以时间为横坐标的MATLAB画图方法

1、Matlab画图，以时间为横坐标的画法。可以先将时间转化为小数，再显示成时间。考虑使用Matlab分两步实现：1)将时间转换为小数作图；2)将小数重新映射为时刻充当横坐标。主要需用到datenum和datetick两个函数。x=datenum(Y,M,D,H,MN,S)datenum可以提取时间数据，也即上文提到的第一步。括号中的参数依次为year,month,day,hour,minute,second本例中时间仅含小时和分钟，故将其他参数设为0。Dateaxis(tickaxis,dateform)Dateaxis将坐标采用时间标刻，也即第二步。tickaxis默认为'x'

2、,dateform为时刻格式，可为字符串或对应的数字。详见MATLAB帮助文档(或见图Dateform)。DateFormFormatDescription0Ol-Mar-199915:45:17day-month-yearhour:minute:second101-mar-1999day-month-year2D3/U1/99month/day/year3Marmonth,threeletters4Mmonth,singleletter53month603/01month/day1dayofmonth8Weddayofweek,threeletters9Wdayofweek,singlele

3、tter101999year,fourdigits1199year,twodigits12monthyear1315:45:17hour:minute:second1403:45:17PMhour:minute:secondAMorPM1515:45hour:minute1603:45PMhour:minuteAMorPM1795/03/01yearmonthday代码如下：%以时间为横坐标作图Temp=load('D:temperature.txt');Time=importdata('D:time.txt');%文本格式为时分，如13:00Hour=Time

4、(:,1);Minute=Time(:,2);interval=datenum(0,0,0,Hour,Minute,0);plot(interval,Temp,'-bd','LineWidth',2,'MarkerFaceColor','r');axis(010160);%设置坐标区间title('temp.VStime');xlabel('time');ylabel('temp/°C');x=interval;datetick('x','HH:MM

5、');%需用x作为数组变量图例为某浇注过程的温度控制曲线。t=linspace(datenum('6-26'),datenum('7-25'),6);plot(t,rand(size(t);datetick('x','mmm.dd','keepticks')StandardMATLABDateFormatDefinitionsdateform(number)dateform(string)Example0'dd-mmm-yyyyHH:MM:SS'01-Mar-200015:45:171，dd

6、-mmm-yyyy'01-Mar-20002'mm/dd/yy'03/01/003mmmMar4mM5mm03dateform(number)dateform(string)Example6'mm/dd'03/017'dd'018'ddd'Wed9'd'W10yyyy200011yy0012mmmyyMar0013'HH:MM:SS'15:45:1714'HH:MM:SSPM'3:45:17PM15'HH:MM'15:4516'HH:MMPM'

7、3:45PM17'QQ-YY'Q1-0118'QQ'Q119'dd/mm'01/0320'dd/mm/yy'01/03/0021'mmm.dd,yyyyHH:MM:SS'Mar.01,200015:45:1722'mmm.dd,yyyy'Mar.01,200023'mm/dd/yyyy'03/01/200024'dd/mm/yyyy'01/03/200025'yy/mm/dd'00/03/0126'yyyy/mm/dd'2000/03/0127'QQ-YYYY'Q1-200128mmmyyyyMar200029(ISO8601)'yyyy-mm-dd