Real-time Plots

Whether your data is static or updating in real time, Deephaven supports plotting in Groovy via multiple its built-in plot package.

Basic plots

Deephaven's native plotting library supports many common plot types. To create a simple line plot that ticks in lock-step with the source table:

tLine = timeTable("PT0.2s").update("X = 0.05 * ii", "Y1 = X * sin(X)", "Y2 = 5 * X * cos(X)")

plotLine1 = plot("Y1", tLine, "Timestamp", "Y1").show()

A ticking line plot

Multiple series can be plotted together in the same figure.

plotLine2 = figure()
    .plot("Y1", tLine, "Timestamp", "Y1")
    .plot("Y2", tLine, "Timestamp", "Y2")
    .show()

A ticking plot with multiple series

Plots with multiple axes

twinX and twinY allow you to create plots with multiple x or y axes. For example, you can use twinX to create a plot with two different y axes but a shared x axis.

plotTwin = figure()
    .newChart()
    .plot("Y1", tLine, "Timestamp", "Y1")
    .twinX()
    .plot("Y2", tLine, "Timestamp", "Y2")
    .show()

A ticking plot with two x axes

Subplots

Figures can also contain more than just one plot. For instance, a single figure could contain two plots stacked on top of one another, side by side, four plots in a 2x2 grid, and so on. These subplots are arranged into a grid, and then placed into specific locations in the grid with newChart.

The example below creates a figure with two subplots side-by-side.

plotSub = figure(1, 2)
    .newChart(0, 0)
    .plot("Y1", tLine, "Timestamp", "Y1")
    .newChart(0, 1)
    .plot("Y2", tLine, "Timestamp", "Y2")
    .show()

Two subplots, displayed side-by-side

Far more plots are available, including histograms, pie charts, scatter plots, and more.