[Tex/LaTex] How give space text in math mode

math-modespacing

I have a problem about space text in math mode , and i have minimal working anwers like this following from Microsoft Word :
with space in Microsoft Word

But, since i use LaTeX dont space text in math mode, like this following from LaTeX result :
not space in LaTeX result

How give space text math mode in LaTeX ?
I use code LaTeX like this

\begin{tabular}{lll}

$Biaya total_{kincir angin}$&=&40 $\times$ Rp 60.000.000,00\\
                          &=&  Rp 2.400.000.000,00
\end{tabular}

and

 \begin{tabular}{lll}

$Biaya total_{kincir angin}$&=& 3000 $\times$ Rp 5.000.000,00\\
                            &=& Rp 15.000.000.000,00
\end{tabular}

Best Answer

\documentclass[preview,border=12pt]{standalone}% change it back to your own document class
\usepackage{amsmath}
\usepackage[
    group-separator=.,
    output-decimal-marker={,},
]{siunitx}

\def\dummy{%
Karl's students do not care about dashing patterns. 
Karl's students do not care about arrow tips. 
Karl's students, by the way, do not know what a transformation matrix is.}

\begin{document}
\dummy
\begin{align*}
\text{Biaya Total}_{\,\text{kincir angin}}
    &= 40 \times \SI{60000000.00}[Rp\,]{}\\
    &= \SI{2400000000.00}[Rp\,]{}
\end{align*}
\dummy
\end{document}

enter image description here

Remarks:

always specify your decimal numbers with a period as the decimal marker.
always use siunit when specifying numbers such that you can change the setting globally.
group-separator=. makes the input 123456 get rendered as 123.456.
output-decimal-marker={,} makes the input 12.23 get rendered as 12,45.
Combining both group-separator=.,output-decimam-marker={,} makes the input 123456.78 get rendered as 123.456,78.
use align* to vertically align the =s and to remove the equation numbers.
use \text in math mode to make texts get rendered as normal texts.

Related Solutions

[Tex/LaTex] What are semantically correct alternatives to \text in math mode

I'm afraid you hit no correct choice. ;-)

$\fT_\text{triv} = \Set{\emptyset, X}$ : incorrect. Define
```
\newcommand{\ts}[1]{\textnormal{#1}} % textual subscript
```
and use $\fT_{\ts{triv}}. You can later change your mind about the typesetting of \ts. With \text you're not guaranteed to get upright shape, for example in the statement of a theorem.
$g \circ f = \text{id}_X$ : incorrect. Define
```
\newcommand{\id}{\textnormal{id}}
```
(or with \textit, which I'd prefer).
$\text{Isom}(X)$ : incorrect. It's an operator, so $\operatorname{Isom}(X)$ . Defining a command with \DeclareMathOperator is of course a good choice. The same considerations hold for “grad”, “cov”, ”sgn” and ”Gal”.
\[ \text{Let } x = \text{ number of cats} \]: incorrect. “Let” should not go in the displayed equation. So
```
Let
\[
x=\text{number of cats}
\]
```
with no space before “number”.

The longer one should be

\begin{align*}
U \subseteq \mathbb{R}^n \text{ offen} \Leftrightarrow 
  &\text{für jedes $x \in U$ gibt es $r > 0$,}\\
  &\text{sodass $\fB_r(x) = \Set{y \in \mdr^n | d(x,y) < r} \subseteq U$}
\end{align*}

so you don't have to think where spaces are necessary.

I wouldn't use a macro \Set with delimited argument, preferring

\newcommand{\Set}[2]{\{\,#1\mid #2\,\}}

and \Set{y \in \mdr^n}{d(x,y) < r}. This is more consistent with LaTeX syntax. If your \Set macro has just one normal argument, then use \mid and not |.

[Tex/LaTex] Adding Non-breaking space after single character in text mode

It would be a bit fragile to do that in TeX: I'd do the replace with a regex in the editor as you suggest. (If you just wanted to make a ~ in text and a normal space in math that would be easier, but having it work in listings and verbatim would be harder)

For example given

\documentclass{article}

\usepackage{amsmath}

\begin{document}

A new example here will add a "tilde", after single letter, but will skip math mode.
$12 \times A = 128$
\[ a b c = 123\]
and a bit nore text
\begin{align}
a &= b\\
x & = y 
\end{align}

\begin{verbatim}
A new example here will add a "tilde", after single letter,
but will skip math mode.
$12 \times A = 128$
\[ a b c = 123\]
and a bit nore text
\begin{align}
a &= b\\
x & = y 
\end{align}
\end{verbatim}


A new example here will add a "tilde", after single letter, but will skip math mode.
$12 \times A = 128$
\[ a b c = 123\]
and a bit nore text
\begin{align}
a &= b\\
x & = y 
\end{align}

\begin{verbatim}
A new example here will add a "tilde", after single letter,
but will skip math mode.
$12 \times A = 128$
\[ a b c = 123\]
and a bit nore text
\begin{align}
a &= b\\
x & = y 
\end{align}
\end{verbatim}

\end{document}

The command M-x addtilde in emacs produces

\documentclass{article}

\usepackage{amsmath}

\begin{document}

A~new example here will add a~"tilde", after single letter, but will skip math mode.
$12 \times A = 128$
\[ a b c = 123\]
and a~bit nore text
\begin{align}
a &= b\\
x & = y 
\end{align}

\begin{verbatim}
A new example here will add a "tilde", after single letter,
but will skip math mode.
$12 \times A = 128$
\[ a b c = 123\]
and a bit nore text
\begin{align}
a &= b\\
x & = y 
\end{align}
\end{verbatim}


A~new example here will add a~"tilde", after single letter, but will skip math mode.
$12 \times A = 128$
\[ a b c = 123\]
and a~bit nore text
\begin{align}
a &= b\\
x & = y 
\end{align}

\begin{verbatim}
A new example here will add a "tilde", after single letter,
but will skip math mode.
$12 \times A = 128$
\[ a b c = 123\]
and a bit nore text
\begin{align}
a &= b\\
x & = y 
\end{align}
\end{verbatim}

\end{document}

where addtilde is defined by

(defun hidespaceenv (e)
  (goto-char (point-min))
  (while (re-search-forward 
      (if (string-equal e "[") "\\\\\\["
        (if (string-equal e "$") "\\$"
          (concat "\\\\begin{" e "}")))
      nil 1)
    (while (re-search-forward "\\([a-zA-Z]\\)\\(\\s-+\\)\\|\\(\\\\begin\\)" (save-excursion(re-search-forward 
                                  (if (string-equal e "[") "\\\\\\]"
                                    (if (string-equal e "$") "\\$"
                                      (concat "\\\\end{" e "}")))
                                  nil 1) (point)) 1)
      (replace-match "\\1SPACE@@\\2\\3@@" t))))

(defun addtilde ()
  (interactive)
  (mapcar `hidespaceenv (list "verbatim" "align" "equation" "[" "$"))
  (goto-char (point-min))
  (while (re-search-forward "\\(\\(^\\|\\s-+\\)[a-zA-Z]\\)\\s-+" nil 1)
    (replace-match "\\1~"))
  (goto-char (point-min))
  (while (re-search-forward "SPACE@@\\(\\s-+\\|\\\\begin\\)@@" nil 1)
    (replace-match "\\1")))

Best Answer

Remarks:

Related Solutions

[Tex/LaTex] What are semantically correct alternatives to \text in math mode

[Tex/LaTex] Adding Non-breaking space after single character in text mode

Related Question