Graphical input from mouse or cursor

`[x,y] = ginput(n)`

[x,y] = ginput

[x,y,button] = ginput(...)

`ginput`

raises crosshairs in
the current axes to for you to identify points in the figure, positioning
the cursor with the mouse. The figure must have focus before `ginput`

can
receive input. If it has no axes, one is created upon the first click
or keypress.

`[x,y] = ginput(n)`

enables
you to identify `n`

points from the current axes
and returns their *x*- and *y*-coordinates
in the `x`

and `y`

column vectors.
Press the **Return** key to terminate the input before
entering `n`

points. Specify `n`

as
a positive integer.

`[x,y] = ginput`

gathers an
unlimited number of points until you press the **Return** key.

`[x,y,button] = ginput(...)`

returns
the *x*-coordinates, the *y*-coordinates,
and the button or key designation. `button`

is a
vector of integers indicating which mouse buttons you pressed (1 for
left, 2 for middle, 3 for right), or ASCII numbers indicating which
keys on the keyboard you pressed.

Clicking an axes makes that axes the current axes. Even if you
set the current axes before calling `ginput`

, whichever
axes you click becomes the current axes and `ginput`

returns
points relative to that axes. If you select points from multiple axes,
the results returned are relative to the coordinate system of the
axes they come from.

```
Error using ginput (line 31)
Terminal mode is no longer supported
``` |

Coordinates returned by `ginput`

are scaled
to the `XLim`

and `YLim`

bounds
of the axes you click (data units). Setting the axes or figure `Units`

property
has no effect on the output from `ginput`

. You
can click anywhere within the figure canvas to obtain coordinates.
If you click outside the axes limits, `ginput`

extrapolates
coordinate values so they are still relative to the axes origin.

The figure `CurrentPoint`

property, by contrast,
is always returned in figure Units, irrespective of axes Units or
limits.

Pick 4 two-dimensional points from the figure window.

[x,y] = ginput(4)

Position the cursor with the mouse. Enter data points by pressing
a mouse button or a key on the keyboard. To terminate input before
entering 4 points, press the **Return** key.

x = 0.2362 0.5749 0.5680 0.2707 y = 0.6711 0.6769 0.4313 0.4401 plot(x,y)

In this example, `plot`

rescaled
the axes *x*-limits and *y*-limits
from `[0 1]`

and `[0 1]`

to ```
[0.20
0.65]
```

and `[0.40 0.75]`

. The rescaling
occurred because the axes `XLimMode`

and `YLimMode`

are
set to `'auto'`

(the default). Consider setting `XLimMode`

and `YLimMode`

to `'manual'`

if
you want to maintain consistency when you gather results from `ginput`

and
plot them together.

Was this topic helpful?