---
name: "plot"
section: "4b"
platform: "linux"
package: "emwin"
version: "0.93-6"
release: "Debian 3.1 (Sarge)"
platforms: ["linux"]
url: "https://new.carta.tech/plot/4b"
---

# plot(4b)

graphics interface

## NAME

plot - graphics interface

## DESCRIPTION

Files of this format  are interpreted for various devices by commands described in **plot**(1B). A graphics file is a stream of plotting instructions. Each instruction consists of an ASCII letter usually followed by bytes of binary information. The instructions are executed in order. A point is designated by four bytes representing the *x* and *y* values; each value is a signed integer. The last designated point in an **l**, **m**, **n**, or **p** instruction becomes the \`\`current point'' for the next instruction.

- **m**

  Move: the next four bytes give a new current point.

- **n**

  Cont: draw a line from the current point to the point given by the next four bytes. See **plot**(1B).

- **p**

  Point: plot the point given by the next four bytes.

- **l**

  Line: draw a line from the point given by the next four bytes to the point given by the following four bytes.

- **t**

  Label: place the following ASCII string so that its first character falls on the current point. The string is terminated by a NEWLINE.

- **a**

  Arc: the first four bytes give the center, the next four give the starting point, and the last four give the end point of a circular arc. The least significant coordinate of the end point is used only to determine the quadrant. The arc is drawn counter-clockwise.

- **c**

  Circle: the first four bytes give the center of the circle, the next two the radius.

- **e**

  Erase: start another frame of output.

- **f**

  Linemod: take the following string, up to a NEWLINE, as the style for drawing further lines. The styles are \`\`dotted,'' \`\`solid,'' \`\`longdashed,'' \`\`shortdashed,'' and \`\`dotdashed.'' Effective only in **plot 4014** and **plot ver**.

- **s**

  Space: the next four bytes give the lower left corner of the plotting area; the following four give the upper right corner. The plot will be magnified or reduced to fit the device as closely as possible.

-

  Space settings that exactly fill the plotting area with unity scaling appear below for devices supported by the filters of **plot**(1B). The upper limit is just outside the plotting area.

In every case the plotting area is taken to be square; points outside may be displayable on devices whose face is not square.

- **4014**

  **space(0, 0, 3120, 3120);**

- **ver**

  **space(0, 0, 2048, 2048);**

- **300**, **300s**

  **space(0, 0, 4096, 4096);**

- **450**

  **space(0, 0, 4096, 4096);**

## SEE ALSO

[**graph**(1)](/graph/1.md), **plot**(1B)