The Open Road

Many of our professors use the ‘comments’ function on course sites to have students respond either to one another’s work or to a prompt, as in the example from Professor Rosen’s above.

And comments are not just useful for professors–encouraging comments from users is one of the main ways for a site to interact with the public, particularly the larger public outside CityTech.  But until recently, users couldn’t edit their comments if, say, they rethought what they had said, had something additional to add, or even just misspelled something.

To deal with that, we’ve installed a new plug-in called “Ajax Edit Comments.”  This plug-in allows for comments to be edited by users for a set length of time (the administrator of the site can set that time-length), and it also has a spell check feature.  Unlike most plug-ins, which usually have a specific audience, we really recommend that all OpenLab users activate this one.

Once you’ve activated the plug-in users who post will see–depending on how long the administrator sets it for–an editing interface.  Clicking there will allow users to edit the message, the username, etc.  And they also will see a button which will allow them to request deletion:

All of these options, can be changed by the administrator, and you can do that on the plug-ins page, under settings.  DO REMEMBER THAT IT’S HERE, as the plug-ins page is not the most common place to find the settings interface:

Here you can change the length of time that users can edit, etc.

In addition, the administrator can edit all comments, and will find a more robust set of editing options on the dashboard.

Including an editing interface:

And even a way to adjust comment times, etc:

There’s more information on how to use the plug-in in the video below.  And as always, contact us with any questions!

http://youtu.be/JZyudPKg44g

Contact Form 7 is way of allowing visitors and users to contact you that is simple yet flexible (in wordpress that usually means there’s a simple set-up for people who want simple, and complexity for people who want complexity).  On the OpenLab, this plug-in is probably most useful to clubs and projects, particularly those who have visitors from outside the CityTech OpenLab community.  Here’s a screenshot of the final result:

Below is a nice video with clear explanaition that shows how to use the plugin. Remember (as with many of the video tutorials you’ll find on The Open Road) the Contact Form 7 plugin is already installed on your site.  That means you only need to go to the ‘plugins’ (left hand column of your dashboard) and ‘activate’ it.  That also means you can skip any information in the tutorial about installation.  In this video, that means you can watch the first 30 seconds or so, and then skip to 2:33.  And most of the basic setup info ends about 2 minutes after that.

Hope you like it.  And here you can find support forums, an FAQ, etc.  And as always, contact us with any questions!

Adding a poll to your site is a snap with the WP-Polls plugin!  Clubs and projects can use polls on the OpenLab to determine user needs, interests, or even just set up a meeting time!

This short video is a perfect introduction to this simple plugin.  If you have any questions, remember, you can always contact us!

Image resizing gets easier and easier with WordPress.  Once upon a time editing of that sort had to take place elsewhere, but now most simple image editing can be done directly in the media upload dialogue box, or later in the Media Library.

That said, image-resizing is critically important for a few reasons:  first, it’s good practice to keep images as small as needed in order to keep pages loading smoothly and quickly.  Note that most digital cameras and even some phones are likely to be set to take images that are vastly larger than a user of a computer screen is likely to need (unless you’re NASA, then you might feel the need for this).  Second, all OpenLab posts and pages have media upload limits, and this can help you get under those limits.  And third, OpenLab sites themselves have storage limits–if you are running photograph or image heavy courses (as we do here in the CityTech AD/GA department, for example) or clubs, you might find yourself approaching that limit unnecessarily.  These tips will help with that.  Do note, while all images can be changed later, we can’t recommend enough the importance of editing images when you upload, rather than setting yourself up for the daunting project of going back in to edit when things have gotten out of hand.

To resize your images, after you upload your image click on ‘edit image’ in the media upload dialogue box:

Then click ‘Scale Image’ in the upper right of the dialogue box.  It depends on the theme you’re using, but as a general rule, most posts are about 600 to 700 pixels wide.  So if you don’t need your viewer to enlarge the image to see greater detail, no image needs to be wider than 600 to 700 pixels, and you can set that here.

