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# rubberbox

rubberband box for rectangle selection

### Syntax

[final_rect, btn] = rubberbox() [final_rect, btn] = rubberbox(initial_rect) [final_rect, btn] = rubberbox(edition_mode) [final_rect, btn] = rubberbox(initial_rect, edition_mode)

### Arguments

- initial_rect
a vector with two or four entries. With four entries it gives the initial rectangle defined by

`[x_min, y_max, width, height]`

(where`x_min`

and`y_max`

are coordinates of initial corner position, with two entries width and height are supposed to be 0.- edition_mode
a boolean, if

`edition_mode`

is`%t`

button press selects the first corner, release selects the opposite corner. If`edition_mode`

is`%f`

, a button press or click selects the first corner, a click is requested to select the opposite corner. The default value is`%f`

.- final_rect
a rectangle defined by

`[x_min, y_max, width, height]`

.- btn
an integer, the number of the mouse button clicked.

### Description

`rubberbox(initial_rect)`

tracks a rubberband box in
the current graphic window, following the mouse. When a button is
clicked `rubberbox`

returns the final
rectangles definition in `final_Rect`

. If the
argument `initial_rect`

is not specified, a click
is needed to fix the initial corner position.

### Examples

clf plot2d() a = gca(); db = a.data_bounds; x0 = (db(1)*2+db(2))/3; dx = (db(2)-db(1))/3; y0 = (db(3)+db(4)*2)/3; dy = (db(4)-db(3))/3; xtitle(msprintf("With an initial starting corner: x0 = %0.2f, y0 = %0.2f",x0,y0)) r = rubberbox([x0 y0])

clf plot2d() a = gca(); db = a.data_bounds; x0 = (db(1)*2+db(2))/3; dx = (db(2)-db(1))/3; y0 = (db(3)+db(4)*2)/3; dy = (db(4)-db(3))/3; xtitle(msprintf("With an initial box: x0 = %0.2f, y0 = %0.2f, width = %0.2f, height = %0.2f,",x0-dx/4,y0+dy/5,2*dx,dy)) r = rubberbox([x0-dx/4 y0+dy/5 2*dx dy])

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