how to comment on ploting data in graph?

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

[Ameer Hamza]

The two vectors you have written have different lengths.

[Engineer Batoor khan mummand]

i editted my question dear .

Answer 1

[Ameer Hamza]

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])

[Engineer Batoor khan mummand]

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]

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);