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cancelElementElement functions can be customized with set and show rules.
set and show rules.Displays a diagonal line over a part of an equation.
This is commonly used to show the elimination of a term.
Example
Here, we can simplify:
$ (a dot b dot cancel(x)) /
cancel(x) $
引数Parameters are the inputs to a function. They are specified in parentheses after the function name.
bodyRequiredRequired parameters must be specified when calling the function.PositionalPositional parameters are specified in order, without names.
The content over which the line should be placed.
lengthSettableSettable parameters can be customized for all following uses of the function with a set rule.
set rule.The length of the line, relative to the length of the diagonal spanning
the whole element being "cancelled". A value of 100% would then have
the line span precisely the element's diagonal.
デフォルト値: 100% + 3pt
例を表示
$ a + cancel(x, length: #200%)
- cancel(x, length: #200%) $
invertedSettableSettable parameters can be customized for all following uses of the function with a set rule.
set rule.Whether the cancel line should be inverted (flipped along the y-axis). For the default angle setting, inverted means the cancel line points to the top left instead of top right.
デフォルト値: false
例を表示
$ (a cancel((b + c), inverted: #true)) /
cancel(b + c, inverted: #true) $
crossSettableSettable parameters can be customized for all following uses of the function with a set rule.
set rule.Whether two opposing cancel lines should be drawn, forming a cross over
the element. Overrides inverted.
デフォルト値: false
例を表示
$ cancel(Pi, cross: #true) $
angle
How much to rotate the cancel line.
- If given an angle, the line is rotated by that angle clockwise with respect to the y-axis.
- If
auto, the line assumes the default angle; that is, along the rising diagonal of the content box. - If given a function
angle => angle, the line is rotated, with respect to the y-axis, by the angle returned by that function. The function receives the default angle as its input.
デフォルト値: auto
例を表示
$ cancel(Pi)
cancel(Pi, angle: #0deg)
cancel(Pi, angle: #45deg)
cancel(Pi, angle: #90deg)
cancel(1/(1+x), angle: #(a => a + 45deg))
cancel(1/(1+x), angle: #(a => a + 90deg)) $
