Cannot align to right or left

Question

I have this LaTeX code which should place this two images on the left and the right of the page:

\begin{flushright} \begin{figure}[H]
\includegraphics[width=107px ,
height=134px]{t1.jpg} \end{figure}
\end{flushright}

\begin{flushleft} \begin{figure}[H]
\includegraphics[width=113px ,
height=190px]{t2.jpg} \end{figure}
\end{flushleft}

but the two images are placed one at the top of the other, why??

Answer 1

There are a number of issues:

figure is a floating environment. It is not placed directly but stored and placed where LaTeX thinks it fits best. This can be influenced by the optional argument like [H] but surrounding alignment environment still don't have any influence on it.

flushleft and flushright produce paragraphs and therefore a line break. So both contents will always vertical stacked, never side by side.

Note that you don't need a figure environment to use \includegraphics, only if you want a caption. Also you can have multiple images and captions (!) in one figure. Try the following code to place the two images side-by-side and at the left and right corner (if this is what you want):

\begin{figure}[H]
\includegraphics[width=107px,height=134px]{t1.jpg}%
\hfill
\includegraphics[width=113px,height=190px]{t2.jpg}%
\end{figure}

Answer 2

You don't need any figure environment, if you don't want to add a caption. Just write

\begin{center}
\includegraphics[width=107px,height=134px]{t1.jpg}%
\hfill
\includegraphics[width=113px,height=190px]{t2.jpg}
\end{center}

The two images will be vertically aligned at their bottom.

Answer 3

Some more explanations:

First of all, a figure environment is actually a \vbox of width \columnwidth (with many properties). It is impossible to put two successive figure environments (float or non-float) side by side.

Furthermore, you cannot use flushleft environment and flushright environment to typeset side by side materials. The two environments are defined using trivlist environment. They can only placed vertically, if not included in other boxes.

You should, as Martin does, put the two images into one figure environment. And use subcaption or subfig package if you want separate sub-captions.

Answer 4

If the figures are related, you could also create one figure with subfigures.

There is a package available to do this: subfig

For subfig,

\usepackage{subfig}

\begin{figure}
\centering
\subfloat[caption]{\includegraphics[]}
\subfloat[caption]{\includegraphics[]}
...
\end{figure}

There are more details on options in their respective package descriptions. Also mentioned in the comment is subcaption