String Representation of Boxes
provides a compact way of representing boxes in terms of strings. This is particularly convenient when you want to import or export specifications of boxes as ordinary text.
It is important to distinguish between forms that represent just raw boxes, and forms that represent the meaning
of the boxes.
The expression generated here is a power.
|\!\(input\)||the meaning of the boxes|
Distinguishing raw boxes from the expressions they represent.
If you copy the contents of a StandardForm
cell into another program, such as a text editor, Mathematica
will generate a
form where necessary. This is done so that if you subsequently paste the form back into Mathematica
, the original contents of the StandardForm
cell will automatically be re-created. Without the
, only the raw boxes corresponding to these contents would be obtained.
With default settings for options,
forms pasted into Mathematica
notebooks are automatically displayed in two-dimensional form.
|"\(input\)"||a raw character string|
|"\!\(input\)"||a string containing boxes|
Embedding two-dimensional box structures in strings.
will usually treat a
form that appears within a string just like any other sequence of characters. But by inserting a
you can tell Mathematica
instead to treat this form like the boxes it represents. In this way you can therefore embed box structures within ordinary character strings.
treats this as an ordinary character string.
that this string contains boxes.
You can mix boxes with ordinary text.
|\*input||construct boxes from input|
Input forms for boxes.
requires that any input forms you give for boxes be enclosed within
. But within these outermost
you can use additional
to specify grouping.
Here ordinary parentheses are used to indicate grouping.
Without the parentheses, the grouping would be different.
specify grouping, but are not displayed as explicit parentheses.
lead to the construction of a RowBox
When you type
as input to Mathematica
, the first thing that happens is that
are recognized as being separate "tokens". The same separation into tokens is done when boxes are constructed from input enclosed in
. However, inside the boxes each token is given as a string, rather than in its raw form.
broken into separate strings.
Spaces around the
are by default discarded.
Here two nested RowBox
objects are formed.
The same box structure is formed even when the string given does not correspond to a complete Mathematica
sequences, you can set up certain kinds of boxes by using backslash notations such as
. But for other kinds of boxes, you need to give ordinary Mathematica
input, prefaced by
in effect acts like an escape: it allows you to enter ordinary Mathematica
syntax even within a
sequence. Note that the input you give after a
can itself in turn contain
You can alternate nested
. Explicit quotes are needed outside of
|\!\(input\)||interpret input in the current form|
|\!\(form\`input\)||interpret input using the specified form|
Controlling the way input is interpreted.
The backslash backquote sequence tells Mathematica
to interpret this in TraditionalForm
When you copy the contents of a cell from a notebook into a program such as a text editor, no explicit backslash backquote sequence is usually included. But if you expect to paste what you get back into a cell of a different type from the one it came from, then you will typically need to include a backslash backquote sequence in order to ensure that everything is interpreted correctly.