area

I'm new to d3js and trying to adapt the streamgraph example from here http://bl.ocks.org/mbostock/4060954 : ...to work with my own data that tracks visitors to an art exhibition from different places (online, guestbook, museum). I've made some progress and I think my data's in the right format but I'm getting some really wonky final y values and my example isn't showing anything. My data starts as csv: index,date,venue,num_visitors 0,4/6/2013,online,3844 0,4/6/2013,museum,789 0,4/6/2013,guestbook,20 1,4/7/2013,online,217 1,4/7/2013,museum,718 1,4/7/2013,guestbook,20 And then I nest it to

import java.lang.Math; import java.awt.* public class Triangle implements Shape { java.awt.Point a; java.awt.Point b; java.awt.Point c; public Triangle(java.awt.Point a, java.awt.Point b, java.awt.Point c) { this.a = a; this.b = b; this.c = c; } public double getArea( ) { double area; return area = Math.abs((a-c)*(b-a)-(a-b)*(c-a)); } ... http://upload.wikimedia.org/math/f/e/5/fe56529cdaaaa9bb2f71c1ad8a1a454f.png <--area formula I am trying to calculate the area of a triangle from 3 points (x,y) from a 2D Cartesian coordinate system. I'm assuming that my above formula correctly yields the area

is it possible to make only a part of a div clickable -- like a clickmap/imagemap? May with jQuery? Hint: i don't want edit the html (misused template with 200 separate html files). When your div is clicked, the event handler receives the event, so you can test the position of the click. If needed, you might want to use the clicked element position and size, using $(this).offset() , $(this).width() and $(this).height() . For example : $('mydivselector').click(function(e) { if (e.pageY > $(this).offset().top + 0.5*$(this).height()) { // bottom was clicked } else { // up of the div was clicked }

Currently I did a FFT of a set of data which gives me a plot with frequency at x axis and amplitude at y axis. I would like to calculate the area under the graph to give me the energy. I am not sure how to determinate the area because I am without the equation and also I only want a certain area of the plot rather than whole area under the plot. Is there a way I can do it? There are many ways to do numerical integration with Matlab. Here is an example: %# create some data x = linspace(0,pi/2,100); %# 100 equally spaced points between 0 and pi/2 y = sin(x); %# integrate using trapz, which

Possible Duplicate: Algorithm needed for packing rectangles in a fairly optimal way I have N rectangles, each of a random size (random width & height). All rectangles are parallel to the X & Y axes. I'm looking for an algorithm that helps me arrange these rectangles side-by-side in a way that the resulting bounding rectangle has minimum area and the potential gaps around / between the input rectangles are as small as possible. Rectangles cannot be rotated and may not overlap each other. (I need these to automate the arrangement of game sprites so I can create sprite sheets and save sprite

I am trying to figure out a way to get the area inside a specific contour line? I use matplotlib.pyplot to create my contours. Does anyone have experience for this? Thanks a lot. From the collections attribute of the contour collection, which is returned by the contour function, you can get the paths describing each contour. The paths' vertices attributes then contain the ordered vertices of the contour. Using the vertices you can approximate the contour integral 0.5*(x*dy-y*dx), which by application of Green's theorem gives you the area of the enclosed region. However, the contours must be