Extracting data from a given figure?

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Cladio Andrea il 21 Feb 2015
Commentato: Geoff Hayes il 21 Feb 2015
Hello everyone, i have a figure as you can see, and what i want is to get x and y coordinates but as you can see i have a data at decimal points what i want to do is to get data from this figure and insert into a 3600x1 array, lets say if i have a data at 258.45 second then i want to have it at 259th row of the matrix, and the seconds that there is no data will be zero inside the matrix, can anyone help me please?
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Geoff Hayes il 21 Feb 2015
Cladio - what is the data that you used to generate the above function? Consider using ceil to round up your seconds to the nearest integer so that you can populate your 3600x1 matrix. For example, if
x = [0.1 12.34 45.32 258.45 1300.2 2501.9 3598.45];
y = [208 231 33 233 162 25 72];
data = zeros(3600,1);
then to populate data with x and y, you could try
data(ceil(x)) = y;
and you will observe that data(259) is 233. The above code assumes that no two packets arrive within the same second (else one will override the other in data).
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Cladio Andrea il 21 Feb 2015
thank you so much!but i am having one error. Subscript indices must either be real positive integers or logicals. because you know for some cases i have '0' inside the x matrix lets say [0,0,0,34.76,0....] and data does not have row 0 do you know how i can fix that? Thank you so much!!!
Geoff Hayes il 21 Feb 2015
Do the zeros correspond to data (packet sizes) that are valid, or should they be ignored?

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