I am writing a C# desktop application that requires a graphical representation (XoY) of some values (Y - value, X - (in) time).
chart1.Series[0].Points.AddXY(time, new Random().Next(-325, 531)); //this operation occurs at a set interval
The operation does its job, adding up values; however, in time the chart has the tendency to
"squeeze" itself which makes interpreting it a much harder task.
I want to make the graphic generate a better output, despite the number of points.
Notes
I consider that a good example of graphical representation would be one generated by an oscilloscope.
The chart is an spline.
The point addition is triggered upon a tick of a timer.
Depending on what you want there are several choices. My guess is that you want to keep all data points and simply want to add a scrollbar. To do you can write:
ChartArea A1 = chart1.ChartAreas["yourChartAreaByNameOrNumber"];
A1.AxisX.ScrollBar.Size = 12;
// show either just the center scroll button..
A2.AxisX.ScrollBar.ButtonStyle = ScrollBarButtonStyles.SmallScroll;
// .. or include the left and right buttons:
A1.AxisX.ScrollBar.ButtonStyle =
ScrollBarButtonStyles.All ^ ScrollBarButtonStyles.ResetZoom;
// looks better inside, but ymmv
A1.AxisX.ScrollBar.IsPositionedInside = true;
A1.AxisX.ScrollBar.Enabled = true;
A1.AxisX.ScaleView.Size = 100; // number (!) of data points visible
You may want to play with the size and placement. Please pick the number of data points you want to have visible at any time..
If you want the visible area to follow the new data like in an oscilloscope, you can set the scroll position :
Series S1 = chart1.Series["yourSeriesByNameOrNumber"];
A1.AxisX.ScaleView.Position = S1.Points.Count - A1.AxisX.ScaleView.Size;
Note that you need to set it again after adding any data!
If you also want to let the users adapt the zoom range set
A1.AxisX.CursorX.IsUserSelectionEnabled = true;
Related
I have a gantt chart contrains tasks.
I declared the PointWidth as 0.25
GanttChart.Series["Tasks"]["PointWidth"] = "0.25";
this works good when I have few tasks but whenever I have more tasks the pointWidth (range) becomes smaller and smaller!
I want to keep it 0.25 and to put scrollbar when there are many tasks.
The CustomProperty PointWidth is in percent of the visible axis.
So with one point the bar or column is really fat and the more data points you add the thinner they will get.
If you want to keep a fixed width while changing the number of data points you need to use PixelPointWidth instead.
Note however that by default now the bars/columns get closer and closer to each other until the overlap.
To give them enough room and show scollbars instead, you need to enable the built-in zooming mechanism as MSChart will not use normal Scrollbars.
This should help:
Series s = chart1.Series[0];
s.SetCustomProperty("PixelPointWidth", "12"); // 12 pixels
var ca = chart1.ChartAreas[0];
ca.AxisX.ScrollBar.Enabled = true;
ca.AxisX.ScaleView.Size = 30; // show a value range of 30
chart1.Refresh(); // usally not needed, but we change a custom property
Note that the ScaleView.Size is in data values. This is the 3rd of the three coordinate system in the chart: percentages, pixels and values! Very powerful and rather tricky..
I'm plotting relatively large amounts of data (~ 1 million points). The plot is working fine, but it seems that it is forcing all of the points within the viewable window despite default scrolling being enabled.
Any way to make it more readable? E.g. to spread the points out on the x axis. Perhaps zooming? I've looked a while and am rather lost.
You can add the following lines to enable the zooming function.
chart1.ChartAreas[0].CursorX.IsUserEnabled = true;
chart1.ChartAreas[0].CursorX.IsUserSelectionEnabled = true;
chart1.ChartAreas[0].CursorY.IsUserEnabled = true;
chart1.ChartAreas[0].CursorY.IsUserSelectionEnabled = true;
You can certainly choose to zoom only one of the axis.
chart1.ChartAreas[0].AxisX.ScaleView.Zoom(0d, 200d);
I have created a chart in the image below and I need to insert in addition to the existing labels, the end labels on the extreme left and right of the x-axis. There are numerous datapoints and therefore I cannot set the interval to 1 for the labels as they'll clutter the axis. I have already tried setting the property
chartHistory.ChartAreas[0].AxisX.LabelStyle.IsEndLabelVisible = true;
but it doesn't seem to work. How can I achieve this?
