generatedata | A powerful , feature-rich , random test data generator | Generator Utils library

Make a true data type for your TableView items.

It was the non-declaration of the precision and scale of the Type Decimal but the error displayed was not correct

To control the implicit serialisation done by the framework, use a custom JsonConverter.

Register it with the serializer or in Startup.cs, with AddMvc().AddJsonOptions(...) or AddControllers().AddJsonOptions(...)

The date problem appears to be with the default serialisation of dates.

With a bounded source, Flink will automatically send a watermark with the value Watermark.MAX_WATERMARK after all of the input has been consumed. So it should be enough to create an event-time timer for Long.MAX_VALUE.

It looks like your max y value will be 100px and that is not very much and pales in comparison to the 1000px max x value. You need to convert the y values to dps or some other scaling value to fill up more of your view.

In detail, within generateData() x will be set to a range of 50..1,000 in increments of 50 while y values will be randomly assigned values between 5 and 100. In the drawing code, you use these values for drawLine() which takes pixels for its arguments. 1,000 pixels in the x-direction will get you some distance on most devices (333.3 dps on a device with a density of 3 pixels/dp), but a maximum value of 100 for the y-value will get you at most 33.3 dps on the same device - that is 1/10 the distance.

Let's say that you want the x values to span the width of the Plotter view and, likewise for the y-axis, the values should span the height. So, when x == 0, the x value for drawLine() should also be 0. When the x-value is 1,000, the x value for drawLine() should be with width of the Plotter view or

x_view = viewWidth * x/1,000

Likewise, for the y value for drawLine():

y_view = viewHeight * y/100

Change the drawing for loop to something like this:

Actually it does not have anything to do with your clear color - the screen gets cleared correctly. The problem is the xPosList and likewise the yPosList ArrayList.

As soon as the user taps the screen the generateData() function gets called which keeps adding elements to both ArrayList. But: you never clear those! So as soon as you tap the screen twice, the ArrayList's contain random data from the first and the second tap.

You need to clear those right before the for-loop:

You could iterate through the list and save the unique dataframes into an .xls file using different sheets. Then on Python create a list, read the sheets using pandas and finally append them to a list in order to obtain the same structure.

So in R:

Since you need to select the whole hierarchy, you need to group the results by your topmost node, i.e., country, and rebuild from there

In order to sort things, you need "things" to sort. Therefore you must group together all three numbers in a single entity, and then sort those entities. I suggest you use a Task class, and let it handle things like generating a unique task number. Avoid global variables.

Here is a minimal reproduction (based on your code) of just taking your three numbers in a tuple, combining them with the builtin "zip" and sorting that: