Develop Reference

How to set padding between value labels and line for MPAndroidChart LineChart

When I create a line chart with values for each point, the values on the chart overlap the line, as shown in the screenshot. Is there a function to add padding to the values to raise them up so that this doesn't happen? I've looked all over the place for an answer to this or even someone else having the same issue and haven't found what I'm looking for.
My current chart:

I figured it out.
Based on this line in the source code:
int valOffset = (int) (dataSet.getCircleRadius() * 1.75f);
The padding is calculated based on the radius of the circle on the line, so my solution is to increase the size of the circle, set the outer radius to be transparent, and set the hole color to be the same as the line, which accomplishes what I want. This may not work for everyone, depending on what you're trying to do, but it worked in my case.

Android GraphView - How to use separate LabelFormatter?

I'm using Android GraphView. I want to use DateAsXAxisLabelFormatter for x-axis, and a custom LabelFormatter for y-axis. Otherwise the y-axis labels gets cut off. See this: android graph-view y axis numbers being cut out
If I use static padding as suggested in the answers of above question, then there is extra padding sometimes.
See the images below:
When there are integers in y-labels (and I have given large padding to cope with numbers like: -0.0231, -0.0450, etc.):
When there are floating points in y-labels (and I have give small padding to make it look nice for numbers like: 10, 25, 40, etc):
And I'm unable to find the sweet spot.
If I could use a separate for both of the axes then I would set setMaximumFractionDigits(2), and provide a static padding. That remove my problem. But I couldn't do both, it seem to override the other (see the code for better understanding). I can either use DateAsXAxisLabelFormatter or a DefaultLabelFormatter but not both at the same time.
Here is the code:
NumberFormat nf = NumberFormat.getInstance();
nf.setMaximumFractionDigits(2);
nf.setMaximumIntegerDigits(2);
graphView.getGridLabelRenderer().setLabelFormatter(new DateAsXAxisLabelFormatter(MainActivity.this, simpleDateFormat));
graphView.getGridLabelRenderer().setLabelFormatter(new DefaultLabelFormatter(nf, nf)); // This overrides the previous LabelFormatter
// If I try to set them both together. I get this error.
graphView.getGridLabelRenderer().setLabelFormatter(new DateAsXAxisLabelFormatter(MainActivity.this, simpleDateFormat), nf);
//setLabelFormatter (LabelFormatter) in GridLabelRenderer cannot be applied to (DateAsXAxisLabelFormatter, java.text.NumberFormat)
How do I use both of the LabelFormatter separately for both axes?

MPAndroidChart: How do I remove gridlines?

In my LineChart beside the lines that are shown on the full numbers parallel to the x-axis, many horizontal gridlines are shown:
How can I get rid of these lines?

Those look like axis lines. You can toggle the axis lines by calling setDrawGridLines(false) on each Chart axis. For example, to clear all of them simply do something like this.
LineChart myChart = ...;
myChart.getXAxis().setDrawGridLines(false);
myChart.getAxisLeft().setDrawGridLines(false);
myChart.getAxisRight().setDrawGridLines(false);

MPandroidchart Double YAxis with different scales

I want that my chart has two YAxis with different scales like the image . How I can change the scale for each axis?

Version 2.0.0-beta was released over the weekend with a CombinedChart, which allows plotting Line-, Bar-, Scatter- and CandleData in one chart. So the feature is finally available.
One note about what I found during my upgrade, you can't simply addDataSet() for each one, you have to generate the individual DataSet types (Bar, Line, Scatter, etc) and then use SetData() for the appropriate type, to trigger rendering.
Here is the example code.

The author of MPAndroidChart library clearly specifies here, (MPChart - Scatter Chart and LineChart in same plot), that this function is not yet available. So, I am also looking for a nicer approach.
As such, you can display two different chart types as one, still using this library, only by overlapping them.
I have done this on my side as it follows:
1. Edit the activity layout xml, having a FrameLayout as charts container.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
.......
<FrameLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:id="#+id/root_view">
</FrameLayout>
.......
</LinearLayout>
Now, in the Activity class, build the chart objects and attach them to the previous container:
// construct the charts, as different objects
// make sure to have valid Data Sets
LineChartItem lineChart = new LineChartItem(lineChartDataset, getApplicationContext());
BarChartItem barChart = new BarChartItem(barChartDataset, getApplicationContext());
// get the charts' container
FrameLayout frameLayout = (FrameLayout) findViewById(R.id.root_view);
// populate the container with the charts' views
frameLayout.addView(lineChart.getView(0, null, getApplicationContext()));
frameLayout.addView(barChart.getView(1, null, getApplicationContext()));
PROs/CONs for such a practice:
PROs
You have more combined charts with MPAndroidChart.
CONs
You need to take care of X and Y Labels alignment.
User Events: only the upper (in Z order) Chart View will get the user input, so you need to make sure that all the other chart views behave in the same manner (either processing OR ignoring the input, like zooming the chart or value selection).
I hope for a quick release of this great lib having this option. Thank you in advance Philipp Jahoda!

