calendar heatmap

A GitHub-style calendar heatmap implemented in MATLAB.

Basic usage

% Generate a set of relatively continuous but fluctuating data.
T = datetime(2022, 1, 1) : datetime(2022, 12, 31);
t = linspace(1, length(T), 10);
V = interp1(t, rand(size(t)), 1:length(T)) + rand(1, length(T))./3;

% Draw calendar heatmap.
calHeatmap(2022, T, V)

% Adjust figure and axes size.
set(gcf, 'Position', [100, 500, 1500, 260])
set(gca, 'Position', [.03, .03, .9, .9])

% Adjust colormap.
colormap(pink)

Draw a calendar heatmap with missing dates

% Generate a set of relatively continuous but fluctuating data
% for only the first half of the year.
T = datetime(2022, 1, 1) : datetime(2022, 6, 30);
t = linspace(1, length(T), 10);
V = interp1(t, rand(size(t)), 1:length(T)) + rand(1, length(T))./3;

% Draw calendar heatmap.
calHeatmap(2022, T, V)

% Adjust figure and axes size.
set(gcf, 'Position', [100, 500, 1500, 260])
set(gca, 'Position', [.03, .03, .9, .9])

Draw a calendar heatmap between two months

% Generate a set of relatively continuous but fluctuating data.
T = datetime(2022, 1, 1) : datetime(2022, 12, 31);
t = linspace(1, length(T), 10);
V = interp1(t, rand(size(t)), 1:length(T)) + rand(1, length(T))./3;

% Generate calendar heatmaps from February to March.
% calHeatmap(year, time, value, [from, to])
calHeatmap(2022, T, V, [2, 3])

% Adjust figure and axes size.
set(gcf, 'Position', [100, 100, 800, 600])
set(gca, 'Position', [.15, .15, .7, .7])

Concatenation of calendar heatmaps for multiple years

load SimulatedStock.mat 

T = TMW.Time;
V = TMW.High;

% Draw three heatmaps
ax1 = axes(gcf, 'Position', [0.06, 2/3 + 0.01, 1 - 0.07, 1/3 - 0.03]);
calHeatmap(ax1, 2013, T, V)
ax2 = axes(gcf, 'Position', [0.06, 1/3 + 0.01, 1 - 0.07, 1/3 - 0.03]);
calHeatmap(ax2, 2014, T, V)
ax3 = axes(gcf, 'Position', [0.06, 0 + 0.01, 1 - 0.07, 1/3 - 0.03]);
calHeatmap(ax3, 2015, T, V)

% Draw title and adjust position
TT = title(ax1, {'Simulated Stock heatmap'}, 'FontSize', 18, 'FontWeight', 'bold', 'FontName', 'Times New Roman');
TT.Position(2) = -0.1;

set(gcf, 'Position', [100, 100, 1200, 620])

% Adjust colormap
colormap(turbo)

% % Use colormap toolkit - slanCM
% % See : https://www.mathworks.com/matlabcentral/fileexchange/120088-200-colormaps
colormap(slanCM(21))

Built-in colormap of the function

slanCM(21)

slanCM(53)

turbo()