events below. So why i link the events up is to see the trend clearly and how it affects the observations

hope its clearer now. its a tough one.

thank you for your help.