### FAQ

Important: when uploading a file (M files should be ok to upload now) give it a unique name. All files are saved in one directory, so if you give it a name that other people already used then you are going to overwrite the other file.

• Move to your page and then add at the end of the URL the following:
 ?action=attr
• To remove password portection put the word clear as a password.
• You can now edit your page , put your code there, upload images and other files etc.

#### How to upload a file? (up to 20MB)

 [[(Attach:)FileName.ext | File Title ]]
• Save the page.
• You will see your file name with a little triangle.
• press the triangle to go to the upload page.

#### How to to display an image?

• The same as uploading a file. The only difference is that you attach the image not as a link:
 Attach:ImageName.jpg | Image Title  not  [[Attach:ImageName.jpg | Image Title]]
• You can control the size of the image by adding this before the attached image, at the beginning of the line:
 %width=100 height=200% Attach:ImageName.jpg | Image Title

#### What is Wiki?

Here are some useful pages installed along with the PmWiki software :

#### Can I use LaTex ?

Yes,it is easy to embed mathematical formulas in wiki pages using the LaTeX math expression syntax.

The markup {$and$} can be used to embed a formula in a wiki page. For example, the markup:

 {$$x^2 + y^2 = z^2$$}

produces:
x^2 + y^2 = z^2

\mathrm{corr}(X,Y)= \frac{\displaystyle \sum_{i=1}^n(x_i-\overline x)(y_i-\overline y)} {\displaystyle\biggl[\sum_{i=1}^n(x_i-\overline x)^2 \sum_{i=1}^n(y_i-\overline y)^2\biggr]^{1/2}}
\mathrm{corr}(X) = \frac{1}{(2\pi)^{N/2}}
f_X(x_1...x_N) = \frac {1}{(2\pi)^{N/2} {\left| \Sigma \right|} ^{1/2}} \exp \left(-\frac{1}{2}(x -\mu)^t \Sigma^{-1} (x-\mu) \right)
f_X(x_1...x_N) = \frac {1}{(2\pi)^{N/2} {\left| \Sigma \right|} ^{1/2}} \exp \left(-\frac{1}{2}(x -\mu)^t \Sigma^{-1} (x-\mu) \right)