# 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.

Our point grapher is a powerful coordinates plotting tool that lets you easily plot points given by ordered pairs `(an,bn)`.

You can easily switch between Cartesian and polar coordinate systems to visualize point or line graphs in each system by toggling the Polar checkbox.

Our online point plotter is unique in its ability to rotate axes. This allows you plot points, and create point or line graphs in oblique coordinate systems, where the axes can be rotated to any angle and have any orientation.

To plot, for example, the points `(1,2)` and `(3,4)`, simply enter them as follows (spaces are optional): `1,2; 3,4;`

When graphing points in polar coordinates, this coordinates grapher enables you to input angular coordinates in various units–radians, degrees, and grades.

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To copy or save graphs right click on the image of a saved graph below and select "Copy image" or "Save image" from the pop-up menu.

As you type:
• pi is replaced by `π`.

MouseMatics: Learn how you can use your mouse to rotate axes (graph in oblique coordinate system), change scales, and move coordinate system.

## 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 `(rn,θn)`, select the Polar checkbox. You can enter the radial angles `θn` in radians, degrees, or grades by selecting the corresponding angle mode.

• 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 .