Point Grapher | Cartesian & Polar | Plot Point & Line Graphs

Discover our free online Point Grapher. Utilizing the most sophisticated Cartesian and polar coordinate systems it uniquely allows you rotate axes and visualize coordinates or your data in oblique coordinate systems.

Instructions

Our point grapher is easy to use; type in the coordinates of a set of points. The point grapher plots the given set of points as you type (default). The points (a₁,b₁),(a₂,b₂),... are entered as a₁,b₁; a₂,b₂; ... In other words, separate the coordinates of each point by a comma and the points themselves by a semicolon (note that parentheses are excluded). The last semicolon is optional, see the note below. You can use numeric expressions such as 1/2+sin(π/3) for point coordinates.

To draw the points in the polar coordinate system as (r_n,θ_n), select the Polar checkbox. You can enter the radial angles θ_n in radians, degrees, or grades by selecting the corresponding angle mode.

Cartesian Points Grapher - Cartesian Plot — **Point grapher**: Points in Cartesian coordinate system.

Polar Points Grapher - Polar Plot — **Polar point grapher**: Points in polar coordinate system.

Points Grapher - Oblique Coordinate System — **Point grapher**: Points in **oblique** coordinate system.

To graph two or more point sets in the same Cartesian or polar coordinate system, press the » icon to display the multi-graph pane. The multi-graph pane consists of expression panels, which can be added or deleted as desired by pressing + or × on each panel, respectively. Selecting or deselecting the checkbox for any expression displays or hides the corresponding point set.
To connect the points in the focused expression box with line segments, press the Connect toggle button. You can press it again to disconnect the points. Note: when connecting the points, if the last point ends with the semicolon, it will be connected to the first point to form a (closed) polygon.
To copy or save graphs first press the Copy/Save graph button. An image of the graphs will appear below the Cartesian and polar coordinates grapher. You can then use your browser's capability to save it or copy it in your documents.

Press the ⚙ (gear) button to set options (if the button is hidden, first click on the ▼ icon at the top right of the canvas):

Change the size of the points by using the provided slider .
Select the angle mode (radians – default, degrees or grades).
If you deselect the Graph as you type option, you will have to press the Graph selected expressions button, which then appears at the bottom of the grapher, to update the graphs whenever you make any changes to the expressions or coordinate plane (i.e., move the origin, rotate axes, etc.).
Optionally display the controls on the top of the point plotter that enable you to start/pause/stop the automatic rotation of any or all axes.
The points plotter remembers the sets of points you enter and retrieves them between visits. You can clear them by pressing the Reset Calculator button.