I am trying to achieve a gauge graph that will have a gradient based on the percentage it is full, similar to the image below. The closest I could manage is showing all the gradient colors regardless of the value - Like here.
var x = 80; // Change x to see effects.
Did anyone managed to get a gradient based on value?
You can use yAxis stops and make small trick adding gradient to your chart. You can for example add points to your gauge (inside your load event callback function) with values decreasing from your normal y value to 0. It will give you a chance to have something similar to gradient with multiple points.
function(chart) {
var y = this.series[0].data[0].y;
for (var i = y; i >= 0; i = i - 1) {
chart.addSeries({
data: [i],
stickyTracking: false,
enableMouseTracking: false
}, false)
}
chart.redraw();
}
Here you can see an example how it can work: http://jsfiddle.net/64mfcg3v/6/
Kind regards,
Related
I would like to create nice curved edges in my Cotoscape.js graph using the unbundled-bezier style. According to the database I have to set the control-point-distance(s) automatically, so I came up with following code:
{
selector: 'edge',
css: {
'curve-style': 'unbundled-bezier',
'target-arrow-shape': 'triangle',
'control-point-weights': '0.25 0.75.',
'control-point-distance': function( ele ){
console.log(ele.source().position());
var pos1 = ele.source().position().y;
var pos2 = ele.target().position().y;
var str = '' + Math.abs(pos2-pos1) + 'px -' + Math.abs(pos2-pos1) + 'px';
console.log(pos1, pos2, str);
return str;
}
}
}
My problem is, that the graph is rendered with straight lines ant the curvy line appears only when I click on some. Also, when I move the nodes the curve moves nicely with the node, but the node positions (ele.source().position().y) does not change
A style function ought to be a pure function. Yours is technically not: It depends on state outside of the edge's data.
The only way an arbitrary function could be used to specify style is if the function is continuously polled. That would be hacky and prohibitively expensive.
You must use a pure function if you want to use a custom function. Either rewrite your function to rely on only the edge's data or use a passthrough data() mapping and change the edge's data whenever you want to modify the edge.
I'm trying to update my axis with custom labels because I want my users to be able to use different datasets. The current array of label names i load in have 17 elements in it.
When loading the page the graph only shows 11 elements as it can be seen here: http://servers.binf.ku.dk/hemaexplorerbeta/
How do I update my xScale to be able to all of the elements at once?
Here's the code for my scale:
var xScale = d3.scale.linear()
.domain([-25, genWidth])
.range([0, width-margin.right]);
And for my update function:
function updateAxisX(arr) {
var formatAxis = function(d) {
return arr[d % arr.length];
}
xAxis = d3.svg.axis()
.scale(xScale)
.orient("bottom")
.tickFormat(formatAxis);
SVG.select(".x.axis")
.call(xAxis)
.selectAll("text")
.style("text-anchor", "end")
.attr("transform", function(d) {
return "rotate(-65)"
});
}
I also have a zoom function where you can drag the graph around as well. As I mentioned the X Axis has 17 element in total, although on my graph they are repeated over and over. Is there any way I can prevent the zoom from letting the user drag the graph out of my "maximum" frame? In other words I'd like to be able to drag ONLY IF there has been zoomed in on the graph and ONLY until you reach the "edges" of the graph and no more.
Here's the code for my zoom function:
var zoom = d3.behavior.zoom()
.x(xScale)
.y(yScale)
.scaleExtent([1, 10])
.on("zoom", zoomTargets);
function zoomTargets() {
SVG.select(".x.axis").call(xAxis)
.selectAll("text")
.style("text-anchor", "end")
.attr("transform", function(d) {
return "rotate(-65)"
});
SVG.select(".y.axis").call(yAxis);
SVG.selectAll("circle").attr("cx",function(d){return xScale(d)}).attr("cy",function(d){return yScale(d)});
}
Also don't mind the huge red circles, they are just randomly made for testing something.
I should also mention that my graph is supposed be a scatter plot by the time I get everything done.
One quick question as well. Since I'm not using numbers, but custom labels where I've inserted strings. How do I insert the my circles accordingly to each spot on the x axis?
Thank you very much for your help in advance!
I trying to do some Joint Tracking with kinect (just put a ellipse inside my right hand) everything works fine for a default 640x480 Image, i based myself in this channel9 video.
My code, updated to use the new CoordinateMapper classe is here
...
CoordinateMapper cm = new CoordinateMapper(this.KinectSensorManager.KinectSensor);
ColorImagePoint handColorPoint = cm.MapSkeletonPointToColorPoint(atualSkeleton.Joints[JointType.HandRight].Position, ColorImageFormat.RgbResolution640x480Fps30);
Canvas.SetLeft(elipseHead, (handColorPoint.X) - (elipseHead.Width / 2)); // center of the ellipse in center of the joint
Canvas.SetTop(elipseHead, (handColorPoint.Y) - (elipseHead.Height / 2));
This works. The question is:
How to do joint tracking in a scaled image, 540x380 for example?
The solution for this is pretty simple, i fugured it out.
What a need to do is find some factor to apply to the position.
This factor can be found takin the atual ColorImageFormat of the Kinect and dividing by the desired size, example:
Lets say i am working with the RgbResolution640x480Fps30 format and my Image (ColorViewer) have 220x240. So, lets find the factor for X:
double factorX = (640 / 220); // the factor is 2.90909090...
And the factor for y:
double factorY = (480/ 240); // the factor is 2...
Now, i adjust the position of the ellipse using this factor.
