How to create a long red line (limit line) in MPAndroidChart - android

I am using MPAndroidChart library version 2.2.4. My requirement is I want to set three marker lines in a BarChart with values "Minimum", "Average" and "Maximum" like in the image below, but I can't find any solution for this.


In MPAndroidChart 3.x.x what you are asking for is called a LimitLine
There is an example of how to consume it in the sample project:
LimitLine ll1 = new LimitLine(150f, "Upper Limit");
ll1.setLineWidth(4f);
ll1.enableDashedLine(10f, 10f, 0f);
ll1.setLabelPosition(LimitLabelPosition.RIGHT_TOP);
ll1.setTextSize(10f);
ll1.setTypeface(tf);
YAxis leftAxis = mChart.getAxisLeft();
leftAxis.removeAllLimitLines(); // reset all limit lines to avoid overlapping lines
leftAxis.addLimitLine(ll1);
If you require a customized limit line, you will have to look at the instructions in this question here

Related

I am using mp chart library for android and want that my maximum draw value to be on top of line and min draw value to be above the line

It wiil be great also to put margin there.
I am attaching also 2 sc .

Find the minValue and maxValue then the set the axisMin and axisMax values.
//use getAxisRight for right Y axis
YAxis leftAxis = lineChart.getAxisLeft();
leftAxis.setAxisMinimum(minValue);
//above line would be the same except
//"1" should be calculated and not hard coded
leftAxis.setAxisMaximum(maxValue - 1);

How to draw Range Chart MpAndroidChart with negative and positive value?

I'm using MPAndroidChart to draw Chart in my App. I have a problem when my Chart display data with value from negavite to positive.I reseached example of this lib by using BarChart but have not solution.
E.g. Column 1 will draw from -10 to 30. (has minValue and maxValue)
I don't know how to do that, BarChart is always draw from zero line.
I am setting like below:
implementation 'com.github.PhilJay:MPAndroidChart:v3.1.0-alpha'
YAxis leftAxis = mChart.getAxisLeft();
leftAxis.setAxisMaximum(100);
leftAxis.setAxisMinimum(-100);
float[] data = new float[]{-10f, 30f};
values.add(new BarEntry(1, data));
But have not effect. Please help me.
I want to draw chart like this image bellow:

MPAndroidchart : xaxis labels leaves more empty space at bottom

I want the xaxis labels to come down. Those large labels pushes the graph on top where i am not able to view the graph itself as shown in the figure given below. There is lot of space between the xaxis labels and legends(Legends not shown in figure below). I want to overcome this and view the chart. Find my code below
barChart.getAxisLeft().setAxisMinimum(-1.0f);
barChart.getAxisLeft().setDrawGridLines(false);
barChart.getAxisRight().setDrawGridLines(false);
barChart.getAxisRight().setEnabled(false);
barChart.getXAxis().setPosition(XAxis.XAxisPosition.BOTTOM);
barChart.getXAxis().setDrawGridLines(false);
barChart.getXAxis().setLabelRotationAngle(-90.0f);
barChart.getXAxis().setLabelCount(12);
barChart.getXAxis().setCenterAxisLabels(true);
barChart.getXAxis().setGranularityEnabled(true);
barChart.getXAxis().setValueFormatter(new IndexAxisValueFormatter(xAxisLabelList));
barChart.getXAxis().setAxisMaximum(12f);
barChart.groupBars(1f, 0.5f, 0f);
barChart.invalidate();

You can use barChart.setExtraBottomOffset(-10f); to reduce extra white-space below labels.
And increase your chart height in xml file.

MPAndroidChart - How to set range values from BarChart at 2.0.9v?

I´m using MPAndroidChart 2.0.9 version. I would like to set labels on y-axis from 0 to 100 and display always this range, but i can´t find the chart.setYRange() method.

The range can be customized via the YAxis class.
Here is the documentation: https://github.com/PhilJay/MPAndroidChart/wiki/YAxis-%28YLabels%29
YAxis y = chart.getAxisLeft();
y.setAxisMaxValue(100);
y.setAxisMinValue(0);

You can try to write this:
yAxis.setLabelCount(x)
This code should give you labels in steps of x, assuming you set a min and max value.
Example of my code:
YAxis y = mChart.getAxisLeft();
y.setAxisMaxValue(100);
y.setAxisMinValue(0);
y.setLabelCount(6);
This will give me labels from 0 to 100 in 6 steps, so: 0-20-40-60-80-100.

MPAndroidChart, how to center XLabels above grid-lines?

I have a simple linechart with MPAndroidChart library:
chart.setDrawYValues(false);
chart.setDescription("");
chart.setDrawVerticalGrid(true);
chart.setDrawGridBackground(false);
XLabels xl = holder.chart.getXLabels();
xl.setCenterXLabelText(true);
xl.setPosition(XLabelPosition.BOTTOM);
YLabels yl = holder.chart.getYLabels();
yl.setLabelCount(5);
// set data
chart.setData((LineData) mChartData);
chart.setDrawYValues(true);
chart.setValueTextSize(20f);
// zooming on both axis
chart.setPinchZoom(true);
chart.animateX(1000);
But I have a visualization problem. Labels on the X axis aren't under the relative grid line, but between the two lines (on Y axis I don't have this problem). Is there a way to put Y labels exactly under the relative grid line?

Calling this:
XLabels xl = chart.getXLabels();
xl.setCenterXLabelText(true);
will cause the labels to be drawn between the lines. If you call setCenterXLabelText(false); the labels should be exactly above the individual grid-lines.
Also check the example project LineChart. There the labels are exactly above the lines.
Update
There is no getXLabels method in version 3.1.0. Use this:
chart.xAxis.setCenterAxisLabels(true)

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