Package Max

change

Filter out repetitions of a number

Description

Output a number only if it is different from the stored number and will reset the stored number to that differing input number. Alternate modes of operation also identify greater-than or less-than the conditions.

Arguments

initial-value[int or float]
optional

Sets the initial value for comparison to incoming numbers. If there is no argument, the initial value is 0 .

mode[symbol]
optional

A second argument may be + or - , a change to mode + or mode - . Subsequent mode messages can change this behavior.

Attributes

Common Box Attributes

Below is a list of attributes shared by all objects. If you want to change one of these attributes for an object based on the object box, you need to place the word sendbox in front of the attribute name, or use the object's Inspector.

annotation[symbol]

Sets the text that will be displayed in the Clue window when the user moves the mouse over the object.

background[int]: 0

Adds or removes the object from the patcher's background layer. background 1 adds the object to the background layer, background 0 removes it. Objects in the background layer are shown behind all objects in the default foreground layer.

color[4 floats]

Sets the color for the object box outline.

fontface[int]

Sets the type style used by the object. The options are:

plain
bold
italic
bold italic Possible values:

0 = 'regular'
1 = 'bold'
2 = 'italic'
3 = 'bold italic'

fontname[symbol]

Sets the object's font.

fontsize[float]

Sets the object's font size (in points). Possible values:

'8'
'9'
'10'
'11'
'12'
'13'
'14'
'16'
'18'
'20'
'24'
'30'
'36'
'48'
'64'
'72'

hidden[int]: 0

Toggles whether an object is hidden when the patcher is locked.

hint[symbol]

Sets the text that will be displayed in as a pop-up hint when the user moves the mouse over the object in a locked patcher.

ignoreclick[int]: 0

Toggles whether an object ignores mouse clicks in a locked patcher.

jspainterfile[symbol]

You can override the default appearance of a user interface object by assigning a JavaScript file with code for painting the object. The file must be in the search path.

patching_rect[4 floats]: 0. 0. 100. 0.

Sets the position and size of the object in the patcher window.

position[2 floats]
write-only

Sets the object's x and y position in both patching and presentation modes (if the object belongs to its patcher's presentation), leaving its size unchanged.

presentation[int]: 0

Sets whether an object belongs to the patcher's presentation.

presentation_rect[4 floats]: 0. 0. 0. 0.

Sets the x and y position and width and height of the object in the patcher's presentation, leaving its patching position unchanged.

rect[4 floats]
write-only

Sets the x and y position and width and height of the object in both patching and presentation modes (if the object belongs to its patcher's presentation).

size[2 floats]
write-only

Sets the object's width and height in both patching and presentation modes (if the object belongs to its patcher's presentation), leaving its position unchanged.

textcolor[4 floats]

Sets the color for the object's text in RGBA format.

textjustification[int]

Sets the justification for the object's text. Possible values:

0 = 'left'
1 = 'center'
2 = 'right'

varname[symbol]

Sets the patcher's scripting name, which can be used to address the object by name in pattr, scripting messages to thispatcher, and the js object.

Messages

int

The number is sent out the outlet only if it is different from the currently stored value. Replaces the stored value.

Arguments:
  • input [int]

float

Outputs the number only if it is different from the currently stored value. Replaces the stored value.

Arguments:
  • input [float]

mode

Sets the detection mode of change. The word mode , followed by a + , causes change to send a 1 out its left outlet if the received number is greater than the previously received number.
The word mode , followed by a - , causes change to send out a -1 if the received number is less than the previously received number.
The word mode by itself returns change to its default mode of sending out received values that differ from the previously received input.

Arguments:
  • flag (+ or -) [symbol]

set

Replaces the stored value without triggering output.

Arguments:
  • stored value [number]

Output

int

Out left outlet: The number received in the inlet is sent out only if it is different from the stored value.

Out middle outlet: If the stored value is 0 and the input is not 0, 1 is sent out; otherwise nothing is sent out.

Out right outlet: If the stored value is not 0 and the input is 0, 1 is sent out; otherwise nothing is sent out.

See Also

Name Description
peak Output larger numbers
togedge Report zero/non-zero transitions
trough Output a number if it is less than previous numbers