Graph module

The graph module adds lua functions necessary to render graphs in the IDE code cells.

Usage

Create a Graph

NewGraph() creates a new graph object, which will be further used by other functions for plotting.

g0 = NewGraph()

Set title

SetTitle(graph, title) sets the title of the graph object.

SetTitle(g0, "Sample Graph")

Set X and Y axis labels

SetXLabel(graph, label) sets the label for the x-axis.

SetYLabel(graph, label) sets the label for the y-axis.

SetXLabel(g0, "Space")
SetYLabel(g0, "Time")

Plot a point

To plot a point, you will need a graph object and the x and y coordinates of the point.

AddPoint(graph, x, y) adds a point to the graph object.

AddPoint(g0, 5,5) -- adds a point at x=5, y=5

Plot a line

To plot a line, you will need a graph object the starting x,y coordinates and the ending x,y coordinates.

AddLine(graph, x1, y1, x2, y2) plots a line to the graph object.

AddLine(g0, 1,6, 10,10) -- draws a line from x=1,y=6 to x=10,y=10

Render the graph

To render the graph, you will need a graph object.

ShowGraph(graph) renders the graph object in an IDE code cell.

ShowGraph(g0)
-- depending on code, you might need to return this function to render the graph
-- return ShowGraph(g0)

g0 = NewGraph()
SetTitle(g0, "Circle")
 
for i=0, 360, 10 do
    x = 5 * math.cos(math.rad(i))
    y = 5 * math.sin(math.rad(i))
    if px and py then
        AddLine(g0, px, py, x, y)
    end
    px = x
    py = y
end
 
return ShowGraph(g0)