Graph population data for the 20th Century taken from the 1990 US census and labelx-axis ticks with 2-digit years.

Create time data by decade.

t = (1900:10:1990)';

Enter total population counts for the USA.

p = [75.995 91.972 105.711 123.203 131.669...150.697 179.323 203.212 226.505 249.633]';

Convert years to serial date numbers using thedatenumfunction, and then create a bar graph of the data.

figure bar(datenum(t,1,1),p)

Replacex-axis ticks with 2-digit years. The numeric identifier11corresponds to the predefined MATLAB® date format'yy'.

dateFormat = 11; datetick('x',dateFormat)

Plot traffic count data against date ticks for hours of the day showing AM and PM.

获得流量统计数据。

loadcount.dat

Create arrays for an arbitrary date, for example, April 18, 1995.

n = length(count); year = repmat(1995,1,n); month = repmat(4,1,n); day = repmat(18,1,n);

Create arrays for each of 24 hours.

hour = 1:n; minutes = zeros(1,n);

Get the serial date numbers for the date arrays.

sdate = datenum(year,month,day,hour,minutes,minutes);

Plot a 3-D bar graph of the traffic data against the serial date numbers.

bar3(sdate,count)

Label the tick lines of the graph'sy-axis with the hours of the day.

datetick('y','HHPM')

Select a starting date.

startDate = datenum('02-01-1962');

Select an ending date.

endDate = datenum('11-15-2012');

Create a variable,xdata, that corresponds to the number of years between the start and end dates.

xData = linspace(startDate,endDate,50);

Plot random data.

figure stem(xData,rand(1,50))

Label thex-axis with 4-digit years, preserving thex-axis limits by using the'keeplimits'option.

datetick('x','yyyy','keeplimits')

Select a starting date.

startDate = datenum('01-01-2009');

Select an ending date.

endDate = datenum('12-31-2009');

Create a variable,xdata, that corresponds to the number of months between the start and end dates.

xData = linspace(startDate,endDate,12);

Plot random data.

figure stairs(xData,rand(1,12))

Set the number ofXTicksto the number of points inxData.

ax = gca; ax.XTick = xData;

Label thex-axis with month names, preserving the total number of ticks by using the'keepticks'option.

datetick('x','mmm','keepticks')