First of all: what am I trying to do?  I have an application to view images. It uses the canvas element to render the image. You can zoom in, you can zoom out, and you can drag it around. This part works perfectly right now.  But let's say I have...
I'm using a simple line graph in d3 with interpolation of "step-after".  var line = d3.svg.line()     .x(function(d) { return x(d.date); })     .y(function(d) { return y(d.close); }); // Note that with step-after, the last data point show...
I'm trying to interpolate between two colours in HSV colour space to produce a smooth colour gradient.  I'm using a linear interpolation, eg:  h = (1 - p) * h1 + p * h2 s = (1 - p) * s1 + p * s2 v = (1 - p) * v1 + p * v2   (where p is the per...
I have a large set (>2000) of time series data that I'd like to display using d3 in the browser.  D3 is working great for displaying a subset of the data (~100 points) to the user, but I also want a "context" view (like this) to show t...
Writing a function to animate some elements when it is called, however I cannot set any kind of transition.ease().  var circles = canvas.selectAll("circle")         .data(orgs)         .enter().append('circle')         .attr('cx&#...
In this jsfiddle, label transitions from one text to another by decreasing font of old text, and in turn increasing the font of new text.  However, I would like new text to apperar in "typewriter" fashion, like in this jsfiddle. How to write...
I'm loading different indicator CSV files into JavaScript, example:  CSV for population:  id,year,value AF,1800,3280000 AF,1820,3280000 AF,1870,4207000 AG,1800,37000 AG,1851,37000 AG,1861,37000   For each indicator file I need to:   Gap fill miss...
I use a JSON file for common phrases so I don't have to type them and maybe in the future they can be translated. So for example in my main code I want to say You don't have the permission to use ${command_name}. This works perfectly fine har...
I have this function that I use to calculate the index from u,v points based on its respective uStep and vStep values  function getIndex1( u,v, uStep, vStep ) {     var res = [];      for( var i = 0; i < 45; i++ ) {         res[i] = Math.round( v...
I want to write an INTERPOLATION function in JavaScript in order to be able to use Google Sheets instead of Excel for a number of purposes. In Excel, I have this user defined function written in VBA:  Function interpolate_1D(xreq As Single, x As Rang...

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