Troubleshooting Latex Previewer: Copying and Pasting Code from Forums and PDFs

[Schrodinger's Dog]

The Latex previewer on the Latex thread? It doesn't appear to work properly, I'll admit that I don't know much at all about latex but even when I cut and paste text from say the pdf or the forum directly into the box it comes up with a load of compuspeak and no image? Is there a reason for this so far I've tried x^2\sqrt{x}[\tex] and I get no joy, and a few even simpler equations but nothing but error script? <br /> <br /> Btw I cut and pasted that from the pdf tutorial to make sure I had the format right? Am I beind stupid, is my formatting wrong, or can you not copy and paste latex code from the forum to the test program?<br /> <br /> Ahhh, I tried adding $ signs instead of using the [\tex] tags and it appeared to work; any reason why the tex tags don&amp;#039;t work? As in the instructions it says to place tex tags before maths?&lt;br /&gt; &lt;br /&gt; I&amp;#039;ve just noticed the math mode as well, maybe I should have played around first. I guess everyone just knows that you don&amp;#039;t need to use the format tags unless your a chump &amp;lt;img src=&amp;quot;https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png&amp;quot; class=&amp;quot;smilie smilie--emoji&amp;quot; loading=&amp;quot;lazy&amp;quot; width=&amp;quot;64&amp;quot; height=&amp;quot;64&amp;quot; alt=&amp;quot;:smile:&amp;quot; title=&amp;quot;Smile :smile:&amp;quot; data-smilie=&amp;quot;1&amp;quot;data-shortname=&amp;quot;:smile:&amp;quot; /&amp;gt; but anyway live and learn...

 

[RandallB]

I'm no pro at it but when you write:
x^2\sqrt{x}
Doesn't the slash need to be forward ( / ) not backwards ( \ )as yours seem to be in the closing tag?
While I'm at it does anyone know the Latex to make a "NOT =" sign?

 

[robphy]

While I'm at it does anyone know the Latex to make a "NOT =" sign?

\neq \neq

 

[RandallB]

Thanks,
test on variations of not ; \neq \neq

\geq \geq
\ngeq \geq

\leq \leq
\nleq \nleq

\simeq \simeq
... \nsimeq ... is not valid

 

[robphy]

Thanks,
test on variations of not ; \neq \neq

\geq \geq
\ngeq \geq

\leq \leq
\nleq \nleq

\simeq \simeq
... \nsimeq ... is not valid

\not\eq \not\eq

\not\geq \not\geq

\not\leq \not\leq

\not\simeq \not\simeq

\not 5 \not 5

 

[Schrodinger's Dog]

I'm no pro at it but when you write:
x^2\sqrt{x}
Doesn't the slash need to be forward ( / ) not backwards ( \ )as yours seem to be in the closing tag?
While I'm at it does anyone know the Latex to make a "NOT =" sign?

It doesn't like tex tags forward slashed or backwards although point noted.(in the tutorial it's actually that way which is where I copied it from)

It also doesn't use \frac instead it uses the format 1 \over 2.

 

[Gokul43201]

SD, are you talking about the preview mode or posting in general?

LaTeX is not enabled in preview mode...unless you're using the previewer linked here: https://www.physicsforums.com/showthread.php?t=144652 , but there's problems with that tester.

 

[Schrodinger's Dog]

SD, are you talking about the preview mode or posting in general?

LaTeX is not enabled in preview mode...unless you're using the previewer linked here: https://www.physicsforums.com/showthread.php?t=144652 , but there's problems with that tester.

Yeah that's the one, I didn't realize it had been highlighted already, the idea was to let people know there are a few issues with that previewer so job done. Thanks people for the advice.