How do you convert an image sequence to long, horizontal graphic?

[vocal orbit]

Is there a way to convert several files, of an image sequence, into a horizontal sprite sheet/graphic? I'm seeking way to automate this instead of manually doing it. I've also had no luck with the contact sheet feature. Not sure if that actually works as intended.

[elder tundra]

Are you possibly talking about stitching panoramic images? There is a function for this: File --> Automate --> Photomerge

Otherwise, please describe in more detail what you would like to do.

[lean dust]

The intend of the contact sheet feature is to provide a visual reference of all the images you have spected in little thumbnails in the same way we used (and still have) contact prints for film photography
https://en.wikipedia.org/wiki/Contact_print
it's a specific thing with a specific format.
Now as @elder tundra noted, we need more info on your actual workflow.
For example you would want to stack automatically layers in the document, or create multiple artboards, and import each image as artboards, etc.
We need to know your what your end result will be. Visual references are good,

I suspect the answer will be create templates and automate with say: Smart objects and layer comps, but no way we can know without a proper view of what you're trying to do

[vocal orbit]

I am trying to create a horizontal sprite sheet. Just a long horizontal (and a vertical option would also be nice) image that contains each frame of an animation.

[lean dust]

how many do you have to make? Could you create a template with smart objects as images, and just replace the images on the fly from there? if you have loads, the "replacing part" could be taken care of with layer comps.
If you have a huge amount of them, a combination of the above, and possibly go have a look at what variables can do.
https://www.youtube.com/watch?v=eXAehw27Anw
https://www.youtube.com/watch?v=1PYu9dsaE5I
https://www.youtube.com/watch?v=eyBg8WjFU1E