You may try:
chartHistory.ChartAreas[0].AxisX.IsMarginVisible = true;
chartHistory.ChartAreas[0].AxisX.LabelStyle.IsEndLabelVisible = true;
Or probably you will have to add the labels yourself,
you can either use DataPoint.AxisLabel:
chartHistory.Series[0].Points[0].AxisLabel = "5/4/2010";
or more flexibly:
chartHistory.Series[0].Points[0].AxisLabel =
System.DateTime.FromOADate(chartHistory.Series[0].Points[0].XValue).ToShortDateString();
(and the same for the last point in series)
or you can add a custom label to the AxisX control:
chartHistory.ChartAreas[0].AxisX.CustomLabels.Add(0, 20, "5/4/2010");
See also this answer and this answer.
I have a dotnetcharting graph with 3 series. I can change the style of the whole graph to stacked.
ChartIn.YAxis.Scale = Scale.Stacked;
But I want to just stack two out of the three series. So that for each there are two bars combined into one stack with another whole bar next to it.
Can this be done?
In the end I made the data I wanted separated from the stack into a separate filled line series. Not ideal but it looked fine.
ChartThree.SeriesCollection[3].Type = SeriesType.AreaLine;
The way to accomplish this is by creating an additional scale and setting the extra series's YAxis to that scale. The second scale can be stacked independently of whether or not the first scale is stacked. Note that you will need to adjust the ranges on the second scale in order to make the values show up in the correct relative size.
Here's an example that produces a chart with two separately stacked sets of data (using a chart that has previously been populated with a total of 4 series):
//set main chart to stacked
Chart.YAxis.Scale = Scale.Stacked;
//create new axis, assign it to relevant series, and set it's scale to stacked
Axis a2 = new Axis();
Chart.SeriesCollection[2].YAxis = a2;
Chart.SeriesCollection[3].YAxis = a2;
a2.Scale = Scale.Stacked;
//tie the scales together to ensure proper relative display
Chart.YAxis.SynchronizeScale.Add(a2);
I am trying to construct a chart using the native ASP.NET 4.0 charting control.
I've done nearly everything I wanted to do, but if you look at the following screenshot:
You'll notice that the Y axis labels are all wonky - that is, they are decimals, and they don't fall directly on any of the actual gridlines.
The purpose of my chart is to show a value that will always be between 0 and 16. I need to know the exact value, so I was able to set the gridlines to represent each value, by using this code:
Chart1.ChartAreas["ChartArea1"].AxisY.MajorGrid.Interval = 1;
As you can see, it is showing all lines, 0 to 16. However, the Y axis labels not only do not line up, but aren't even whole values. I would like there to be a label for EACH gridline, and I'd like them to be whole values.
I've done my share of googling, but I mostly find stuff pertaining to turning off the gridlines altogether, which is not what I want.
Any ideas?
can you not just set AxisY.Interval?
chart1.ChartAreas["ChartArea1"].AxisY.MajorGrid.Interval = 1;
chart1.ChartAreas["ChartArea1"].AxisY.Interval = 1;
I created a test chart quick and got the following:
When I set the interval, I only set the property for the Axis Interval property
chart1.ChartAreas["ChartArea1"].AxisY.Interval = 1;
The default behavior sets the major grid and major tick to this interval unless you have otherwise overridden a property that turns auto off for everything. Microsoft Charting aka Dundas charting (where Microsoft got the code) can be tricky this way.
While I cannot speak for every property within Microsoft Charting, it helps to set the most non-specific property you can find. Only go deeper if you do not get the desired result as going deeper can have unintended consequences by overriding the defaults which generally work quite well.
i.e.:
chart1.ChartAreas["ChartArea1"].AxisY.Interval = 1;
instead of
chart1.ChartAreas["ChartArea1"].AxisY.MajorGrid.Interval = 1;