In my case, I'd every thing as suggested by the mpandroidcharts
Still I was getting same scale on "y axis right" and "y axis left"
the culprit was
combinedChart.axisLeft?.axisMinimum = //some calculations
combinedChart.axisLeft?.axisMaximum = //some calculations
combinedChart.axisRight?.axisMinimum = //some calculations
combinedChart.axisRight?.axisMaximum = //some calculations
Basically a copy paste error when you copy your perfect code from bar or line chart where setting the axis minimum and maximum where required.

BarSeries linewidth ignored on Shinobi

I'm trying to set the width of the bars of a BarSeries with Shinobi.
Code's following:
DataAdapter<String, Double> da1 = new SimpleDataAdapter<String, Double>();
da1.add(new DataPoint<String, Double>("q1", 1.0));
da1.add(new DataPoint<String, Double>("q2", 3.0));
da1.add(new DataPoint<String, Double>("q3", 4.5));
da1.add(new DataPoint<String, Double>("q4", -2.5));
BarSeries series1 = new BarSeries();
series1.setDataAdapter(da1);
BarSeriesStyle css1 = series1.getStyle();
css1.setLineWidth(180.0f);
css1.setAreaColor(Color.YELLOW);
CategoryAxis xAxis = new CategoryAxis();
chart.setXAxis(xAxis);
xAxis.getStyle().setInterSeriesPadding(0.2f);
NumberAxis yAxis = new NumberAxis();
chart.setYAxis(yAxis);
yAxis.getStyle().setInterSeriesPadding(0.2f);
chart.addSeries(series1);
What happens is that the line css1.setLineWidth(180.0f); is completely ignored. I can put 1.0f or 1000.0f and the lines are always the same width no matter what.
What am I missing, or doing wrong? I'm using shinobi 1.5.1.
Edit: same goes with ColumnSeries:
ColumnSeries cs = new ColumnSeries();
DataAdapter<Float, Integer> adapterAxis = new SimpleDataAdapter<Float, Integer>();
adapterAxis.add(new DataPoint<Float, Integer>(0f, 3));
cs.getStyle().setLineColor(Color.BLACK);
cs.getStyle().setLineWidth(1f);
cs.setDataAdapter(adapterAxis);
1f or 20f, nothing changes.
chart.addSeries(cs);
Edit: following Kai's answer.
I tried playing around with setInterSeriesPadding, but it doesn't do what I need in that if I approach 1.f as padding value the bar will shrink, but if I set 0f the bar will have a minimum height and the space between them will remain 'big'.
To be clearer: I have 4 bars at 0 to 4 on the Y axis with different X values. Each one is centered more or less on the Y value (not really, but not important right now). E.g. bar centered in 2 will go from ~1.8 to ~2.2 and bar centered in 3 will go from ~2.8 to to ~3.2. I want them thicker, so that they go from ~1.55 to ~2.45 and from ~2.55 to ~3.45. How do I do that?
Edit 2 (images):
Actual:
Desired (sorry for my lack of Paint skills, it was just a way to show that I want them thicker):

When you refer to width of a bar series, I am going to assume you mean the height, i.e. measuring from the top to the bottom of the bar. I'd like to mention that the setLineWidth() method is not intended for this purpose, but in fact this method is used to style the line which is drawn around the edge of a bar (or column) to act as a border. As the value passed to this method is increased, the bars (or columns) remain the same size, but the line grows inward. Subsequently, a large number will give the appearance of no line, as the bar or column will have a line so thick that it fills the entire bar (or column).
If you wish to manipulate the height of the bars (or the width of the columns) you need to use the methods:
http://www.shinobicontrols.com/docs/ShinobiControls/ShinobiChartsAndroid/1.5.1/Premium/Normal/apidocs/docs/reference/com/shinobicontrols/charts/AxisStyle.html#setInterSeriesPadding(float)
and
http://www.shinobicontrols.com/docs/ShinobiControls/ShinobiChartsAndroid/1.5.1/Premium/Normal/apidocs/docs/reference/com/shinobicontrols/charts/AxisStyle.html#setInterSeriesSetPadding(float)
I hope that you find this information useful. Thanks and kind regards,
Kai.
EDIT:
Hello Stephen,
Thanks for the extra information.
So today I created a quick app, using your code to populate a Shinobi chart with data.
I did see the thin bars issue which you describe. I believe in order to correct this you also need to call the method Axis.setInterSeriesSetPadding(float).
Although when you use a single series in your chart it is not obvious, this method does affect the spacing between individual bars. By default there is a small spacing between bars if this method is not explicitly called.
Please remember also that these two methods expect a float value between 0 (no padding at all) and 1. I suggest you call both of these methods with a parameter of 0.0 and slowly increase the values until you achieve the appearance you wish. You should only need to call these 2 methods on your category axis, not the data axis.
Whilst building my app with your code I did notice that you use a bar series, but you have your category axis on the x axis. I found when I built my app it initially only displayed 3 bars as the first category ("q1") was rendered as having a zero data value. This is because categories are internally given an integer index, and so the first category is stored with a 0 index.
The typical way to use a bar series is to have the categories on the y axis and the data values on the x axis. I modified my app to use this configuration and I found all 4 bars showed correctly. Furthermore I was able to have a padding ranging from nothing, where the bars were butted up against each other, to a lot of padding where the bars appear thin.
I hope that this helps,
Thanks,
Kai.
Disclaimer: I work for ShinobiControls.