在Matlab中创建和绘制时间序列数据

Question

I have a (1x700) vector x for which I would like to create and plot a time series object in Matlab. Each observation corresponds to one month, and the first observation belongs to January 1960. I tried the following:

state1 = timeseries(x,1:size(x,2));

state1.Name = 'Test';
state1.TimeInfo.Units = 'months';
state1.TimeInfo.StartDate = 'Jan-1960';     % Set start date.
state1.TimeInfo.Format = 'yy';         % Set format for display on x-axis.
state1.Time = state1.time - state1.time(1);      % Express time relative to the start date.

plot(state1);

However, I still see numbers on the x-axis instead of years. Could anyone please help? Thanks in advance!

Answer 1

Create random data. 1/12 corresponds to the fraction of a year that each month represents.

x = 1960:1/12:1970;
y = rand(1,121);

Then plot the x and y axes data using plot .

plot( x, y )

Then set the tick as follows for a decade per year. 1960:1970 will generate [1960 1961 ...] each corresponding to the tick's year.

set( gca, 'XTick', 1960:1970 );

Here is the output plot.

Doing 1 year intervals get VERY MESSY with lots of data. So solutions include doing a larger interval or setting your ticks to display vertically instead of horizontally. This code below shows how to set 5 year intervals instead.

set( gca, 'XTick', 1960:5:2010 );