pretty print question

[Juan Grados]

Dears members,

I want make a pretty_print in the follow code but I get false, and I want get the pretty expression of

$$x=\left(\begin{array}{rr}

1 & 2 \\

3 & 4

\end{array}\right)$$

var('x')

>A=matrix([[1,2],[3,4]])

>pretty_print(x==A)

How I will be able to fix that?

--
---------------------------------------------------------------------
MSc. Juan del Carmen Grados Vásquez
Laboratório Nacional de Computação Científica 
Tel: +55 24 2233-6260

(http://www.lncc.br/)
http://juaninf.blogspot.com
---------------------------------------------------------------------

[Dominique Laurain]

x = var('x')

A=matrix([[1,2],[3,4]])

print "$$x=",latex(A),"$$"
pretty_print('x='+latex(A))

[Dominique Laurain]

x = var('x')

A=matrix([[1,2],[3,4]])

print "$$x==",latex(A),"$$"
pretty_print('x=='+latex(A))

[Juan Grados]

thanks but I get

$$x= \left(\begin{array}{rr}

1 & 2 \\
3 & 4
\end{array}\right) $$

\newcommand{\Bold}[1]{\mathbf{#1}}\hbox{x=\left(\begin{array}{rr}
1 & 2 \\
3 & 4
\end{array}\right)}

the latex code and not pretty print

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[P Purkayastha]

pretty_print('x = ', matrix([[1,2], [3,4]]))

[P Purkayastha]

If you want x to be typeset normally, then you can do the following:

pretty_print(LatexExpr('x = '), matrix([[1,2], [3,4]]))

[Dominique Laurain]

I don't know so much about cell display in SAGE cloud...but I guess... there are step s:

1. cell content in ASCII raw text is processed by Tex 

2. tex content is then displayed by Mathjax 

I am sure about Mathjax because I can  mouse right button click on the displayed matrix in my browser (currently Chrome) and I get

one menu about Mathjax renderer (can be HTML-CSS, Mathml or SVG ; I cannot use MathMl because my browser has not brwser extension to display mathml ; SVG is my default display)

With the menu "show math as / tex commands" I get :

{x= \left(\begin{array}{rr} 1 & 2 \\ 3 & 4 \end{array}\right)} That means that default commands (set by new command) have been already parsed by Tex before send to Mathjax. I can advice you to check is your browser can parse Mathjax commands : go to URL www.mathjax.org with your browser, to check if you have nice display

 of math upper right in the windo w. If not, check Javascript is ok.

If ok, then try to use various things in the SAGE cloud : first try to process a TEX file ; second search in one terminal is tex working for your projects; third, use the %latex tag in one cell

[P Purkayastha]

It depends on how Sage presents the latex in the HTML code. Mathjax
does not parse all latex code. It only parses those that are in a
special <span> or <div>.

One way to get Sage to pass on the latex within the specific <span> or
<div> is to make the string a "LatexExpr" string.

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[P Purkayastha]

On Mon 07 Apr 2014 03:34:40 PM SGT, P Purkayastha wrote:
> It depends on how Sage presents the latex in the HTML code. Mathjax
> does not parse all latex code. It only parses those that are in a
> special <span> or <div>.
>
> One way to get Sage to pass on the latex within the specific <span> or
> <div> is to make the string a "LatexExpr" string.

Sorry, I should have checked before mailing. Sage passes on the latex
in a <script> tag. And MathJax generates the required <span> or <div>.
You can look at methods and classes in the file "sage.misc.latex??" to
see what is generated.