How to convert XLim day data to monthly?

Hi there, as you can see below I've got monthly data plotted by it is displayed along the x-axis as days. How do you change it so it is not 1:366 (days) but 1:12 (months). Thank

Here is my script for these plots:

allt=[data2009.t data2010.t data2011.t data2012.t ...

data2013.t data2014.t data2015.t data2016.t];

allT=[data2009.T data2010.T data2011.T data2012.T ...

data2013.T data2014.T data2015.T data2016.T];

allS=[data2009.S data2010.S data2011.S data2012.S data2013.S data2014.S data2015.S data2016.S];

allTu=[data2009.Tu data2010.Tu data2011.Tu data2012.Tu data2013.Tu data2014.Tu data2015.Tu data2016.Tu];

for I=1:12

monthstart(I) = day(datetime(2009,I,1),'dayofyear');

end

monthstart (13) = 366;

for I=1:12

tmpT = allT(find (allt>monthstart(I) &allt<monthstart(I+1)));

tmpT(isnan(tmpT))=[];

meanT(I)=mean(tmpT);

stdT(I)=std(tmpT);

end

for I=1:12

tmpT = data2016.T(find (data2016.t>monthstart(I) & data2016.t<monthstart(I+1)));

tmpT(isnan(tmpT))=[];

meanT2016(I)=mean(tmpT);

stdT2016(I)=std(tmpT);

end

for I=1:12

tmpS = allS(find (allt>monthstart(I) &allt<monthstart(I+1)));

tmpS(isnan(tmpS))=[];

meanS(I)=mean(tmpS);

stdS(I)=std(tmpS);

end

for I=1:12

tmpS = data2016.S(find (data2016.t>monthstart(I) & data2016.t<monthstart(I+1)));

tmpS(isnan(tmpS))=[];

meanS2016(I)=mean(tmpS);

stdS2016(I)=std(tmpS);

end

for I=1:12

tmpTu = allTu(find (allt>monthstart(I) &allt<monthstart(I+1)));

tmpTu(isnan(tmpTu))=[];

meanTu(I)=mean(tmpTu);

stdTu(I)=std(tmpTu);

end

for I=1:12

tmpTu = data2016.Tu(find (data2016.t>monthstart(I) & data2016.t<monthstart(I+1)));

tmpTu(isnan(tmpTu))=[];

meanTu2016(I)=mean(tmpTu);

stdTu2016(I)=std(tmpTu);

end

figure(2)

%clf

subplot (3,1,1)

plot(monthstart(1:12),meanT,'b-', 'LineWidth', 2)

hold on

plot(monthstart(1:12),meanT2016,'r-', 'LineWidth', 2)

plot(monthstart(1:12),meanT+stdT,'b--')

plot(monthstart(1:12),meanT-stdT,'b--')

plot(monthstart(1:12),meanT2016+stdT2016,'r--')

plot(monthstart(1:12),meanT2016-stdT,'r--')

xlabel('Day Of Year')

ylabel ('SST (^oC)')

title ('L4 monthly Mean Sea Surface Temperature')

set(gca,'XLim',[1 366])

legend('2009-2015','2016')

subplot (3,1,2)

plot(monthstart(1:12),meanS,'b-', 'LineWidth', 2)

hold on

plot(monthstart(1:12),meanS2016,'r-', 'LineWidth', 2)

plot(monthstart(1:12),meanS+stdS,'b--')

plot(monthstart(1:12),meanS-stdS,'b--')

plot(monthstart(1:12),meanS2016+stdS2016,'r--')

plot(monthstart(1:12),meanS2016-stdS,'r--')

xlabel('Day Of Year')

ylabel ('SSS (ppt)')

title ('L4 monthly Mean Sea Surface Salinity')

set(gca,'XLim',[1 366])

legend('2009-2015','2016')

subplot (3,1,3)

plot(monthstart(1:12),meanTu,'b-', 'LineWidth', 2)

hold on

plot(monthstart(1:12),meanTu2016,'r-', 'LineWidth', 2)

plot(monthstart(1:12),meanTu+stdTu,'b--')

plot(monthstart(1:12),meanTu-stdTu,'b--')

plot(monthstart(1:12),meanTu2016+stdTu2016,'r--')

plot(monthstart(1:12),meanTu2016-stdTu,'r--')

xlabel('Day Of Year')

ylabel ('SSTu')

title ('L4 monthly Mean Sea Surface Turbility')

set(gca,'XLim',[1 366])

legend('2009-2015','2016')

Answer 1

[Star Strider]

Since you’re using datetime arrays, using the xtickformat function and specifically using 'MM' or 'MMM' as described in the datefmt section of the documentation would likely do what you want.