# Plotting data as a function of time

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jacob Mitch am 13 Okt. 2019
Kommentiert: jacob Mitch am 14 Okt. 2019
I'm just trying to understand plotting prices as a function of time, if I have price data of prices in a column, say x=[1;2;3;4;5;6;7;8;9;13;14;15] and creating a time axis of integers from 1 to the number of days so 1:length of the first colum am I correcting in the definition of plotting the prices as a function of time by.
numberofdays=size(x,1)
plot(1:numberdays,x(:,1)) %equivalent to plot(t,y) where x(:,1) are the first column price values
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Stephan am 13 Okt. 2019
you are right, whats the question?
jacob Mitch am 14 Okt. 2019
Bearbeitet: jacob Mitch am 14 Okt. 2019
The question says to create an array containing the integers from 1 to numberofdays and then use this as a time axis. The question then says plot prices as a function of time. I got prices from a table of data, as the first column x(:,1). Thanks again

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### Akzeptierte Antwort

dpb am 13 Okt. 2019
For the given description, yes. BUT, you should probably create your date vector as one of the datetime or duration class instead as just integers if there is anything excepting just arbitrary day sequence number in the time series. Most often, one only has economic data that is associated with an actual date.
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jacob Mitch am 14 Okt. 2019
The question says to create an array containing the integers from 1 to numberofdays and then use this as a time axis. The question then says plot prices as a function of time. I got prices from a table of data, as the first column x(:,1). Thanks again

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