knowm / xchart Goto Github PK

did you change something?
Hopefully this will be fixed, was my first target to download the latest release

The description can be found here: #52

e.g. sometimes i need such chart:

    Collection<Number> xData = new ArrayList<Number>();
    Collection<Number> yData = new ArrayList<Number>();
    for ( int i = 0; i < 10; i++ ){
        xData.add(i);
        yData.add(i*i);
    }
    xData.add(10);
    yData.add(null);

When the frame to display a chart is too small for the chart to be displayed, the code below will go into an infinite loop (in the while loop):

  private BigDecimal getGridStep(int tickSpace) {

    // the span of the data
    double span = Math.abs(maxValue.subtract(minValue).doubleValue()); // in data space

    int tickMarkSpaceHint = (axisDirection == Direction.X ? DEFAULT_TICK_MARK_STEP_HINT_X : DEFAULT_TICK_MARK_STEP_HINT_Y);

    // for very short plots, squeeze some more ticks in than normal
    if (axisDirection == Direction.Y && tickSpace < 160) {
      tickMarkSpaceHint = 25;
    }

    double gridStepHint = span / tickSpace * tickMarkSpaceHint;

    // gridStepHint --> significand * 10 ** exponent
    // e.g. 724.1 --> 7.241 * 10 ** 2
    double significand = gridStepHint;
    int exponent = 0;
    if (significand == 0) {
      exponent = 1;
    }
    else if (significand < 1) {
      while (significand < 1) {
        significand *= 10.0;
        exponent--;
      }
    }

Is it possible to get an access to a JFrame which is created by
new SwingWrapper(chart).displayChart(); ?

Actually displayChart() returns void. I would like to gain access to that JFrame because i'd like to set:
setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE).

Currently when I close that frame the whole application exists.

Polynomial, exponential, Gaussian, others...

1. allow passing in of date format string
2. improve date axis tick calculations
3. Would be nice to be able to set the font for text
4. allow setting of locale on chart

When using the SwingWrapper with a Chart (generated by QuickChart, don't think that's relvant), if the window is scaled too small, the window stops updating and the whole frame hangs. The window can't be normally closed either, it has to be force-closed.

It would be great if seriesName can recognize new line character '\n' and render it on legend properly

See the attached screenshot, the length of the lines in the legend is quite large for such small charts, and can not yet be customized as it is at fixed length of 8*3=24 pixels atm.

Would be nice if this could be made customizable.

1. Allow user defined min and max axis values.

It would be nice to have possibility to create a chain of settings for an series.
Currently I can set only one parameter:
chart.addSeries( ... ).setLineColor(Color.red);
And to be honest I don't have idea how to set another one :)

However, if setLineColor() (and other) will returns Series I can write something like:
chart.addSeries( ... ).setLineColor(Color.red).setMarker(...);
and so on.

If there is another way to achieve this let me know.

Hello i havedownload and unzipped the files. but when i try to run the jar by clicking it it doesn't do anything
Can you help me hot to install it and how to start using it?

Sometimes it's necessary to set the minimum/maximum values on an axis. I propose to add a function that calls the AxisPair addMinMax function so that you can at least increase the range if needed.

I've forked the code and have added this and will send a pull request once it's tested.

I'm trying to display date formats such as "yyyy-MM-dd HH:mm:ss" and currently, the fact that the labels are displayed horizontally greatly limits the total number of labels that can be printed along the X Axis.

I would like to be able to provide an angle to which the labels get tilted (between 0 and 360°). To maximize space, a 90° or 180° angle could then be used.

PS: I just noticed I can't seem to find a way to define the number of gradations on the X-Axis either (i.e some sort of granularity that defines the number and length of each interval). That seems like it would be a good combination with the feature I'm asking here, if it doesn't already exist.

Someone wanted this functionality here: http://stackoverflow.com/questions/14767577/how-to-make-limits-on-the-y-axis-be-the-same-using-xchart

I got this in an email today...

I was playing around with the new setX/YAxisMin/Max, and found some unexpected results, as show in these screenshots:

This shows two sets of data plotted on a log plot, with Xchart choosing the axis ranges:

double[] xData = new double[]{0.0, 1.0, 2.0, 3.0, 4.0 ,5,6};
double[] yData = new double[]{106, 44, 26,10, 7.5, 3.4,.88};
double[] yData2 = new double[]{102,49,23.6,11.3,5.4,2.6,1.25};
mychart.getStyleManager().setYAxisLogarithmic(true);

For the plot below I set Y-axis range to 0.01 - 1000 in the code. The axes draw properly, but the data are misplaced:

mychart.getStyleManager().setYAxisLogarithmic(true);
mychart.getStyleManager().setYAxisMin(0.01);
mychart.getStyleManager().setYAxisMax(1000);

Below are the same data, plotted with the x axis limits set to -5 and 10, again the axes are correct but the data misplaced:

mychart.getStyleManager().setXAxisMin(-5);
mychart.getStyleManager().setXAxisMax(10);

Like most charting libraries, multiple x-axes per chart should be possible such as shown here: https://bitcoinium.com/ using the Flot Javascript library. Each series should be assignable to an axis. Each axis should be shown on the chart and it should be possible to define whether the axis goes on the left or right side. The data plot should of course scale to the full extend of each axis.

The original feature request for this can be found here: #31