In this case, how would you save values to a file?
Hi,
I need your advice. I have a Vi with lots of controls and the user can change many settings.
If I stop and start the vi again, you'll surely know, all settings are back to default, due to the fact that LabVIEW unfortunately does not allow to make values default programmatically.
Nevertheless there are many possibilities to save and load the settings. But which one is the best in my case?
I have boolean buttons, over 60 numeric controls, two file pathes and one numeric array.
I could write all of them separated by tabs in a text file (see screenshot), and read them back - but this is very laborious and prone to mix-up.
I tried clustering, but it's not possible due to the array, which I cannot put into a cluster.
What would be the best and simplest way to accomplish this saving and reading of the settings? What would you recommend?
Greetings
Johannes
LabVIEW 7.1.
Windows XP Professional 2002 SP 2
Intel Core 2 Duo, 2,4 GHz
Message Edited by candidate on 12-01-2008 10:00 AM
You could write a VI that set values from a file using VI server. With VI server you get references to all controls and create a list of label.text. When you read the value for "Smierung" you search the index of the reference to that control in the label array and set the value using "Value" property.
Play around with VI server and control references.
Regards,
André
Using whatever version of LV the customer requires. (LV5.1-LV2012) (www.carya.nl)
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How would you create this effect?
I am curious if there is a fairly straight-foward away of creating the effect seen in this image. I am talking about the pixelated effect made up of many little red boxes of various hues at the top part of the image.
I was thinking of zooming in real close to an image in photoshop and doing a screen capture, but I'd rather have a vector image that can be easily scaled in size and easy to change the hue to different colors.
Something like this able to be done in illustrator without building it a box at a time?
Regards,Well I'd say that PDF is a vector.
The PDF contains nothing other than a raster image. It contains no vector paths.
(By the way: "A vector" is a single expression of a direction. Calling a vector-based illustration "a vector" is like calling a raster-based image "a pixel.")
I zoomed in as close as I could and didn't see any pixels.
All you could see is pixels. That's all that's there.
If it's raster I'd be interested in knowing what resolution...
Its resolution is 1. It's a single-pixel raster image (as given away in its title).
I've never experienced a raster image that didn't get more pixelated the larger you scaled it up.
Yes, you have. That's exactly what I demonstrated in post 5 and in the PDF.
The operative word in your comment is more pixelated. That misconception is the point of the demonstration. Your image is already pixelated, and that's exactly what you want. It won't be "more" pixelated whatsoever, no matter how large you scale it.
At the heart of the [quite common] misconception is this: What you are calling "resolution" is not. True resolution is the measure of the amount of information contained. A raster image contains only a fixed amount of information. PPI is merely a scale factor. It's merely an expression of information density, not quantity. As you can see, that PDF is every bit as "resolution independent" (i.e.; scaleable) as a vector square.
The same priciple applies to your raster image. Your whole intent in your posted example is to display pixelation. So if the very thing you're trying to depict is the pixelation of, say, a 10 pixel x 20 pixel raster image, then all you need in order to depict that at any scale is a 10 pixel by 20 pixel raster image. At a scale of 10 PPI, you've got a perfect depiction of 10 square Pixels Per Inch. At a scale of 200%, you've got a perfect depiction of 5 square Pixels Per Inch (i.e.; 10 Pixels Per 2 Inches). You can scale it to the size of the moon and you'll have a perfect depiction of 10 Pixels Per Moon. It's just as scaleable as a 10 x 20 array of vector squares.
In other words: All the actual resolution of your raster image (all its information—all its pixels, in all their squareness) is already visible. Reducing its information density (by scaling it larger) will not reveal more of its actual information (the square shape of its pixels—the information that one usually wants to conceal or disguize about raster images, but not in this case).
The whole purpose of making sure your raster images have "sufficient resolution" in desktop publishing is to disguise the squareness of their pixels (what is commonly called "pixelation"). But that is exactly what you are intending to depict in this case. And you want to be able to depict that with equal clarity at any scale. There's no need to re-draw it as vector paths in order to do that. In this situation, you are not trying to avoid "pixelation," you are trying to show it, which is exactly what a raster image does by its nature.
Think of it this way: If all you are trying to draw is 200 squares, it can easily be argued that a raster image is more "data efficient" than a file containing 200 square vector paths. For each vector path, you have to include four coordinate pairs (800 anchor points). For a raster image, all you need is 200 color values.
This is not just a symantic or academic or pompous know-it-all point of argument. It's a point widely applicable to many common situations, and something every graphics professional should understand. For example, consider the software instructions author who pointlessly frets over the misunderstood "requirement" for pixel density when his illustrations necessarily consist of screenshots that are, after all, supposed to accurately and clearly depict what the user sees on his screen. Or the fact that you see single-pixel raster images scaled to the full width of the page, or dimensions of a table cell or large section of a whole background on web pages everyday. Or the widespread misconception that intentionally fuzzy raster effects like soft drop shapows "require" 300 PPI.
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