Here is a link to an excellent wiki that explains how to put greek symbols in ggplot2. In summary, here is what you do to obtain greek symbols Text Labels: Use parse = T inside geom_text or annotate. Axis Labels: Use expression(alpha) to get greek alpha. Facet Labels: Use labeller = label_parsed inside facet. Legend … Read more
The identity matrix, in terms of the projection and modelview matrices, essentially resets the matrix back to its default state. As you hopefully know, glTranslate and glRotate are always relative to the matrix’s current state. So for instance, if you call glTranslate, you are translating from the matrix’s current ‘position’, not from the origin. But … Read more
Views are all drawn on the same GUI thread which is also used for all user interaction. So if you need to update GUI rapidly or if the rendering takes too much time and affects user experience then use SurfaceView.
This should work – just linearly scale the red and green values. Assuming your max red/green/blue value is 255, and n is in range 0 .. 100 R = (255 * n) / 100 G = (255 * (100 – n)) / 100 B = 0 (Amended for integer maths, tip of the hat to … Read more
The standard method would be to do the separating axis test (do a google search on that). In short: Two objects don’t intersect if you can find a line that separates the two objects. e.g. the objects / all points of an object are on different sides of the line. The fun thing is, that … Read more
Try below code: Resources resources = context.getResources(); int resourceId = resources.getIdentifier(“navigation_bar_height”, “dimen”, “android”); if (resourceId > 0) { return resources.getDimensionPixelSize(resourceId); } return 0;
Use -qscale:v to control quality Use -qscale:v (or the alias -q:v) as an output option. Normal range for JPEG is 2-31 with 31 being the worst quality. The scale is linear with double the qscale being roughly half the bitrate. Recommend trying values of 2-5. You can use a value of 1 but you must … Read more
There are different ways to measure the height depending on what you need. #1 getTextBounds If you are doing something like precisely centering a small amount of fixed text, you probably want getTextBounds. You can get the bounding rectangle like this Rect bounds = new Rect(); mTextPaint.getTextBounds(mText, 0, mText.length(), bounds); int height = bounds.height(); As … Read more
Create the initial plot: library(ggplot2) d <- rnorm(100) df <- data.frame( x = 1, y = d, group = rep(c(“gr1”, “gr2”), 50) ) p <- ggplot(df) + stat_boxplot( aes( x = x, y = y, color = group ), fill = “transparent” # for the inside of the boxplot ) The fastest way to modify … Read more
Here’s an excellent article with illustrations by a Google engineer: http://ssp.impulsetrain.com/porterduff.html PorterDuff is described as a way of combining images as if they were “irregular shaped pieces of cardboard” overlayed on each other, as well as a scheme for blending the overlapping parts. The default Android way of composing images is PorterDuff.Mode.SRC_OVER, which equates to … Read more