Plotting

numbl supports a wide range of 2-D and 3-D plot types. In the browser, plots render directly in the IDE. On the command line, use --plot to open a plot server.

Plot Types

Category	Functions
Line	plot, plot3, fplot, fplot3
Scatter	scatter, scatter3
Bar	bar, barh, bar3, bar3h
Surface	surf, mesh
Contour	contour
Image	imagesc
Histogram	histogram, histogram2
Statistical	boxchart, swarmchart, swarmchart3
Other	stairs, errorbar, area, semilogx, semilogy, loglog, piechart, donutchart, heatmap

Figure Management

figure, subplot, title, xlabel, ylabel, zlabel, sgtitle, legend, hold, grid, axis, view, colormap, colorbar, shading, close, clf, drawnow, pause

Examples

Line Plot

x = linspace(0, 2*pi, 100);
plot(x, sin(x), 'b-', x, cos(x), 'r--');
title('Trig functions');
legend('sin', 'cos');

Surface Plot

[X, Y] = meshgrid(-2:0.1:2);
Z = X .* exp(-X.^2 - Y.^2);
surf(X, Y, Z);
colormap('jet');
colorbar;

Subplots

subplot(2, 1, 1);
plot(1:10, rand(1, 10));
title('Random data');

subplot(2, 1, 2);
bar(1:5, randi(10, 1, 5));
title('Bar chart');

3-D Scatter

n = 200;
x = randn(n, 1);
y = randn(n, 1);
z = randn(n, 1);
scatter3(x, y, z, 20, z, 'filled');
colormap('cool');

CLI Usage

To view plots when running from the command line:

numbl run --plot script.m
numbl --plot              # REPL with plot server

The plot server opens a browser window that updates as plot commands are executed.