4d

What's the status of 4D?

Our business uses 4D as our database and dynamic web server (and has been for at least the last 8 years). I understand that 4D used to be rather big as a all-in-one solution for serving web applications on the Mac in the past, but I don't see evidence of much continued use of it nowadays. Everybody seems to have moved on to any combina...

4D - is it any good?

Recently I found out that the company a friend of mine co-owns uses 4D, which I've never heard of before. They swear by it, but they're non-technical and what they say about it sounds like memorized marketing blurb. Unfortunately the 4D website also seems devoid of any actual information and is filled with words like "comprehensive", "so...

Why is my 4D Write document not saving with the rest of record?

In 4D, how do you guarantee that a 4D Write document is saved with the rest of the record? ...

Pros and cons of building apps with proprietary database systems

I've been interested in 4D SAS' database product for a long time, though have barely touched it in eons. In considering what tools to use for application development, especially one that will require a database component, what should be looked for when considering open-source tools like MySQL and PostgreSQL vs proprietary solutions like...

Simplifying a four-dimensional rule table in Matlab: addressing rows and columns of each dimension

Hi all. I'm currently trying to automatically generate a set of fuzzy rules for a set of observations which contain four values for each observation, where each observation will correspond to a state (a good example is with Fisher's Iris Data). In Matlab I am creating a four dimensional rule table where a single cell (a,b,c,d) will con...

Fastest data structure in Java (Processing for 4D visualization)

Hey, I've got an application that i need to use a visualization framework for. I'm currently leaning towards Processing for use in a Java desktop app. Problem: I've got ~500k+ state vectors i need to visualize. 4D points - XYZ and time (GPS-like) I need to be able to select time slices fast and easily, also having the capability to pl...

QPix QPx_AcqRunSession does not preview the image being captured

We are upgrading our project to 4D v12 and our QPix plugin stopped showing us a preview of the image we are about to take. The image capture works just fine; the only problem is that the preview simply shows a white screen. If I select the "Video Settings..." button I get a screen with a preview, so I know that it should be possible to ...