Canvas.SetLeft(elipseHead, (handColorPoint.X / (2.909090)) - (elipseHead.Width / 2));
Canvas.SetTop(elipseHead, (handColorPoint.Y / (2)) - (elipseHead.Height / 2));
I've not used the CoordinateMapper yet, and am not in front on my Kinect at the moment, so I'll toss out this first. I'll see about an update when I get working with the Kinect again.
The Coding4Fun Kinect Toolkit has a ScaleTo extension as part of the library. This adds the ability to take a joint and scale it to any display resolution.
The scaling function looks like this:
private static float Scale(int maxPixel, float maxSkeleton, float position)
{
float value = ((((maxPixel / maxSkeleton) / 2) * position) + (maxPixel/2));
if(value > maxPixel)
return maxPixel;
if(value < 0)
return 0;
return value;
}
maxPixel = the width or height, depending on which coordinate your scaling.
maxSkeleton = set this to 1.
position = the X or Y coordinate of the joint you want to scale.
If you were to just include the above function you could call it like so:
Canvas.SetLeft(e, Scale(640, 1, joint.Position.X));
Canvas.SetTop(e, Scale(480, 1, -joint.Position.Y));
... replacing your 640 & 480 with a different scale.
If you include the Coding4Fun Kinect Toolkit, instead of re-writing code, you could just call it like so:
scaledJoin = rawJoint.ScaleTo(640, 480);
... then plug in what you need.
I have a stacked column chart like so:
I'm using a text annotation to display the $2495 in the rightmost stacked column. I've determined the proper y position experimentally - obviously that won't work for dynamically generated content.
Does anyone know how I can determine the height of the data points which compose the column? I presumed it would be something like:
Chart1.Series[0][0].Height + Chart1.Series[1][0].Height + Chart1.Series[3][0].Height + Chart1.Series[4][0].Height
But, alas, it is apparently not that simple. Any thoughts or insight would be greatly appreciate.
Check out this link
http://support2.dundas.com/OnlineDocumentation/WebChart2005/Custom_Drawing_Using_the_Paint_Event.html
See the examples at the bottom.
It turns out that it's all much simpler than I thought...the annotations use chart coordinates. This means that all you have to do is sum the actual values and use that as a y coordinate. I ended up doing this to calculate the heights of the respective series:
private int CalculateHeight(int i, ChartGraphics graphics)
{
var height = 0.0;
// find the respective heights of series i, add them together
for (var x = 0; x < this.Chart1.Series.Count(); x++)
{
height += this.Chart1.Series[x].Points[i].YValues[0];
}
return (int)height;
}
I then call that function like so:
for (var i = 0; i < chart.Series[0].Points.Count(); i++ )
{
var height = this.CalculateHeight(i, e.ChartGraphics);
this.Chart1.Annotations[i].Y = height + verticalPadding;
}
Much simpler than I thought.
Based on my experience with Zedgraph I could not set both of X and Y axes scale same to have a correct scatter graph! Assume we have a square grid of 10x10m cells in which each cell is a square shape 1x1m. when we try to draw points of such data, the output is not acceptable because each axis scaled to different scale. It is worse when we try to call Zoomall, then we find all points are fitted to chart area regardless their equal spacing!
I hope someone can help me to find a solution. Although Zedgraph is flexible library but this is a big fault!
perfectly aware, this q. is 9 years old, but still..
Have just encountered and solved the issue of presenting the graph in a square pane.
(It seems that was the OP question)
It's a bit "brute" and invokes redundant redraws, but gets the job done.
//"GraphWinFormsHost" is my ZGraph container
GraphWinFormsHost.SizeChanged += (sender, args) =>
{
//"IsEqualScale" is my property, indicating a square is needed
if(_ChartData == null || !_ChartData.IsEqualScale)
return;
_ZedGraphControl.GraphPane.Chart.IsRectAuto = true;
_ZedGraphControl.Refresh();
//here, the graph pane is redrawn according to available space
float x = _ZedGraphControl.GraphPane.Chart.Rect.X;
float y = _ZedGraphControl.GraphPane.Chart.Rect.Y;
float h = _ZedGraphControl.GraphPane.Chart.Rect.Height;
float w = _ZedGraphControl.GraphPane.Chart.Rect.Width;
float min = Math.Min(h, w);
_ZedGraphControl.GraphPane.Chart.Rect = new RectangleF(x, y, min, min);
};
Is Scale.IsAnyOrdinal true for any Axis.Scale's ?
ZedGraph appears to position nodes based on index offset rather than node value when the Scale.Type is set to AxisType.Text, Ordinal, DateAsOrdinal, or LinearAsOrdinal.
I recently had to solve the same problem. This is what has worked for me:
zg1.AxisChange();
if (myPane.XAxis.Scale.Max > myPane.YAxis.Scale.Max) {
myPane.YAxis.Scale.Max = myPane.XAxis.Scale.Max;
myPane.YAxis.Scale.Min = myPane.XAxis.Scale.Min;
myPane.YAxis.Scale.MajorStep = myPane.XAxis.Scale.MajorStep;
} else {
myPane.XAxis.Scale.Max = myPane.YAxis.Scale.Max;
myPane.XAxis.Scale.Min = myPane.YAxis.Scale.Min;
myPane.XAxis.Scale.MajorStep = myPane.YAxis.Scale.MajorStep;
}
zg1.AxisChange();
With the first call to AxisChange the control automatically calculate the correct values for my data. Then I copy the relevant parameters from one scale to the other one and apply the change.