how to comment on ploting data in graph?

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Engineer Batoor khan mummand
编辑： Image Analyst 2020-10-22
Hi all;
i want to plot these two series of data and just nominate or comment two valuse from below series of data in ploting graph.
for example i want to give comment or name to 789 as required value in graph or 500 name as critical value.
solar radiation=[456 789 999 334 556 778 456 234 545 343 300 400 500 600 345]
heat gain=[456 789 765 345 234 654 768 979 567 456 678 453 867 989 234 ]
i will be very thankful .
thanks

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Ameer Hamza
Ameer Hamza 2020-10-22
You can do something like this
solar_radiation=[456 789 999 334 556 778 456 234 545 343 300 400 500 600 345];
heat_gain=[456 789 765 345 234 654 768 979 567 456 678 453 867 989 234];
ax = axes();
hold on
p1 = plot(solar_radiation, heat_gain);
p2 = plot(500, heat_gain(solar_radiation==500), '.', 'MarkerSize', 50, 'DisplayName', 'Required Value');
p3 = plot(789, heat_gain(solar_radiation==789), '.', 'MarkerSize', 50, 'DisplayName', 'Critical Value');
legend([p2 p3])
  2 个评论
Engineer Batoor khan mummand
Engineer Batoor khan mummand 2020-10-22
thank you so much dear...
i want to import average of each day solar radiation from attached excel file but average of those solar radiation values which is greather than 200 for each day .
i will be very thankful dear.
thanks
Image Analyst
Image Analyst 2020-10-22
编辑：Image Analyst 2020-10-22
I gave you code for getting the averages in your other, duplicate question. https://www.mathworks.com/matlabcentral/answers/615963-how-to-filter-imported-data-which-is-imported-from-excel#comment_1079048
Here it is again.
[numbers, strings, rawData] = xlsread('hiii.xlsx');
daysOfWeek = strings(2:end, 2);
% Threshold at 200
goodIndexes = numbers >= 200;
% Extract only those elements above 200.
numbers = numbers(goodIndexes);
daysOfWeek = daysOfWeek(goodIndexes);
% Label each individual day.
sequentialDays = ones(length(daysOfWeek), 1);
for k = 2 : length(sequentialDays)
if ~strcmpi(daysOfWeek{k}, daysOfWeek{k-1})
% It's not the same as the prior day so we're starting a new day.
sequentialDays(k:end) = sequentialDays(k-1) + 1;
end
end
% Get the averages over any and all hours of each day.
dailyAverages = splitapply(@mean, numbers, sequentialDays);
plot(dailyAverages, 'b-', 'LineWidth', 2);
title('Daily Average of Solar Radiation', 'FontSize', 18);
xlabel('Day', 'FontSize', 18);
ylabel('Average over the Day', 'FontSize', 18);
grid on;
% Smooth the daily averages
smoothedAverages = movmean(dailyAverages, 45);
hold on;
plot(smoothedAverages, 'r-', 'LineWidth', 4);
legend('Data >= 200', 'Smoothed');
g = gcf;
g.WindowState = 'maximized';
fprintf('Done running %s.m ...\n', mfilename);

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