How do I limit plotting the values from a row variable say time?

I want to make a plot with the time for 41665 values only. How do I achieve this?

figure('position',[50 100 1400 400])
pcolor(datenum(time),rng,zh)
datetick('x')
shading flat

Answer 1

[KSSV]

Z = peaks(30) ;
x = datetime(2022,01,01):datetime(2022,01,30) ;  % datetime class 
y = 1:30 ;

pcolor(x,y,Z)
shading flat

[Tunde Adubi]

Hey, Thanks but I'm still having errors seen below.

Numeric input data must be a matrix with three or six columns, or else three, six, or seven separate numeric
arrays. You can also create datetimes from a single numeric array using the 'ConvertFrom' parameter.

How can I correct that so the X-axis of the plot should be limited at '27-Dec-2021 00:00:00'?

time1  = ncread(fname,'time');
    units  = ncreadatt(fname,'time','units');
    year = str2num(units(15:18)); month = str2num(units(20:21)); 
    day  = str2num(units(23:24)); hr    = str2num(units(26:27)); 
    minutes = str2num(units(29:30));
test_time = datetime(year,month,day,hr,minutes,time1);
time = [time;test_time];
figure('position',[50 100 1400 400])
xtime= datetime(26:12:2021: 00:00:00):datetime(27:12:2021 : 00:00:00);
pcolor(xtime,rng,zh)

[KSSV]

What are dimensions of xtime, rng and zh?

[Tunde Adubi]

The time variable (x-axis) should be 41665x1; The rng is the Y-axis 600 x1(double); zh has no dimension as its a 2D plot, see attached figure. In the attachment, The vertical space on the RHS with an extra hour (00:00 to 01:00) is to be eliminated from time.