Also note the Thumbnail Settings, which will allow you to choose which part of your picture will appear as a thumbnail in your post (this is especially valuable when the focus of your picture isn’t in the center–by default thumbnails will focus there).

And you’re done!  Also remember that you can resize images when inserting them into the post or page, but that won’t change the image size in the media library, just how it appears  on your site.  And as always, contact us with any questions!

The WP LaTeX developers created this plugin to “combine the power of LaTeX and the simplicity of WordPress to give you the ultimate in math blogging platforms” which, they admit really “sounds nerdy.”

The plug-in presumes you know LaTeX, but just in case you’d like to know more, or if you’re looking for a refresher, or if you’re just one of the curious, there is a useful tutorial here.  In addition, Jonas Reitz has kindly allowed us to link to an assignment in his Calc II class which includes some basics, like fractions, radicals, and integrals.  You can find that here.  And if you’re trying to write LaTeX code, you’ll find that a tester is an invaluable too.  You can find a good one here.   Thanks to Jonas for all these resources!

What follows, then, are guides and tips for how to use the WP LaTeX plug-in, written by the plug-in creators.  More information about them can be found here.  As always, contact us with any questions.

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How do I add LaTeX to my posts?

This plugin uses the WordPress Shortcode Syntax. Enter your LaTeX code inside of a[latex]...[/latex] shortcode.

[latex]e^{\i \pi} + 1 = 0[/latex]

You may alternatively use the following equivalent syntax reminiscent of LaTeX’s inline math mode syntax.

$latex e^{\i \pi} + 1 = 0$

That is, if you would have written $some-code$ in a LaTeX document, just write $latex some-code$ in your WordPress post.

For the curious, the shortcode syntax is slightly faster for WordPress to process, but the inline syntax is a little easier for us humans to read. Pick your poison.

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Can I change the color of the images produced?

Yes. You can set the default text color and background color of the images in the Plugins -> WP LaTeX admin page.

You can also change the colors on an image by image basis by specifying color andbackground attributes inside the LaTeX shortcode. For example:

[latex color="ff0000" background="00ff00"]e^{\i \pi} + 1 = 0[/latex]

will produce an image with a bright green background and a bright red foreground color. Colors are specified in RGB with the standard 6 digit hex notation.

The equivalent “inline” syntax uses fg and bg parameters after the LaTeX code.

$latex e^{\i \pi} + 1 = 0&bg=00ff00&fg=ff0000$

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Can I change the size of the image?

You can specify a size attribute in the LaTeX shortcode:

[latex size="4"]e^{\i \pi} + 1 = 0[/latex]

or, equivalently, an s parameter after the LaTeX inline syntax:

$latex e^{\i \pi} + 1 = 0&s=4$

The size can be any integer from -4 to 4 (0 is the default). These numbers correspond to the following LaTeX size commands.

size = LaTeX size -4 \tiny -3 \scriptsize -2 \footnotesize -1 \small 0 \normalsize (12pt) 1 \large 2 \Large 3 \LARGE 4 \huge

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The LaTeX images work, but they don’t really fit in with my blog’s theme

You can adjust the CSS used for the LaTeX images to suit your theme better. Go to Settings -> WP LaTeX and edit the Custom CSS.

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I want to break out of math mode and do some really wild stuff. How do I do that?

You can’t with this plugin. WP LaTeX forces you to stay in math mode. Formatting and styling for your posts should be done with markup and CSS, not LaTeX.

If you really want hardcore LaTeX formatting (or any other cool LaTeX features), you should probably just use LaTeX.

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Instead of images, I get error messages. What’s up?

• Formula does not parse: Your LaTeX is invalid; there must be a syntax error or something in your code (WP LaTeX doesn’t provide any debugging).
• Formula Invalid: Your LaTeX code attempts to use LaTeX commands that this plugin does not allow for security reasons.
• You must stay in inline math mode: Fairly self explanitory, don’t you think? See above.
• The forumula is too long: Break your LaTeX up into multiple images. WP LaTeX limits you to 2000 characters per image.
• Could not open TEX file for writing or Could not write to TEX file: You have some file permissions problems. See Intallation instructions.