Plotting Time Series
Plotting time series from a vector
Let's start by loading time series data from a csv file:>> timeseries = readtable('timeseries.csv')
[timeseries:255x4 table]
>> timeseries(1:3)# % displaying 3 first rows
Date Amazon Google Apple
15/06/2015 22.42 22.88 21.5
12/06/2015 22.58 20.75 21.48
11/06/2015 22.98 20.86 21.19
In order to plot time series the x-axis coordinates must use mathlayer® date numbers. Setting xAxisFormat option to 'date' allows to plot time series by converting the date number into a date string displayed on the x-axis.
The date format can be specified through xAxisDateFormat option:
>> o = struct %initializing options struct
o.xAxisFormat = 'date'% we want to plot time series
o.xAxisDateFormat = '%d-%b-%Y'% specifying the date format here
o.xAxisRotate = 25 %rotating x-axis labels for clarity
o.markerSize = 2 plot(datenum(timeseries.Date, 'dd/mm/yyyy'), timeseries.Amazon, o)
Plotting time series using table input
The following example shows how to plot multiple time series using a table object as input argument:>> timeseries.Date = datenum(timeseries.Date,'dd/mm/yyyy') o = struct% initializing options struct
o.xAxisFormat = 'date'% we want to plot time series
o.xAxisDateFormat = '%d-%b-%Y'% specifying the date format here
o.xAxisRotate = 25% rotating x-axis labels for clarity
plot(timeseries, o)