How to set a label on the xaxis

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jjlivestrong
jjlivestrong 2012 年 9 月 27 日
I am trying to set a specific xlabel on a plot using set commands.
The graph plots wind data versus time of day and it goes like this:
TODAY = datenum([2012 9 21 7 0 0]);
REST_OF_TODAY = datenum([2012 9 21 17 0 0]);
y_max1 = max([5,10]);
y_min1 = min([5,10]);
y_max2 = max([6 11]);
y_min2 = min([6 11]);
plot(TODAY,y_max1,'-- ys','LineWidth',2,'MarkerEdgeColor','r','MarkerFaceColor','g','MarkerSize',10) hold on
plot(TODAY,y_min1,'--ys','LineWidth',2,'MarkerEdgeColor','b','MarkerFaceColor','y','MarkerSize',10)
plot(REST_OF_TODAY,y_max2,'--ys','LineWidth',2,'MarkerEdgeColor','r','MarkerFaceColor','g','MarkerSize',10) plot(REST_OF_TODAY,y_min2,'--ys','LineWidth',2,'MarkerEdgeColor','b','MarkerFaceColor','y','MarkerSize',10) set(gca,'XTick',TODAY:REST_OF_TODAY)
set(gca,'XTickLabel',{'Today','Rest of today'})
datetick('x',1) title('Wind(Knots) versus Time (dd-mmmm-yyyy)','fontsize',12,'fontweight','b');
xlabel('Time (dd-mmmm-yyyy)','fontweight','b');
ylabel('Wind (Knots)','fontweight','b');
grid minor
and I want to replace the datetick format number '1' by TODAY and REST OF TODAY as shown in this code:
t0 = 1
t1 = datenum([2012 9 21 7 0 0]) % 7 am
today t2 = datenum([2012 9 21 17 0 0]) % 5 pm
x = linspace(t1,t2); % generates a row vector y of 100 points linearly spaced between and including t1 and t2.
plot(x,sin(sqrt(x-t0)*pi)) set(gca,'XTick',[t1,floor(t1)+0.5],'XTickLabel',{'Today','Rest of today'})
grid minor
Can you please help?
  2 件のコメント
Star Strider
Star Strider 2012 年 9 月 27 日
編集済み: Star Strider 2012 年 9 月 27 日
I do not fully understand what you want to do.
To start, I suggest deleting this line:
datetick('x',1) title('Wind(Knots) versus Time (dd-mmmm-yyyy)','fontsize',12,'fontweight','b');
and replacing it with this line:
title('Wind(Knots) versus Time (dd-mmmm-yyyy)','fontsize',12,'fontweight','b')
and run your code again. Does your code now do what you want it to do?
jjlivestrong
jjlivestrong 2012 年 9 月 27 日
Yes. That it's exactly what I want to do, but Instead the code you are suggesting only outputs the name TODAY below the first points. I want to also display REST OF TODAY on the other points.

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採用された回答

Star Strider
Star Strider 2012 年 9 月 27 日
You only have two sets of points, so this is the best I can do:
TODAY = datenum([2012 9 21 7 0 0]);
REST_OF_TODAY = datenum([2012 9 21 17 0 0]);
y_max1 = max([5,10]);
y_min1 = min([5,10]);
y_max2 = max([6 11]);
y_min2 = min([6 11]);
plot(TODAY,y_max1,'-- ys','LineWidth',2,'MarkerEdgeColor','r','MarkerFaceColor','g','MarkerSize',10)
hold on
plot(TODAY,y_min1,'--ys','LineWidth',2,'MarkerEdgeColor','b','MarkerFaceColor','y','MarkerSize',10)
plot(REST_OF_TODAY,y_max2,'--ys','LineWidth',2,'MarkerEdgeColor','r','MarkerFaceColor','g','MarkerSize',10)
plot(REST_OF_TODAY,y_min2,'--ys','LineWidth',2,'MarkerEdgeColor','b','MarkerFaceColor','y','MarkerSize',10)
set(gca,'XTick',TODAY:REST_OF_TODAY)
set(gca,'XTickLabel',{'Today','Rest of today'})
title('Wind(Knots) versus Time (dd-mmmm-yyyy)','fontsize',12,'fontweight','b')
xlabel('Time (dd-mmmm-yyyy)','fontweight','b');
ylabel('Wind (Knots)','fontweight','b');
grid minor
t0 = 1
t1 = datenum([2012 9 21 7 0 0]) % 7 am today
t2 = datenum([2012 9 21 17 0 0]) % 5 pm
x = linspace(t1,t2); % generates a row vector y of 100 points linearly spaced between and including t1 and t2.
plot(x,sin(sqrt(x-t0)*pi))
% set(gca,'XTick',[t1,floor(t1)+0.5],'XTickLabel',{'Today','Rest of today'})
set(gca,'XTick',[t1 t2],'XTickLabel',{'Today','Rest of today'})
grid minor
Is that what you want? (I commented the line I replaced, and put the corrected line below it. I also included my earlier corrections to your code.)
  6 件のコメント
Moon Datta
Moon Datta 2012 年 11 月 15 日
Thank you Sir. It has helped me also..........
Star Strider
Star Strider 2012 年 11 月 15 日
Again, my pleasure!

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