loop plot add text to only one specific plot year

Background:

time series for temp and chlorophyll from 2006 to current

created subplots for annual plots (four plots and text in the 5th subplot) (2006, 2007, 2008....2024)

saved title with the specific year for each plot (used num2str)

saved to correct path with the year in the filename (used num2str) filename = ['AnnualPlots ', num2str(datedata), '.jpg'], datedata;

filenames are AnnualPlots 2006.jpg, AnnualPlots 2007.jpg, ...AnnualPlots 2024.jpg

Everything checks out....

We had a sampling pause in 2020 and 2021...you know why. I would like to label this in the 2020 plot and 2021 plot.

???Is it possible to add details to an individual plot within a loop like code??? This is for outreach and I have limited coding experience.

% extract date, total chla, 3µm chla, 1 to 3 µm chla, > 3 µm chla
date = Data.DATEPST; % date sampled
sampletemp = Data.Sample_Temp; % deg C
chlaTotal = Data.TChla;  % µg/L
chla3um = Data.Chla3um;% µg/L
chla3um1 = Data.Chla3um1; % 3µm>Chla percent(%)
chla3um2 = Data.Chla3um2; % 3µm<Chla percent(%)

% Get the current year
currentYear = year(datetime('now'));

% Iterate over each year from 2006 to the current year
for datedata = 2006:currentYear

    % Create a new figure for each year
    figure;
    set(gcf, 'Position', [10,10,800,600])
    
    subplot(5,1,1);
    plot(date,sampletemp,"color","#4682B4", "LineWidth",0.5); % #4682B4 steal blue
    yyaxis left
    title({[num2str(datedata) ' Coastal Water (10 m depth)'] 'California'});
    ylabel('Temp (^oC)')
    xlim([datetime(datedata,1,1,0,0,0)...
      datetime(datedata,12,31,0,0,0)])
    datetick('x','mmm','keeplimits','keepticks')
    ylim([6 29])    

where would this go and how to relate it to AnnualPlots 2020.jpg???

txt1 = '- - - - anthropause - - - -';

text(x,3,txt1,'Color','red','FontSize',10,'Rotation',0);

    
    %yyaxis default was red; following code changes it back to black
    ax = gca;
    ax.YColor = 'k'; 

    subplot(5,1,2);
    ...    
    subplot(5,1,3);
    ...
    subplot(5,1,4);
    ...
    subplot(5,1,5);
    ...

    % Save each figure to a specific folder
    filepath = 'C:\Me\Desktop\website figures';
    filename = ['AnnualPlots ', num2str(datedata), '.jpg'], datedata;
    saveas(gcf, fullfile(filepath,filename));
end

Answer 1

[Voss]

If I understand the task correctly, you can use an if condition to create the text object only when datedata is 2020 or 2021.

Example:

filepath = 'C:\Me\Desktop\website figures';

% Iterate over each year from 2006 to the current year
for datedata = 2006:currentYear
    
    % Create a new figure for each year
    figure;
    set(gcf, 'Position', [10,10,800,600])
    
    % make plots
    % ...
    subplot(5,1,1);
    % ...
    subplot(5,1,2);
    % ...
    subplot(5,1,3);
    % ...
    subplot(5,1,4);
    % ...
    subplot(5,1,5);
    % ...
    
    % make text in subplot 5 for 2020/2021
    % [if you want the text in another subplot, move this block up to the
    % appropriate place in the code or capture the subplot axes handle, 
    % e.g., ax=subplot(5,1,2), and then create the text in that axes, i.e.,
    % text(ax,x,3,...)]
    if datedata == 2020 || datedata == 2021
        x = 0; % specify the x-location of the text
        txt1 = '- - - -  anthropause  - - - -';
        text(x,3,txt1,'Color','red','FontSize',10,'Rotation',0);
    end
    
    % Save each figure to a specific folder
    filename = sprintf('AnnualPlots %d.jpg',datedata);
    saveas(gcf, fullfile(filepath,filename));
    
end

[SD]

Hi Voss,

I can see this working, I need to play with the code a bit. Thanks!

[SD]

I got it to work!!!

Subsituted x = 0 for x = datetime(datedata,04,01,0,0,0); Changed the y from 3 to 65

I will have to break it apart for the years since we lost data at the end of 2020 and the beginning of 2021. No other plots were affected. This was super helpfull and now I can easily play with the individual plots from the "loop". THANK YOU!!!

[SD]

I see you changed my filename as well. I was trying to use spintf with %d but was also trying to incorportate the path and the filename in one code. I gave up and split the path and filename and went to basics. Thanks for the added bonus of code. I will revisit sprintf :)

[Voss]

You're welcome!

Answer 2

[Adam Danz]

I recommend using xregion (requires R2023a or later) or xline (requires R2018b or later). With xline you can also include a text label if you'd like.

[SD]

Hi Adam,

This does not solve my first problem but I was going to work on highlighting specific years where the temperature warms up. I am great full and now I know what I am looking for. I will check this out a little furthur. Weekend task :)