density

Calculating an area under a continuous density plot

I have two density curves plotted using this: Network <- Mydf$Networks quartiles <- quantile(Mydf$Avg.Position, probs=c(25,50,75)/100) density <- ggplot(Mydf, aes(x = Avg.Position, fill = Network)) d <- density + geom_density(alpha = 0.2) + xlim(1,11) + opts(title = "September 2010") + geom_vline(xintercept = quartiles, colour = "red"...

Calculating relationship density across a 1:n relationship

Hi guys, We have a database of listings that contains 2 million records, each with one or more (of a potential 2500) categories (1:n). Over time, some listings have been added to many irrelevant categories (some listings have as many as 50 categories where we like to keep it below 5.) What I'd love to do is audit each category like so...

difference between methods to scale a bitmap

Hi, There are at least two methods to scale a bitmap in Android, One is to use "inScaled, inDensity, inTargetDensity" in "BitmapFactory.Options" when decode a bitmap source. The other is to use a "Matrix" in "Bitmap.createBitmap". What I am curious is what the difference between these two method is? What about the quality of produced b...

Dip to pixel conversion results in the exact same value.

I am trying to convert dips to pixels using the following function. I’ve tried low, medium, and high density emulators and regardless of the emulator I use, the pixel value remains the same value as the dip value I pass into the function. private int ConvertDips(float dips) { int pixels = (int) TypedValue.applyDimension(TypedValue.COM...

Android Emulator loading wrong density

I am trying to simply test my app under a QVGA setting, but 95% of the time when I run the QVGA emulator I created, it loads the resources associated with HVGA. I have custom bitmaps that I include in my app, so it's crucial for me to be able to verify the appearance. To see what the density was being treated as, I added the following c...