Make contour plot with z values against year in x-axis and Date in y-axis?

I have a CSV file with temperature values. The temperature values are for each day of june month from 1990-2020. See the attached file. I am plotting a contour plot of temperature values against year and day with years in x-axis and day in y-axis. Kindly help me out. Thanks in advance!

Answer 1

[Manish]

Hi,

I understand you want to contour plot of the temperature where years on the x-axis and day on y-axis and temperature on the z-axis.

Here is the code implementation :

data = readtable('mean_temp_june1.csv');
% Convert the date column to datetime format using the correct format
dates = datetime(data.date, 'InputFormat', 'dd-MM-yyyy');
data.date = dates;
data.day = day(data.date);
unique_years = unique(data.year);
unique_days = unique(data.day);

% Create a matrix for temperature data
temp_matrix = NaN(length(unique_days), length(unique_years));
% Fill the matrix with temperature values
for i = 1:height(data)
    day_index = find(unique_days == data.day(i));
    year_index = find(unique_years == data.year(i));
    temp_matrix(day_index, year_index) = data.temp_min(i);
end
% Create the contour plot
figure;
contour(unique_years, unique_days, temp_matrix, 'LineColor', 'none');
colorbar;
% Add labels and title
xlabel('Year');
ylabel('Day of June');
title('Contour Plot of Temperature Values (June 1990-2020)');
% Display the plot
grid on;

Hope this solves!Happy coding!!